JET will attempt Q-record by the end of the decade

Point out news stories, on the net or in mainstream media, related to polywell fusion.

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crowberry
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JET will attempt Q-record by the end of the decade

Postby crowberry » Fri Apr 25, 2014 4:26 pm


rcain
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Re: JET will attempt Q-record by the end of the decade

Postby rcain » Sat May 03, 2014 2:47 am

WHOOT! up the Brits! (bet we blow ourselves up in the attempt, the germans will make it actually work and the yanks will eventually make all the money out of it ;) ).

D Tibbets
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Re: JET will attempt Q-record by the end of the decade

Postby D Tibbets » Sat May 03, 2014 10:36 am

Six years to this test/ demo in a machine that is already working?

I suspect this is a final test with all the knobs turned to Full, after they have exhausted their current research program. It might be more risky, but if it is at the end of the machine lifetime anyway...

It would be perhaps useful, or at least rewarding, if future overhaul of JET is hoped for. This would be especially applicable if ITER development continues to escalate in cost and time delay.


Dan Tibbets
To error is human... and I'm very human.

crowberry
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Re: JET will attempt Q-record by the end of the decade

Postby crowberry » Thu May 08, 2014 3:21 pm


Ivy Matt
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Re: JET will attempt Q-record by the end of the decade

Postby Ivy Matt » Wed Jul 09, 2014 4:40 pm

Temperature, density, confinement time: pick any two.

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Re: JET will attempt Q-record by the end of the decade

Postby 303 » Fri Jul 11, 2014 11:51 pm

http://www.bbc.co.uk/programmes/b047z8wv - Chris Llewellyn Smith

heard this on the wireless the other day , was interesting

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Re: JET will attempt Q-record by the end of the decade

Postby JohnFul » Sat Jul 12, 2014 4:37 am

One of the takeaways I got from my recent visit to NIF was that shaping the power delivered over the period of a shot drastically altered the output or gain from that shot. At NIF, they shoot ~1us laser pulses at a target. The pulse is shaped. It starts out with a certain level of power, then bumps a larger spike, etc., until the final spike at the end of the pulse. You're talking a 20 ft beam that has a unique waveform or "signature". It's all about the waveform that enabled NIF to reach unity in recent tests. How would that translate to jet or ITER where you circle the plasma round in a stew, or is it even possible in that type of design? How would such a concept translate to polywell? Is it possible to shape the magnetic pulse that controls the virtual cathode fast enough to do something like they do at NIF?

crowberry
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Re: JET will attempt Q-record by the end of the decade

Postby crowberry » Sun Jul 13, 2014 4:11 pm


crowberry
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Re: JET will attempt Q-record by the end of the decade

Postby crowberry » Sun Jul 13, 2014 4:42 pm

The early overly optimistic estimates about fusion power generation, false leads and the long time scales involved in building a break even tokamak has lead to the view that fusion is far off in the future. This in turn has decreased the interest of the general public and politicians in fusion as a possible energy source. So far fusion has never had the funding needed to adequately explore different promising ideas. With limited funding most effort has put into the so far best performing concept, the tokamak, to minimize risks in spite of the low beta of tokamaks and associated large scale dimensions, costs and building time. Having any fusion concept demonstrating break even would change the general view on fusion and most likely result in more funding.

The best triple product values have been produced with tokamaks and this is the only reason why they are receiving most of the development effort. If some alternative concept can show break even before JET, then it would changed the field significantly.
The interesting thing to follow the next few years is whether LPP, General Fusion, Helion Energy, Sorlox or Lockheed Martin can beat JET.

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Re: JET will attempt Q-record by the end of the decade

Postby krenshala » Mon Jul 14, 2014 4:28 pm


Skipjack
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Re: JET will attempt Q-record by the end of the decade

Postby Skipjack » Mon Jul 14, 2014 5:56 pm


crowberry
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Re: JET will attempt Q-record by the end of the decade

Postby crowberry » Mon Jul 14, 2014 7:51 pm


Skipjack
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Re: JET will attempt Q-record by the end of the decade

Postby Skipjack » Mon Jul 14, 2014 8:29 pm


crowberry
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Re: JET will attempt Q-record by the end of the decade

Postby crowberry » Sat Jul 04, 2015 11:31 am


D Tibbets
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Re: JET will attempt Q-record by the end of the decade

Postby D Tibbets » Sun Jul 05, 2015 3:42 am

Another question is what are they changing from previous tests. Higher temperatures, higher B fields, better control of edge instabilities, Beta pushed a little further.... ? Do they hope to reach ignition ?

Dan Tibbets
To error is human... and I'm very human.


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