Z-Pinch Renaissance

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

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williatw
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Re: Z-Pinch Renaissance

Postby williatw » Mon Aug 26, 2019 4:37 pm

Last edited by williatw on Mon Aug 26, 2019 5:26 pm, edited 1 time in total.

Skipjack
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Re: Z-Pinch Renaissance

Postby Skipjack » Mon Aug 26, 2019 4:47 pm

I don't want to have this thread drift too much off topic. I just want to add that I love MSNW's Fusion Driven Rocket design. I think it is amazing, since it does get a lot of thrust and has none of the problems you mentioned. I am not sure about the temperature problems of the Z- Pinch design. As for being mature. It seems that the SFS Z- Pinch is developing really quickly and the potential is huge. Meanwhile the FDR has seen very little funding in recent years and it is very different from Helion's Fusion Engine design (which has been making great progress). So I am not sure whose approach is more "doable". I think both have merit and both should be looked into.
What excites me about the Z- Pinch approach is that it has (indirect) funding through ZAP's work and it could have a very high T/W ratio, which is also important.

Giorgio
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Re: Z-Pinch Renaissance

Postby Giorgio » Mon Aug 26, 2019 5:34 pm

Same feelings. I guess that before the end of the year we should know more.
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Skipjack
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Re: Z-Pinch Renaissance

Postby Skipjack » Wed Sep 25, 2019 1:14 am

Last edited by Skipjack on Fri Oct 11, 2019 1:13 pm, edited 1 time in total.

Giorgio
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Re: Z-Pinch Renaissance

Postby Giorgio » Wed Sep 25, 2019 2:21 am

This is just published and related to FuZe investigation and characterization of the produced neutron flux:

"Measurements of temporally- and spatially-resolved neutron production in a sheared-flow stabilized Z-pinch"


Unfortunately is behind a paywall, so I couldn't read it.



Abstract

A novel approach using multiple scintillator detectors is applied to measure temporally- and spatially-resolved neutron production in the Fusion Z-pinch Experiment (FuZE) device, a Sheared-Flow Stabilized (SFS) Z-pinch. Diagnosing neutron production from FuZE is important for determining if fusion is thermonuclear and whether the FuZE device can be scaled toward reactor conditions. Absolute yields of up to 2 × 10^5 neutrons per discharge are measured with calibrated plastic scintillator detectors operating in pulse-counting mode.
Neutron emission durations of up to ~8 us are inferred by recording the time difference between the first and last pulses for each discharge. Multiple scintillator detectors located at different positions with respect to the fusing plasma are used to demonstrate that the axial extent of the neutron producing region is comparable to the device volume. Scintillator detectors are well-suited as neutron diagnostics for FuZE and other plasma devices with similar yields and emission durations. Increasing the neutron yield, duration, and volume of the neutron emitting region within the plasma column are significant experimental objectives for FuZE.
A society of dogmas is a dead society.

Skipjack
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Re: Z-Pinch Renaissance

Postby Skipjack » Wed Sep 25, 2019 3:33 pm


Giorgio
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Re: Z-Pinch Renaissance

Postby Giorgio » Wed Sep 25, 2019 5:16 pm

A society of dogmas is a dead society.

Skipjack
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Re: Z-Pinch Renaissance

Postby Skipjack » Wed Sep 25, 2019 11:50 pm

From what I have seen, they are already at 300kA with the current setup, but they need to upgrade the power supply for 400 kA.

Giorgio
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Re: Z-Pinch Renaissance

Postby Giorgio » Thu Sep 26, 2019 8:01 am

A society of dogmas is a dead society.

Skipjack
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Re: Z-Pinch Renaissance

Postby Skipjack » Thu Sep 26, 2019 8:22 pm


Giorgio
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Re: Z-Pinch Renaissance

Postby Giorgio » Fri Sep 27, 2019 4:15 am

A society of dogmas is a dead society.

AcesHigh
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Re: Z-Pinch Renaissance

Postby AcesHigh » Tue Oct 01, 2019 3:43 pm


daveklingler
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Re: Z-Pinch Renaissance

Postby daveklingler » Tue Oct 01, 2019 6:24 pm


Skipjack
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Re: Z-Pinch Renaissance

Postby Skipjack » Tue Oct 01, 2019 7:20 pm


Giorgio
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Re: Z-Pinch Renaissance

Postby Giorgio » Wed Oct 02, 2019 2:07 am

The numbers are probably right, but according the way of working of the FuZe reactor is seems more to be an "Impulse ISP" than a prolonged time working engine ISP.
If you get a shot every 10 seconds it still is a pretty impressive ISP value for space application, but nowhere useful to get out of earth gravity well.
A society of dogmas is a dead society.


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