Neutron Yield Scaling With Inductance in Plasma Focus

Author

Karami, Fereshteh ; Roshan, Mahmud V. ; Habibi, Morteza ; Asadnejad, Reza ; Lee, Paul ; SorHeoh Saw ; Sing Lee

Author_Institution

Dept. of Energy Eng. & Phys., Amirkabir Univ. of Technol., Tehran, Iran

Volume

43

Issue

7

fYear

2015

fDate

7/1/2015 12:00:00 AM

Firstpage

2155

Lastpage

2159

Abstract

Neutron yield is enhanced by reduction of the short-circuit plasma focus inductance L₀, which in turn increases the pinch current I_pinch. Numerical experiments are carried out to optimize the neutron production using the Lee model on small plasma focus devices (several kilojoules), such as UNU/ICTP PFF, NX2, and LDiana. The maximum neutron yield is obtained for each L₀ with a combination of gas pressure as well as anode length and radius (Y_n versus z₀, p₀ and a at fixed L₀). The numerical experiments confirm the limitation effect of I_pinch, and suggest an optimum L₀ in the range of 10-20 nH. Finally, the neutron yield is scaled with system inductance.

Keywords

inductance; neutron production; numerical analysis; optimisation; pinch effect; plasma focus; Lee model; anode length; anode radius; gas pressure; neutron production optimization; neutron yield scaling; numerical experiments; pinch current; short-circuit plasma focus inductance reduction; Computational modeling; Inductance; Neutrons; Numerical models; Plasma measurements; Plasmas; X-rays; Inductance; neutrons; plasma focus;

fLanguage

English

Journal_Title

Plasma Science, IEEE Transactions on

Publisher

ieee

ISSN

0093-3813

Type

jour

DOI

10.1109/TPS.2015.2440335

Filename

7151896