Numerical Experiments on Soft X-ray Emission Optimization of Nitrogen Plasma in 3 kJ Plasma Focus SY-1 Using Modified Lee Model |
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Authors: | M Akel Sh Al-Hawat S Lee |
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Affiliation: | (1) Department of Physics, Atomic Energy Commission, P.O. Box 6091, Damascus, Syria;(2) Institute for Plasma Focus Studies, 32 Oakpark Drive, Chadstone, VIC, 3148, Australia;(3) National Institute of Education, Nanyang Technological University, Singapore, 637616, Singapore;(4) INTI International University College, 71800 Nilai, Malaysia |
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Abstract: | The X-ray emission properties of nitrogen plasmas are numerically investigated using corona plasma equilibrium model. The
X-ray emission intensities of nitrogen Ly
α
, Ly
β
and He
α
, He
β
lines are calculated. The optimum plasma temperature for nitrogen X-ray output is concluded to be around 160 eV. The Lee
model is modified to include nitrogen in addition to other gasses (H2, D2, He, Ne, Ar, Xe). It is then applied to characterize the 2.8 kJ plasma focus PF-SY1, finding a nitrogen soft X-ray yield
(Ysxr) of 8.7 mJ in its typical operation. Keeping the bank parameters and operational voltage unchanged but systematically
changing other parameters, numerical experiments were performed finding the optimum combination of pressure = 0.09 Torr, anode
length = 7.2 cm and anode radius = 2.58 cm. The optimum Ysxr was 64 mJ. Thus we expect to increase the nitrogen Ysxr of PF-SY1
sevenfold from its present typical operation; without changing the capacitor bank, merely by changing the electrode configuration
and operating pressure. |
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Keywords: | |
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