Optimizing UNU/ICTP PFF Plasma Focus for Neon Soft X-ray Operation
The United Nations University/International Centre for Theoretical Physics Plasma Focus Facility (UNU/ICTP PFF), a 3.3-kJ plasma focus, was designed for operation in deuterium with a speed factor S such that the axial run-down time matches the current rise time at an end axial speed of nearly 10...
Saved in:
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
IEEE
2009
|
| Subjects: | |
| Online Access: | http://eprints.intimal.edu.my/271/1/1.pdf http://eprints.intimal.edu.my/271/ |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Summary: | The United Nations University/International Centre
for Theoretical Physics Plasma Focus Facility (UNU/ICTP PFF),
a 3.3-kJ plasma focus, was designed for operation in deuterium
with a speed factor S such that the axial run-down time matches
the current rise time at an end axial speed of nearly 10 cm/μs. For
operation in neon, we first consider that a focus pinch temperature
between 200 and 500 eV may be suitable for a good yield of
neon soft X-rays, which corresponds to an end axial speed of
6–7 cm/μs. On this basis, for operation in neon, the standard
UNU/ICTP PFF needs to have its anode length z0 reduced by
some 30%–40% to maintain the time matching. Numerical experiments
using the Lee model code are carried out to determine
the optimum configuration of the electrodes for the UNU/ICTP
PFF capacitor system. The results show that an even more drastic
shortening of anode length z0 is required, from the original 16
to 7 cm, at the same time, increasing the anode radius “a” from
0.95 to 1.2 cm, to obtain an optimum yield of Ysxr = 9.5 J.
This represents a two- to threefold increase in the Ysxr from that
computed for the standard UNU/ICTP PFF. |
|---|