Pinch Current and Soft X-Ray Yield Limitations by Numerical Experiments on Nitrogen Plasma Focus

<p>In this work we have simulated two different sizes of plasma focus devices: PF400, a small sub-kJ plasma focus device in operation at the Atomic Energy Commission in Chile and PF1000, a 1 MJ device at the International Centre for Dense Magnetised Plasmas (ICDMP) in Warsaw, Poland. Our aim is to compare the plasma dynamics observed in two different sizes of the devices. We compare the experimentally obtained data with the data predicted from our numerical experiments using the Lee model code. It has been observed that the peak current of the total current waveform, pinch current calculated from total current, and neutron yield agree reasonably well with published experimental data, however, slight differences are found in other parameters.</p><p>Journal of Nepal Physical Society Vol.3(1) 2015: 55-59</p>

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Numerical experiments on plasma focus neon soft x-ray scaling

Plasma Physics and Controlled Fusion ◽

10.1088/0741-3335/51/10/105013 ◽

2009 ◽

Vol 51 (10) ◽

pp. 105013 ◽

Cited By ~ 46

Author(s):

S Lee ◽

S H Saw ◽

P Lee ◽

R S Rawat

Keyword(s):

Plasma Focus ◽

Numerical Experiments ◽

X Ray

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Numerical experiments on plasma focus pinch current limitation

Plasma Physics and Controlled Fusion ◽

10.1088/0741-3335/50/6/065012 ◽

2008 ◽

Vol 50 (6) ◽

pp. 065012 ◽

Cited By ~ 54

Author(s):

S Lee ◽

P Lee ◽

S H Saw ◽

R S Rawat

Keyword(s):

Plasma Focus ◽

Numerical Experiments ◽

Current Limitation ◽

Pinch Current

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Numerical Experiments on Oxygen Plasma Focus: Scaling Laws of Soft X-Ray Yields

Journal of Fusion Energy ◽

10.1007/s10894-013-9595-z ◽

2013 ◽

Vol 32 (4) ◽

pp. 464-470 ◽

Cited By ~ 1

Author(s):

M. Akel

Keyword(s):

Plasma Focus ◽

Numerical Experiments ◽

Oxygen Plasma ◽

Scaling Laws ◽

X Ray

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Optimization of neon soft X-ray yield in a low-energy dense plasma focus device

Modern Physics Letters B ◽

10.1142/s0217984919500775 ◽

2019 ◽

Vol 33 (07) ◽

pp. 1950077 ◽

Cited By ~ 1

Author(s):

M. A. Malek ◽

M. K. Islam ◽

M. Akel ◽

M. Salahuddin ◽

S. H. Saw ◽

...

Keyword(s):

Plasma Focus ◽

Numerical Experiments ◽

Dense Plasma ◽

Optimum Combination ◽

Theoretical Physics ◽

Lee Model Code ◽

X Ray ◽

Model Code ◽

Yield Formula ◽

Optimum Formula

The modified version of Lee model code is used in numerical experiments for characterizing and optimizing neon soft X-ray yield ([Formula: see text]) of the United Nations University/International Center for Theoretical Physics Plasma Focus Facility (UNU/ICTP PFF) device operated at 14 kV and 30 [Formula: see text]. In our present work, the neon yield [Formula: see text] is improved with an optimized UNU/ICTP PFF device by computing the optimum combination of static inductance ([Formula: see text]), anode length ([Formula: see text]), anode radius ([Formula: see text]) and cathode radius ([Formula: see text]), keeping fixed their ratio ([Formula: see text]) at 3.368, through a lot of numerical experiments at six operating pressures ([Formula: see text]). At lower [Formula: see text] (e.g. 2.0, 2.5 and 3.3 Torr), the optimum [Formula: see text] value, together with the corresponding optimum combination of [Formula: see text], [Formula: see text] and [Formula: see text], is found to be 15 nH, whereas at higher [Formula: see text] (e.g. 4.0, 5.0 and 6.0 Torr), it is obtained as 10 nH. Though the computed maximum neon yield [Formula: see text] (57.2 J with the corresponding efficiency of 1.94%) is found at [Formula: see text], assuming an achievable range of incorporating low-inductance technology, the best optimum combination of [Formula: see text], [Formula: see text], [Formula: see text] and [Formula: see text] is found to be at [Formula: see text], resulting in the computed optimum neon yield [Formula: see text] of 54.60 J with a corresponding efficiency of 1.9%. This computed neon yield [Formula: see text] is about 11 times higher than the measured value [Formula: see text] at optimum [Formula: see text] of UNU/ICTP PFF. It is also observed that our computed neon yield [Formula: see text] is improved by around six times from the previously computed value, which was 9.5 J at the optimum [Formula: see text] Torr for optimum anode configuration of this machine. In addition, neon yield [Formula: see text] is obtained with our optimized combination of [Formula: see text], [Formula: see text], [Formula: see text] and [Formula: see text] at 11.5 kV and compared with the measured neon yield [Formula: see text] of the NX2 machine.

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