Limiting Factors for Liner Implosion in Z Machine Fusion

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SUMMARY

The discussion centers on the limiting factors for liner implosion in Z type machines, specifically regarding the dimensions and gas density within the liners. Participants explore whether larger liners with higher gas pressure could enhance implosion rates, which are critical for achieving significant plasma burn and fusion. Key references include E. Ruskov's work on staged Z-pinches and the physics of fast Z pinches, which provide insights into the relationship between current through liner walls and implosion speed. The compression ratio of the imploding liner is also highlighted as a crucial factor in achieving the necessary conditions for fusion.

PREREQUISITES
  • Understanding of Z-pinch physics
  • Familiarity with inertial confinement fusion concepts
  • Knowledge of gas dynamics and compression ratios
  • Basic principles of plasma physics
NEXT STEPS
  • Research the physics of fast Z pinches and their implications for fusion energy
  • Study E. Ruskov's papers on staged Z-pinches for detailed analyses
  • Examine the relationship between current and implosion speed in liner designs
  • Investigate the effects of gas density and pressure on fusion ignition conditions
USEFUL FOR

Researchers in fusion energy, physicists specializing in plasma dynamics, and engineers involved in the design of inertial confinement systems will benefit from this discussion.

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What is the limiting factor for a liner and it's implosion in a Z type machine?
I wonder have they tried or is it possible to use liners that have a larger radius and contain more gas or gas under higher pressure aka more dense?

Are the dimensions of the liner so small because having a larger liner under the existing power supply would not give a implosion rate fast enough to achieve significant plasma burn and fusion?maybe someone can give a paper or something with formulas that show the relations between current through the liner walls and the wall implosion speed etc?thank you.
 
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Quick, short response:
The physics of fast Z pinches
https://www.osti.gov/servlets/purl/14113

There are plenty of analyses, but many seem to be in journal articles requiring subscription.

One exception:
E. Ruskov, P. Ney, H. U. Rahman
The staged Z-pinch as a potential high-gain fusion energy source: Rebuttal to I. R. Lindemuth et al
https://arxiv.org/abs/1911.09223

Ruskov has his name on several papers.
 
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@Astronuc I'm still finishing reading some other papers but I already got the one on top you linked , so pardon me if I'm asking what is already said in those papers.

Do you happen to know the pressure of D-T gas inside the liner? Assuming it's a 50/50 mixture.
I wonder what is the compression ratio of the imploding liner because the liner compression seems analogous to other forms of mechanical pressure apparatus like a piston and cylinder only with a different geometry.

Would it be fair to say that the key in such inertial confinement techniques is how fast one compresses the fuel to ignition conditions because if the compression is too slow the gas has time to "thermalize" or give of heat to the surroundings and in such escaping the breakeven temp and pressure necessary for any fusion burn?
 

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