At NIF what is the shape of the 1st stage of the plasma

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Main Question or Discussion Point

Hello all:

I was wondering what is the shape of the plasma at Nif ,is it spherical ?

I start to wonder that it may be spindle shaped ,or fusiform shaped .

Best
H
 

Answers and Replies

  • #2
Astronuc
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https://physicsworld.com/a/giant-lasers-pass-new-milestone-towards-fusion-energy/
The $3.5bn NIF trains 192 pulsed laser beams on to the inner surface of a centimetre-long hollow metal cylinder known as a hohlraum. Inside is a fuel capsule, which is a roughly 2 mm-diameter hollow sphere containing a thin deuterium-tritium layer. Each pulse lasts just a few nanoseconds and the lasers can deliver about 1.8 MJ of energy. This powerful blast causes the capsule to implode rapidly, creating immense temperatures and pressures inside a central “hot spot”, where fusion reactions occur.
https://lasers.llnl.gov/workshops/science_of_ignition/pdfs/science_of_fusion_ignition_on_NIF.pdfSee - 3.4.3 Hotspot formation and fuel-shape physics, pp. 35-36
 
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