News for hackers. Stuff that matters.
Re:Tokamak Energy sets a temperature record among commercial... by noobermin on Sunday March 13, 2022 @05:28PM (#30665905)
To be honest a lot of the fusion news recently has made me skeptical (namely, for CFS guys who kinda smell a little sus to me if I'm being 100% honest), but this on the other hand is fantastic, actual results (although they should publish a paper on it, just my bias as a scientist), meeting good plasma temps with just $70M! Not a gigabuck not even 100 megabucks, that to me is a good sign for actual commercial fusion. Bravo to Tokamak Energy.
Re:Tokamak Energy sets a temperature record among commercial... by adhesive_wombat on Sunday March 13, 2022 @06:06PM (#30666222)
And to think, some people would rather spend $700 million on a boat[1].

If you wanted a legacy, you could hardly do better than being the Zefram Cochrane of energy. You don't even have to stop being an asshole!

[1] The Scheherazade for a current example of interest, but there are thousands more examples.

Re:Tokamak Energy sets a temperature record among commercial... by acchow on Sunday March 13, 2022 @06:12PM (#30666268)
> And to think, some people would rather spend $700 million on a boat[1].

This is the weirdest thing to me. How do billionaires think a big boat is cooler than building nuclear fusion? If I was a billionaire, I'd build space ships and underground tunnels and nuclear micro reactors

Re:Tokamak Energy sets a temperature record among commercial... by JumpCrisscross on Sunday March 13, 2022 @06:35PM (#30666408)
Large yachts are functional. They’re mobile own territory for people operating on the level of nation states.

Booking out a hotel for hundreds of aides, attachés and visitors is very difficult outside the largest cities. Securing it can be impossible. Particularly on short notice. A yacht solves those problems.

(I’d still pick the reactor.)

Re:Tokamak Energy sets a temperature record among commercial... by izzygonzalez on Sunday March 13, 2022 @06:48PM (#30666515)
I never thought of it from this perspective. A yacht could serve as a research vessel with slight added protection against political turmoil. One of the problems with setting up organizations inside of a nation-state are the economic and political risks. Without the necessary dive into the ethics of the proposition, it might serve as the Noah's ark for vital research and the associated minds.
Re:Tokamak Energy sets a temperature record among commercial... by Thorrez on Sunday March 13, 2022 @07:20PM (#30666780)
Sergey Brin uses his yacht for disaster relief. He has a charity that sends teams around the world to help with disasters.[1]

He also has a startup, LTA (Lighter Than Air), aiming to build blimps for humanitarian purposes.[2] According to this article he also wants to the blimp to be "luxuriously appointed" so it can be used as an air yacht.[3] LTA is based at Moffett Airfield in Mountain View, and I know I've seen blimps take off and land there every once in a while. When I see one I always wonder if it's Sergey's blimp.

[1] https://www.thedailybeast.com/google-co-founder-sergey-brin-...

[2] https://www.ltaresearch.com/

[3] https://www.businessinsider.com/google-sergey-brin-airship-c...

Re:Tokamak Energy sets a temperature record among commercial... by UberFly on Monday March 14, 2022 @03:47AM (#30669520)
Are we sure this isn't one of those tax-haven "foundations" that get you adulation and praise from the march-in-line media and a tax-free yacht and airship to use on the weekends? Maybe a "luxuriously appointed" "humanitarian" "tax haven"? I'm out of quote marks now.
Re:Tokamak Energy sets a temperature record among commercial... by adhesive_wombat on Monday March 14, 2022 @01:26PM (#30675247)
Right? If he wanted to spend 80 million on humanitarian missions he'd be better to have bought the HMS Ocean when it was in sale. As a helicarrier with a proven track record in humanitarian missions, it's vastly better equipped than a party boat stocked up from Home Depot.
Re:Tokamak Energy sets a temperature record among commercial... by adhesive_wombat on Sunday March 13, 2022 @06:57PM (#30666595)
Now there's a spec-fic book I'd read:

> Physicists trapped in indentured servitude aboard Elon Musk's converted droneship research station "Just Fucking Get It Done" as it sails the post-apocalytic seas.

> Just when they thought it couldn't get any worse, they dock at Peter Thiel's island bio-research facility and they have to take matters into their own nitrile-gloved hands before it's too late...

Re:Tokamak Energy sets a temperature record among commercial... by pastacacioepepe on Monday March 14, 2022 @07:01AM (#30670868)
Or pretty much the whole snowpiercer plot
Re:Tokamak Energy sets a temperature record among commercial... by irjustin on Sunday March 13, 2022 @09:13PM (#30667473)
> A yacht could serve as a research vessel with slight added protection against political turmoil.

Fun fact, this was part of the setup for Tenet.

Re:Tokamak Energy sets a temperature record among commercial... by missedthecue on Sunday March 13, 2022 @08:24PM (#30667183)
Most luxury yachts only have a passenger capacity of 12. There aren't hundreds of people on those.
Re:Tokamak Energy sets a temperature record among commercial... by nine_k on Sunday March 13, 2022 @08:39PM (#30667292)
They may have passenger capacity of 12, but they have a larger crew and servant quarters capacity. You can invite 11 more of your billionaire pals, and there'll be plenty of people around to serve their needs.
Re:Tokamak Energy sets a temperature record among commercial... by gigaflop on Monday March 14, 2022 @09:48AM (#30672399)
I've seen stories of megayachts that have their own smaller yacht following them with the water toys, and other humans who help provide entertainment for those owning the larger yacht. The first entry on the link below says that some kind of lab has been fitted into it.

https://www.boatinternational.com/yachts/editorial-features/...

If not for visions of space-faring billionaires, I could easily foresee sea-based billionaires with a small armada of support vessels to provide for them:

Old tankers could potentially be repurposed as massive hydroponic farms, or even fish farms. Why trust the local's mercury-and-parasite ridden fauna, when you can instead pull some fresh Tilapia 2 (genome will be slightly modified to prevent breeding with 'natties', probably will have different-colored skin) out of The Pond's hold?

A cruise ship would probably be the best host vessel for your employees, since it already has a lot of the features you'd need (sleeping, eating, refit some of the entertainment spaces into workspaces), and a smart move would have been to buy one during the Covid crash the operators had early on. Force your employees to register as residents in your port town of choice for optimal tax shelter status, and minimal legislative oversight.

Nuclear submarines could be used as top-secret skunkworks, since they could dive down in order to guarantee some amount of isolation from corporate spies. Once you have your roster for a project, you'd dive down a mile or so, and give the teams metrics to see who earns the most sunlight during the bimonthly surfacings. Lines up nicely with 2 week sprints, right?

But here's something I can't figure out: What would the flagship be? How many people would it need to support? Would it be one of the biggest of the armada (like the capital vessel), or would it be an incredibly-well-appointed cruiser?

Re:Tokamak Energy sets a temperature record among commercial... by jahnu on Monday March 14, 2022 @05:41AM (#30670313)
Still at least an order of magnitude fewer guests than was suggested above. A small hotel can host this many people.
Re:Tokamak Energy sets a temperature record among commercial... by acchow on Monday March 14, 2022 @03:56PM (#30677404)
Initially, I found this to be insightful.

Then I discovered that the $700 million superyacht Scheherazade can accommodate "40 guests in 22 cabins". I suppose you could fill the hallways with bunk beds as well for your "hundreds of aids, attaches, and visitors".

I don't think accommodating 40 guests is difficult "outside of the largest cities".

Re:Tokamak Energy sets a temperature record among commercial... by jahnu on Monday March 14, 2022 @05:39AM (#30670294)
> Booking out a hotel for hundreds of aides, attachés and visitors is very difficult outside the largest cities.

Even the biggest yachts can't host even close to these numbers of people. E.g. the gigantic Azzam superyacht, at a cost of $600M, and 180m in length, can host only 36 guests according to news reports.

Re:Tokamak Energy sets a temperature record among commercial... by cduzz on Monday March 14, 2022 @08:48AM (#30671762)
Probably that implies "36 guests" and their staff and support infrastructure.

I doubt when Buff Jezos goes to visit Gill Bates on his super yacht he shows up only with a couple suitcases.

Re:Tokamak Energy sets a temperature record among commercial... by antupis on Monday March 14, 2022 @03:28AM (#30669413)
Thing is that with that 700 million you could buy 2 - 10 million luxury property when you go new place.
Re:Tokamak Energy sets a temperature record among commercial... by jdhzzz on Sunday March 13, 2022 @07:44PM (#30666943)
Not mutually exclusive. How about a fusion powered yatch?
Re:Tokamak Energy sets a temperature record among commercial... by FooBarBizBazz on Sunday March 13, 2022 @09:42PM (#30667643)
Could be fission powered, if it's an old aircraft carrier.

You'd think a billionaire would have gotten one of those by now. Like China with the Liaoning... though, even the Liaoning isn't nuclear.

Actually, that's pretty amazing. The Americans have several nuclear carriers. The Soviets/Russians had/have several. And the French have one: the Charles de Gaulle. That's it. Nobody else has any. Not even China. Not even Britain (which does have nuclear submarines).

That's pretty amazing.

It really puts into perspective how powerful the United States is.

Granted, there's an argument that these are becoming floating targets, what with ASBMs, and as hypersonics come online. But still. They're pretty impressive things.

And even the Russians seem less capable than expected.

Which leaves basically just the US. Still.

Complacency would be a huge mistake -- and China is projected to start working on nuclear carriers pretty soon -- but, nevertheless, maybe reports of America's dethronement are premature.

Re:Tokamak Energy sets a temperature record among commercial... by LargoLasskhyfv on Monday March 14, 2022 @03:55AM (#30669577)
Many countries have rules which forbid privately operated ships powered by fission-reactors docking/anchoring. The German-built Otto Hahn wasn't allowed passage through Suez and Panama Channel, the US-built NS-Savannah was excluded from ports in Japan, Australia and New Zealand.

Though that was long ago, I'm unaware of changes regarding that.

So no cruising to your bunker in NZ on your supernukular toy when the SHTF :-)

Re:Tokamak Energy sets a temperature record among commercial... by FooBarBizBazz on Monday March 14, 2022 @10:52AM (#30673125)
Interesting. Your post led me to [1]. Even including all the (mostly Russian) icebreakers, the number of nuclear-powered vessels is quite small.

[1] https://en.m.wikipedia.org/wiki/Nuclear_marine_propulsion#Ci...

Re:Tokamak Energy sets a temperature record among commercial... by willis936 on Sunday March 13, 2022 @10:13PM (#30667833)
Aircraft carriers are large targets because they're so valuable. WWII Pacific Theater was centered around taking out enemy aircraft carriers while preserving your own. If you can have one that can operate on its own for months and out-speed any chemically-fuelled vessel: that's a huge advantage. Now imagine having a fleet of them. Nothing short of ready for war.
Re:Tokamak Energy sets a temperature record among commercial... by kevin_thibedeau on Monday March 14, 2022 @03:06AM (#30669296)
For Russians you'd want a nuclear ice breaker as the ultimate flex.
Re:Tokamak Energy sets a temperature record among commercial... by adhesive_wombat on Monday March 14, 2022 @03:38AM (#30669471)
Wouldn't that be ironic: oil billionaire buys a nuclear icebreaker just in time to never be able to use again because there's no ice to break.
Re:Tokamak Energy sets a temperature record among commercial... by credit_guy on Sunday March 13, 2022 @06:45PM (#30666488)
Many megayachts are chartered when not in use by their owner. So in the end they are investments that produce a return [1]

“ It's worth acknowledging that while owners will ultimately spend a huge amount for the privilege of having their very own superyacht, they're able to recoup some of these costs by chartering them out. Connor estimates that around 12 weeks of charter represents the annual operating cost of most yachts, which means owners can break even if they hire their boats out for the same length of time they use them during the year.”

[1] https://www.cnn.com/travel/amp/hidden-costs-of-owning-a-supe...

Re:Tokamak Energy sets a temperature record among commercial... by nerdponx on Sunday March 13, 2022 @07:02PM (#30666633)
Silly question, but who is renting the superyachts? Is it all just money laundering and tax sheltering back and forth among billionaires?
Re:Tokamak Energy sets a temperature record among commercial... by Inconel on Sunday March 13, 2022 @07:36PM (#30666899)
I assume people worth several hundred million dollars won't spend 10%-50% of their total wealth on a $100+ million yacht, but will still pay $1mil/week to rent one on occasion.
Re:Tokamak Energy sets a temperature record among commercial... by adhesive_wombat on Sunday March 13, 2022 @06:50PM (#30666546)
You might break even on running costs, but when do you break even on the outlay?

I guess you get some back if you sell it, and you probably never actually laid out for it as such rather than though some mad financial chicanery because simply paying for stuff is decidedly plebian.

Re:Tokamak Energy sets a temperature record among commercial... by credit_guy on Sunday March 13, 2022 @08:29PM (#30667217)
Here's an example: Moonlight II. It's a 300 foot yacht owned by a sheik [1]. The price is $100 MM. You can rent it for "from $705k per week" [2]. Could be more, I guess. If they manage to charter it for 30 weeks a year, that's a nice $21 MM. That more than covers any conceivable financing and operating costs. In fact, you'd be hard pressed to find an investment with a similar return.

[1] https://www.superyachtfan.com/yacht/moonlight-ii/

[2] https://www.fraseryachts.com/en/yacht-for-charter/moonlight-...

Re:Tokamak Energy sets a temperature record among commercial... by fnord77 on Sunday March 13, 2022 @10:00PM (#30667748)
> If they manage to charter it for 30 weeks a year

that's a big "if"

Re:Tokamak Energy sets a temperature record among commercial... by TylerE on Sunday March 13, 2022 @11:00PM (#30668093)
Something like that probably has a one week turnaround between charters just to deep clean the thing, and reposition for the next trip.
Re:Tokamak Energy sets a temperature record among commercial... by adhesive_wombat on Monday March 14, 2022 @03:42AM (#30669497)
Ew, yes can you imagine the mess.

I'm surprised no authority has raided one just after an investment banker party cruise, looked for the forgotten baggies and seized the vessel for "drug smuggling".

Re:Tokamak Energy sets a temperature record among commercial... by vkou on Monday March 14, 2022 @05:59AM (#30670451)
In most localities, the purpose of drug laws is not in constraining the behaviour of people wealthy enough to party on a super-yacht.
Re:Tokamak Energy sets a temperature record among commercial... by objektif on Sunday March 13, 2022 @11:15PM (#30668172)
10 weeks would put it on par with Equity returns. Still not bad.
Re:Tokamak Energy sets a temperature record among commercial... by 01100011 on Monday March 14, 2022 @02:01AM (#30668977)
Doesn't that also have the benefit of making the yacht a business expense?
Re:Tokamak Energy sets a temperature record among commercial... by adhesive_wombat on Monday March 14, 2022 @03:18AM (#30669346)
I think superyachts are too "tax-efficient" to be thought about in such simple terms.
Re:Tokamak Energy sets a temperature record among commercial... by CSSer on Sunday March 13, 2022 @07:10PM (#30666699)
I’m not sure that’s the point. I think it’s more about minimizing costs. The rest is just part of the opportunity cost.
Re:Tokamak Energy sets a temperature record among commercial... by taneq on Sunday March 13, 2022 @08:10PM (#30667103)
Eventually, yeah, I’d think so. I’m not nesting-doll-yacht rich but as I understand it:

1) You don’t buy something for $100+ million out-of-pocket. It’s easy to borrow money when you have money. The purchase would be financed at very close to market interest rates, and the repayments factored into the running costs.

2) The vessel would then be run as a business and chartered out for conventions, luxury cruises etc. Any profits would go to the owner.

3) The owner would then use the vessel as needed, maybe even paying like any other customer (albeit out of the profits generated by the boat itself, I’d imagine.)

4) Any remaining profits could be used to pay off capital, but probably aren’t. Instead, they’d be used to fund new ventures.

Re:Tokamak Energy sets a temperature record among commercial... by Schroedingersat on Sunday March 13, 2022 @08:08PM (#30667090)
Well the yacht is now an 'investment' so you get to claim it on taxes and get an instant 30% refund.

Your buddy sets up a special company just to build it and stiffs all his employees and suppliers. Then the quid pro quo gets you another 30% or so back.

Renting it out for another 12mo/year earns the remainder back in a decade or two.

You can also 'donate' the use of your yacht to have a big party (also known as a charity ball) from time to time if you feel you are paying too much tax. Make sure the 'charity' is one owned by one of your buddies and is primarily used for lobbying or undermining competitors.

Re:Tokamak Energy sets a temperature record among commercial... by NavinF on Sunday March 13, 2022 @09:45PM (#30667656)
> now an 'investment' so you get to claim it on taxes and get an instant 30% refund

I gotta ask, have you ever filed taxes? Cause that’s not how any of this works.

Re:Tokamak Energy sets a temperature record among commercial... by missedthecue on Sunday March 13, 2022 @08:24PM (#30667187)
How do I claim things on my taxes as "investments" for a 30% refund?
Re:Tokamak Energy sets a temperature record among commercial... by rich_sasha on Monday March 14, 2022 @03:03AM (#30669281)
Boats are fantastically expensive to maintain. You can surely recover some costs by renting them out, but I’d imagine it’s still mostly a net negative “investment”.
Re:Tokamak Energy sets a temperature record among commercial... by oneshot99991 on Monday March 14, 2022 @06:43AM (#30670756)
If it floats, flies, or fucks, it's cheaper to pay by the hour.
Re:Tokamak Energy sets a temperature record among commercial... by cduzz on Monday March 14, 2022 @09:00AM (#30671887)
It depends on why you've got a mega yacht.

If you're a state level actor, you've got state level security concerns. I doubt, for instance, the American or Russian consulate gets rented out for parties where they turn over the whole kit to some other organization.

Yes, there is "your" staff on-site to protect much of the yacht / facility, but that doesn't stop a determined actor who's got a week of somewhat unsupervised access from infesting the whole ship with bugs bombs and poisons.

Re:Tokamak Energy sets a temperature record among commercial... by adhesive_wombat on Sunday March 13, 2022 @06:23PM (#30666339)
Right? Big boats aren't even that big a brag, someone will always have a bigger one, and if yours is longest for now, then theirs has three helipads, and next year some tryhard will build a longer one anyway.

Being first to fusion would mean your name would be above even Einstein in history.

Re:Tokamak Energy sets a temperature record among commercial... by dwighttk on Sunday March 13, 2022 @07:44PM (#30666944)
Einstein didn’t fund theorists and researchers, he came up with the ideas.
Re:Tokamak Energy sets a temperature record among commercial... by objektif on Sunday March 13, 2022 @11:23PM (#30668212)
Such a practical application that solves world energy needs forever?
Re:Tokamak Energy sets a temperature record among commercial... by Ekaros on Sunday March 13, 2022 @07:25PM (#30666814)
It is all fun and games until someone orders a cruise ship as yacht... Which might happen, as it is only like 1,5-2 billion...
Re:Tokamak Energy sets a temperature record among commercial... by adhesive_wombat on Sunday March 13, 2022 @07:34PM (#30666884)
The natural one-up then must be an aircraft carrier.
Re:Tokamak Energy sets a temperature record among commercial... by chx on Sunday March 13, 2022 @08:16PM (#30667138)
I am reasonably sure trying to commission building one would bring the attention of the United States and ah, the situation would develop not necessarily to your advantage...
Re:Tokamak Energy sets a temperature record among commercial... by api on Sunday March 13, 2022 @06:19PM (#30666315)
The big boat is about status, which means attracting mates and increasing the odds of breeding before a lion eats you. Our brain stems don’t know what geological epoch we are in.
Re:Tokamak Energy sets a temperature record among commercial... by adhesive_wombat on Sunday March 13, 2022 @06:35PM (#30666407)
That a big useless boat is a vastly bigger panty-dropper then a working fusion reactor says everything about our species, doesn't it?
Re:Tokamak Energy sets a temperature record among commercial... by tiahura on Sunday March 13, 2022 @08:33PM (#30667247)
And just about every species on the planet.

Chicks dig the long ball.

Re:Tokamak Energy sets a temperature record among commercial... by VectorLock on Sunday March 13, 2022 @06:43PM (#30666481)
Girls in bikinis don't want to sun themselves on a fusion reactor.
Re:Tokamak Energy sets a temperature record among commercial... by jatone on Sunday March 13, 2022 @07:04PM (#30666647)
you just don't know the right girls.
Re:Tokamak Energy sets a temperature record among commercial... by akomtu on Sunday March 13, 2022 @07:05PM (#30666652)
Sun is a fusion reactor, and they choose, quite rationally, that getting tanned on a big boat under a big reactor is way better than getting tanned on on a cheap bench with that microscopic reactor.
Re:Tokamak Energy sets a temperature record among commercial... by fragmede on Sunday March 13, 2022 @09:38PM (#30667610)
I sense a future for the combination fusion reactor-tanning salon market.
Re:Tokamak Energy sets a temperature record among commercial... by LargoLasskhyfv on Monday March 14, 2022 @04:08AM (#30669653)
Re:Tokamak Energy sets a temperature record among commercial... by willis936 on Sunday March 13, 2022 @10:19PM (#30667869)
I can see the tagline.

"Gamma ray tanning beds: illegal in 220 countries!"

Re:Tokamak Energy sets a temperature record among commercial... by adhesive_wombat on Sunday March 13, 2022 @06:46PM (#30666492)
To be fair, you do get a better tan with a fission reactor.
Re:Tokamak Energy sets a temperature record among commercial... by phtrivier on Monday March 14, 2022 @05:34AM (#30670249)
How exactly does "funding a cool research project" gets you laid and / or allows for money laundering [1] ?

[1] https://www.theguardian.com/uk-news/2019/oct/24/superyachts-...

Re:Tokamak Energy sets a temperature record among commercial... by hwillis on Sunday March 13, 2022 @11:54PM (#30668369)
Well, Putin in particular has a pretty serious interest in not funding fusion, but that's just one example.
Re:Tokamak Energy sets a temperature record among commercial... by fennecfoxen on Sunday March 13, 2022 @06:27PM (#30666361)
The fusion reactor just uses a very inefficient process to turn energy into less energy. At least the big boat goes places.
Re:Tokamak Energy sets a temperature record among commercial... by adhesive_wombat on Sunday March 13, 2022 @07:03PM (#30666642)
IMO, spending 15TJ running a research reactor like JET at full whack for 6 hours (which is actually a lot of test fires) is of greater benefit than burning the better part of half a million litres of diesel moving a single billionaire and his lampreys around a bit.
Re:Tokamak Energy sets a temperature record among commercial... by CSSer on Sunday March 13, 2022 @07:11PM (#30666716)
You taught me a new word today. Props for creative use in context too, I might add.
Re:Tokamak Energy sets a temperature record among commercial... by tiahura on Sunday March 13, 2022 @08:35PM (#30667261)
Is it? We’ve been doing this for what, 30 years and all we really have to show for it is 30 years of hoping that the big breakthrough is 5-10 years away.
Re:Tokamak Energy sets a temperature record among commercial... by adhesive_wombat on Monday March 14, 2022 @03:35AM (#30669456)
Fusion reactor can be thought of in terms of "billions of dollars" away and progress is much clearer.

https://imgur.com/3vYLQmm.png

Integrating the curves is maybe $100 billion. And below a certain level of funding nothing can really be done (you can't build any reactor on $10 and a box of surplus paperclips the IRS donated from pity). The fact we actual got anywhere using the handful of "it's a start" research reactors like JET, which dates to 1984, that could get built is a testament to the scientists and engineers, not a indictment of the field.

Basically, if as much was spent on it as we spent on blowing up poor countries for no real reason (at least $2,000 billion, just for Afghanistan), we'd likely be onto the second or third generation. Or we'd have concluded decades ago that it really can't be done to a five-sigma certainty.

The cynic in me says there's a renewed push for it recently because China has 3 research reactors, the next one (CFETR) is designed to outperform ITER (which China is contributing to) and support research for DEMO (which is to say, it is or is very close to being designed for experimental power generation), and the US feels in danger of being beaten to it.

Re:Tokamak Energy sets a temperature record among commercial... by tiahura on Monday March 14, 2022 @01:22PM (#30675193)
That’s a big assumption that diminishing marginal returns don’t set in at $2B a year or $5 a year.

$500 worth of steroids may let me bench press 200lbs, but it doesn’t follow that with $50,000 I could lift my house.

Re:Tokamak Energy sets a temperature record among commercial... by TaylorAlexander on Sunday March 13, 2022 @10:45PM (#30668016)
We have a lot more than blind hope, if you care to learn about the state of fusion research today.
Re:Tokamak Energy sets a temperature record among commercial... by hypertele-Xii on Sunday March 13, 2022 @09:09PM (#30667453)
30 years is less than a fraction of an eyeblink in human history.
Re:Tokamak Energy sets a temperature record among commercial... by cplusplusfellow on Sunday March 13, 2022 @06:18PM (#30666307)
A lot of billionaires have organized businesses but never tinkered with anything constructive in their lives. They don’t even own a black and decker power tool.
Re:Tokamak Energy sets a temperature record among commercial... by contradictioned on Sunday March 13, 2022 @06:26PM (#30666356)
It is enough to own black and decker... Scnr
Re:Tokamak Energy sets a temperature record among commercial... by ars on Sunday March 13, 2022 @09:43PM (#30667652)
They do, for example: "Breakthrough Energy Ventures fund, founded by Gates, Bezos and other philanthropists"

In particular they backed "Commonwealth Fusion Systems".

Re:Tokamak Energy sets a temperature record among commercial... by willis936 on Sunday March 13, 2022 @05:33PM (#30665942)
What's sus about CFS? No one else is making 20 T confinement field coils. SPARC's campus is already up and the machine is being built. ARC is expected to have ground broken this year.
Re:Tokamak Energy sets a temperature record among commercial... by GOONIMMUNE on Sunday March 13, 2022 @07:20PM (#30666782)
Do you have a source on ARC breaking ground? I follow CFS and haven't heard anything- google didn't turn up anything either. Just curious
Re:Tokamak Energy sets a temperature record among commercial... by willis936 on Sunday March 13, 2022 @07:35PM (#30666885)
Just secondhand from a recruiter. I'm certain CFS will make announcements when they have something to announce.
Re:Tokamak Energy sets a temperature record among commercial... by willis936 on Monday March 14, 2022 @12:51PM (#30674776)
Oh, and a friend of mine told me that Bob Mumgard (CFS CEO) mentioned the hope to break ground for ARC this Fall during a seminar last Friday.

https://www.physics.wisc.edu/events/?id=6566

Re:Tokamak Energy sets a temperature record among commercial... by TaylorAlexander on Sunday March 13, 2022 @09:28PM (#30667563)
ARC is going to begin construction before SPARC is proven? That’s actually great news I just didn’t know about it. I guess they gotta find a way to spend their new $1.8B investment.
Re:Tokamak Energy sets a temperature record among commercial... by Mizza on Sunday March 13, 2022 @05:34PM (#30665951)
What about CFS is fishy to you? Those are the guys I'd put my money on, but I'm curious why you'd think otherwise.
Re:Tokamak Energy sets a temperature record among commercial... by Retric on Sunday March 13, 2022 @05:53PM (#30666124)
For me it’s the “seemingly” crazy unrealistic deadlines, which are achievable if they don’t actually try and hit net energy gain.

Use 20MW of energy to add 10MW into plasma, get 20MW of fusion, convert 30MW of heat into 10MW of electricity and they have reached their stated goal without actually achieving anything useful. And that’s assuming steady state operation rather than a fraction of a second pulse that briefly reaches their goals.

It’s exactly the same thing as a startup selling dollars for pennies and saying yea we’re going to make it up in volume.

Re:Tokamak Energy sets a temperature record among commercial... by DennisP on Sunday March 13, 2022 @06:35PM (#30666409)
ARC will be about the size of JET, and JET was built in four years, with most of that being just for the buildings. The test reactor, SPARC, will be about half that size.

Tokamak scaling is very well established. The output scales with the square of plasma volume, and the fourth power of magnetic field strength. Stronger magnetic fields also make the plasma more stable. JET already demonstrated a five-second plasma, which they only had to shut down because they have copper coils that would melt if operated longer than that.

Because of all this, many independent fusion researchers think SPARC will succeed in getting 10X gain in 2025. After that, the larger ARC should easily reach commercial levels.

Of all the commercial fusion companies, CFS is the most conservative one. Tokamak Energy is a close second, with a very similar approach. The other fusion startups are attempting approaches that have more physics risk, though many of them would have fewer engineering and economic difficulties if the physics does work out.

Re:Tokamak Energy sets a temperature record among commercial... by Retric on Sunday March 13, 2022 @06:48PM (#30666525)
Simply scaling SPAR or ITER doesn’t result in commercial operation.

First you need fuel, global Tritium supplies are tiny and DD fusion is much harder.

Next stability is an open question, no Tokamak has ever operated near maximum capacity for even 1 hour.

Add to that serious material science questions, etc etc and even Q>100 alone just doesn’t actually mean much.

Now let’s just assume all of that is solved, you still need to actually ensure your design is economically viable. Simply producing energy from fusion alone isn’t enough which means you need to cheaply solve not only all the above but do so cheaply.

Re:Tokamak Energy sets a temperature record among commercial... by DennisP on Sunday March 13, 2022 @07:16PM (#30666744)
These are valid points. I was just responding to your statement that their time frame is "achievable if they don’t actually try and hit net energy gain." They are trying, and are likely to accomplish net gain about as fast as they say they will.

They actually have a fairly practical-looking design though. ARC will use FLiBe for tritium breeding and coolant. That will surround an inner reactor wall that's 3D-printed and replaced annually. MIT already demonstrated joints in the superconducting tape, allowing the reactor to be opened up to replace the core.

Economic viability is an open question for all tokamaks. Some of the other designs would have a better chance of achieving low costs if things work out, but there's a much bigger question mark on the plasma physics.

Re:Tokamak Energy sets a temperature record among commercial... by pfdietz on Sunday March 13, 2022 @10:32PM (#30667942)
The other problem is that the thermal power density of ARC is about 1/40th that of a PWR reactor vessel. It's a much larger, much more massive/complex/expensive way to make heat.
Re:Tokamak Energy sets a temperature record among commercial... by Retric on Monday March 14, 2022 @04:33PM (#30677874)
Removing the need for large numbers of armed guards, giant concrete containment vessels, many many safety systems etc, should save some money.

It’s really not clear which would end up cheaper in the long run.

Re:Tokamak Energy sets a temperature record among commercial... by ncmncm on Monday March 14, 2022 @08:00PM (#30680091)
Spilling a thousand tons of melted lithium (and beryllium?) would be disruptive enough that containment, safety systems, and armed guards would still be needed. Also, not spending to protect your $100B facility from harm might make your insurance company nervous. (You did find an insurer, didn't you?)
Re:Tokamak Energy sets a temperature record among commercial... by Retric on Tuesday March 15, 2022 @10:10AM (#30685492)
If it actually cost 100B to built then your never going to break even.

As to containment, the lack of high pressure steam makes much thinner walls completely viable. You still need shielding around the vessel, but not a completely redundant system capable of containing highly energetic steam explosions.

In terms of risks, sabotage at a nuclear reactor can be vastly more expensive than just the cost of equipment. Modern reactors are reasonably safe, but not if people where actually trying to break them. Especially when you consider what someone could do with access to the fuel. It’s not weapons grade, but dirty bombs are horrific.

Re:Tokamak Energy sets a temperature record among commercial... by pfdietz on Tuesday March 15, 2022 @11:29AM (#30686526)
You do still need a very strong structure to resist outward pressure. It's isn't steam pressure, it's magnetic pressure, from JxB forces in the magnets. For ARC, the stainless steel supports for the magnets weigh 5300 tonnes, and comprise 3/4 of the mass of the entire reactor. The energy stored in that magnetic field is (I think) larger than would be stored in the steam of a PWR of the same thermal power output.

The building housing an ARC will be very large. The reactor itself is 20 meters tall, and the entire top half of it has to be lifted off and moved aside when changing out the vacuum vessel. All that lifting and moving will have to be done remotely because of radiation from the activated vacuum vessel, which then will need yet another shielded area where it can be broken down for disposal and the debris from that cleaned up or at least contained.

Re:Tokamak Energy sets a temperature record among commercial... by Retric on Tuesday March 15, 2022 @01:58PM (#30688612)
> would be stored in the steam of a PWR of the same thermal power output.

Safety system don’t just need to handle normal operations. The energy in a fusion reactors magnetic fields is very well known, a fission reactor steam explosion or potentially hydrogen explosions can bet vastly more violent.

Using Fukushima as a baseline. ~1,000 kg of hydrogen * 142 MJ/kg is a lot of energy and that was vented outside the primary containment vessel before detonating.

Granted this is not an inherent requirement for fission, but good luck convincing regulators it’s unnecessary.

Re:Tokamak Energy sets a temperature record among commercial... by pfdietz on Thursday March 17, 2022 @06:15PM (#30716458)
The ARC reactor uses 380 tonnes of TiH2 as a neutron shield for the magnets. This fully decomposes at the temperature of the molten salt, which could yield up to 15 tonnes of hydrogen.
Re:Tokamak Energy sets a temperature record among commercial... by ccraighill on Wednesday March 16, 2022 @06:46PM (#30705111)
https://www.sciencedirect.com/science/article/abs/pii/S09203... Sorbom 2015 has ARC listed at 3.3 meter major radius. It probably won't be exactly that in the end, but it also won't be 20m tall. Something closer to 8 meters probably?
Re:Tokamak Energy sets a temperature record among commercial... by pfdietz on Thursday March 17, 2022 @05:50PM (#30716270)
20m may be an overestimate, but 15m looks quite reasonable. Look at figure 1 in https://arxiv.org/pdf/1409.3540.pdf
Re:Tokamak Energy sets a temperature record among commercial... by ncmncm on Tuesday March 15, 2022 @10:36PM (#30694673)
> If it actually cost $100B to build then you're never going to break even.

IOW, we're never going to break even. You and I are paying now, and would in any case never get any of the revenue, if in fact any could be had.

But we are supporting the careers and research of plasma fluid dynamics physicists and their students, and a few of them might do other, actually useful, and anyway wholly unpredictable things, later. With a good measure of luck, none of those things will build up to any world-spanning catastrophes the way the steam engine did.

Re:Tokamak Energy sets a temperature record among commercial... by Retric on Wednesday March 16, 2022 @08:05AM (#30697738)
I give it 10% chance of being better than nuclear power in 30 years. That’s worth the investment even if the odds of a solid payoff are low, the upside is significant.
Re:Tokamak Energy sets a temperature record among commercial... by ncmncm on Wednesday March 16, 2022 @10:21PM (#30706871)
How? Better than fission is a very low bar.

p-B or D-He3 fusion, if achieved, would have application in the outer solar system even if not competitive here.

Re:Tokamak Energy sets a temperature record among commercial... by Retric on Thursday March 17, 2022 @08:39AM (#30710472)
> How?

Lower risks should mean fewer NIMBY issues, which means wider adoption. Nuclear advocates miss that if fission played a larger role in energy generation it would also see more major incidents. Which then risks a backlash etc.

Re:Tokamak Energy sets a temperature record among commercial... by TaylorAlexander on Sunday March 13, 2022 @09:31PM (#30667577)
It sounds like you might know the answer to this: I vaguely recall hearing them say the tritium is created in the reactor from duterium? Is that a thing?
Re:Tokamak Energy sets a temperature record among commercial... by DennisP on Sunday March 13, 2022 @09:39PM (#30667626)
It is, deuterium fusion's final product is half tritium (and half He3).

But D-T reactors would mainly breed tritium from lithium. The CFS reactor, for example, will immerse the reactor in a pool of FLiBe salt, which also functions as coolant. Each beryllium atom hit with a neutron emits two neutrons, and when neutrons hit lithium atoms they breed tritium. General Fusion does something similar with lead in place of beryllium.

Re:Tokamak Energy sets a temperature record among commercial... by TaylorAlexander on Sunday March 13, 2022 @09:43PM (#30667645)
Thank you. So do they need to source tritium externally at all? I’ve seen people claim CFS will have to source tritium, making it expensive to operate. Can they breed all they need?
Re:Tokamak Energy sets a temperature record among commercial... by DennisP on Sunday March 13, 2022 @09:47PM (#30667671)
They'll need tritium for startup. After that they shouldn't need more if they can get the breeding ratio high enough, but that might not be easy.
Re:Tokamak Energy sets a temperature record among commercial... by ncmncm on Monday March 14, 2022 @09:02PM (#30680597)
In practice it means the mix of Li-6 and Li-7 in your coolant pipes has to capture more than half of the neutrons emitted, and not too many of the slow neutrons released in intermediate reactions get stolen.
Re:Tokamak Energy sets a temperature record among commercial... by TaylorAlexander on Sunday March 13, 2022 @09:55PM (#30667710)
Interesting thank you!
Re:Tokamak Energy sets a temperature record among commercial... by pfdietz on Sunday March 13, 2022 @10:33PM (#30667948)
Unless a DT reactor can breed its own tritium it will be totally economically hopeless.
Re:Tokamak Energy sets a temperature record among commercial... by TaylorAlexander on Monday March 14, 2022 @04:08AM (#30669656)
Yeah. Someone the other day said in a comment that commercial fusion will never be viable because tritium is so expensive. But it does sound like breeding is the plan at least with ARC so I don't know what that commenter was thinking.
Re:Tokamak Energy sets a temperature record among commercial... by akomtu on Sunday March 13, 2022 @07:09PM (#30666694)
Doesn't Moon have immense supplies of tritium? I bet Musk, with his landing rockets, has bigger plans than just launching a bunch of sats.
Re:Tokamak Energy sets a temperature record among commercial... by DennisP on Sunday March 13, 2022 @07:44PM (#30666952)
Tritium has only a 12-year half-life, and decays to He3. The Moon has large supplies of He3, which could be fuel for more advanced fusion reactors.

He3 barely exists on Earth. However, pure deuterium fusion is easier than He3 fusion, and its waste is half He3, half tritium.

Re:Tokamak Energy sets a temperature record among commercial... by pfdietz on Monday March 14, 2022 @07:16AM (#30670987)
3He on the moon occurs in regolith at a concentration of maybe 10 ppb. At that concentration, simply heating the regolith to drive out the 3He uses more energy than the 3He would produce in fusion, unless extreme heat recycling can be achieved (and good luck transferring heat into/out of powders in vacuum.)

Even if it could be recovered, all the 3He on the entire moon might power the world for maybe 100 years.

Re:Tokamak Energy sets a temperature record among commercial... by DennisP on Monday March 14, 2022 @08:56AM (#30671836)
Thanks, didn't realize the energy balance was so bad.

That strengthens the point I was trying to get at, which was that there's no reason to go to the moon for He3 when, if we can get net power from He3, we can just make it in a D-D reactor and gain energy in the process.

Re:Tokamak Energy sets a temperature record among commercial... by pfdietz on Tuesday March 15, 2022 @08:50AM (#30684590)
My favorite 3He source would be "Planet X", if it exists and is an Earth (or perhaps even Mars) size planet out far enough that the temperature at the exobase is low enough to retain 3He in its atmosphere. Sure, getting there would be difficult, but this scenario assumes we have D3He fusion, which we can handwave would get the miners out there in a reasonable amount of time.
Re:Tokamak Energy sets a temperature record among commercial... by ncmncm on Wednesday March 16, 2022 @10:17PM (#30706841)
If it takes long enough to get there and back, folks back home might perfect p-B fusion in the meantime.
Re:Tokamak Energy sets a temperature record among commercial... by pfdietz on Thursday March 17, 2022 @07:23AM (#30709862)
I don't think p-11B fusion will be possible. The groups attempting it look really sketchy (as in, talking about doing things that clearly don't work.)
Re:Tokamak Energy sets a temperature record among commercial... by ncmncm on Thursday March 17, 2022 @02:16PM (#30714245)
It will take fundamental advances to get to p-11B fusion. A startup working today is anyway in no position to achieve such fundamental advances; that is more in the line of national laboratories, or would be if they were not fooling with ITER instead. Maybe some of the ITER work will be useful for other things.

For D-3He fusion to be useful, we have to hope that it will be economically viable to synthesize 3He, in the meantime. Arguably, we ought to be making and stockpiling tritium now so there will be enough 3He when we need it; but that might be too optimistic.

Re:Tokamak Energy sets a temperature record among commercial... by nimish on Sunday March 13, 2022 @06:52PM (#30666570)
I don't think they'll have SPARC by 2025 but the physics work out. It's basically a bog-standard tokamak with superconducting magnets but with much more current capacity and therefore magnetic field strength from newer HTS. It's the fabrication of the magnets at scale that's totally new engineering and manufacturing; as we saw with Tesla that's quite hard. Plus the supply chains of HTS tapes aren't exactly mature.

I think both Tokamak and CFS have roughly the same strategy of using bigger magnetic fields. Given the scalings here https://royalsocietypublishing.org/doi/10.1098/rsta.2017.043... + JET working well it's a lot less risk than whatever most others are doing. Make a JET sized tokamak but have 5x the magnetic field strength gives a 625x gain in power, ideally.

Re:Tokamak Energy sets a temperature record among commercial... by Retric on Sunday March 13, 2022 @07:00PM (#30666620)
I agree with what your saying, but that’s doesn’t mean the end result is even close to an economically viable fusion reactor. Look back in 1990 people could have spend a lot of money building a truly monumental reactor and hitting Q>100 briefly. Nobody suggested that was a good idea because all the other unsolved problems which is why ITER was being built in the first place. The point wasn’t simply to scale it was to test blanket materials etc in an environment very close to a working reactor.

SPARK is undoubtedly a more efficient design but it’s not a solution for any of the major outstanding problems.

Re:Tokamak Energy sets a temperature record among commercial... by nimish on Sunday March 13, 2022 @08:36PM (#30667271)
Of course. They are basically a privately funded research group at this point. No one has any idea how to operate a profitable fusion plant.
Re:Tokamak Energy sets a temperature record among commercial... by apendleton on Sunday March 13, 2022 @07:13PM (#30666723)
By those kinds of metrics, Tokamak Energy haven't "achiev[ed] anything useful" either.

Note that both companies are aiming to build a tokamak using high-temperature superconducting coils, which will facilitate energy gain in a small, high-field tokamak. CFS has built the coils, but no tokamak yet. Tokamak Energy has built a tokamak, but it doesn't use HTS coils yet, it uses standard/super-inefficient copper ones (they're developing the HTS coils as a separate project and expect to marry them in a future prototype). This prototype has the same "make it up on volume" problem, it's just lossy in a different way.

Both have made important advances that demonstrate critical components that will be necessary to do the full thing, but different ones, and neither of them has demonstrated everything. If anything, CFS's piece is arguably more important, because other copper-magnet high-field tokamaks have been built before (e.g., Alcator C-Mod at MIT, essentially the predecessor to CFS's prototype), but nobody has built a full-sized HTS coil before.

Re:Tokamak Energy sets a temperature record among commercial... by Retric on Sunday March 13, 2022 @09:34PM (#30667596)
I am all for fusion research, in the context of research. But CFS’s short term goals comes off as a publicity stunt which rubs me the wrong way. Like IBM’s Watson playing Jeopardy etc, where what’s achieved seems like a breakthrough for non exports.

It’s possible they could succeed long term, but I don’t think it’s particularly likely.

Re:Tokamak Energy sets a temperature record among commercial... by apendleton on Sunday March 13, 2022 @09:55PM (#30667715)
Sure, I think that's valid. I just don't think Tokamak Energy's announcement is less of a stunt. They've both made progress on a well-defined but ultimately not-that-big piece of a big pie. Just different pieces. If the act of making big press pronouncements around incremental progress is a stunt, they all do it.
Re:Tokamak Energy sets a temperature record among commercial... by willis936 on Sunday March 13, 2022 @10:24PM (#30667899)
I hardly view "build a machine to understanding burning plasmas and steady-state tokamak operation" as a publicity stunt. These are hard machines to build in the best of conditions. The design of any power plant must be informed of results from machines like SPARC.
Re:Tokamak Energy sets a temperature record among commercial... by acidburnNSA on Sunday March 13, 2022 @08:35PM (#30667258)
You'll love this voodoo fusion article.

https://vixra.org/pdf/1812.0382v1.pdf