Global View of the Lee Model code. S H Saw INTI International University, Nilai, Malaysia. 3 kJ Plasma Focus Designed for International Collaboration. Design of the UNU/ICTP PFF- 3kJ Plasma Focus System??. UNU/ICTP PFF- narrow trolley to fit ICTP lift???. The Code.
S H Saw
INTI International University, Nilai, Malaysia
Lo nH Co uF b cm a cm z0 ro mW
33.5 1332 16 11.6 60 6.1
fm fc fmr fcr
0.13 0.7 0.35 0.65
Vo Po Mw A At/Molecular
27 3.5 4 1 2
that their L0 was already at optimum
that lowering their L0 would be a waste of effort and resources
1.03 MA at 20 nH,
1.0 MA at10 nH, and
0.97 MA at 5 nH.
L0 decreases, Ipinch/Ipeak decreases
Capacitor bank is more and more coupled to the inductive energy transfer
Effect is more pronounced at lower L0
Leads to this Limitation Effect
Two basic circuit rules: lead to such complex interplay of factors which was not foreseen; revealed only by extensive numerical experiments
S Lee & S H Saw computed current waveform matches measured (after getting L, J Fusion Energy, 27 292-295 (2008)
S Lee, Plasma Phys. Control. Fusion, 50 (2008) 105005
S H Saw&S Lee.. Nuclear & Renewable Energy Sources Ankara, Turkey, 28 & 29 Sepr 2009.
S Lee Appl Phys Lett 95, 151503 (2009)
Cause: Due to constant dynamic resistance relative to decreasing generator impedance
Global Scaling LawScaling deterioration observed in numerical experiments (small black crosses) compared to measurements on various machines (larger coloured crosses) Neutron ‘saturation’ is more aptly portrayed as a scaling deterioration-Conclusion of IPFS-INTI UC research
(a major test facility for the international programme to build a fusion reactor)
IPFS numerical Experiments:
Improved performance going from 35 kV to 50 kV
Ion beam fluence
Post focus axial shock waves
Anode sputtered material
6a the proven most effective hardware system of the UNU/ICTP PFF with
6b the proven most effective numerical experiment system Lee Model code
with emphasis on dynamics, radiation and materials applications.
(a) Experimental facility: TRPF
1 kJ focus: 10 kV 20 uF 80 nH
Simple materials processing experiments
(b) Numerical Experiments code
To complement TRPF
Connection with reality: through fitting computed current to measured current trace
Behaviour of plasma focus and yields as functions of pressure, gases, storage energies, circuit currents and pinch currents.
Carry out above experiments with any plasma focus.
Optimization of planned plasma focus
The trolley based UNU/ICTP PFF 3 kJ plasma focus training
and research system will be updated as a 1 kJ system