Optimization of the high pressure operation regime for enhanced neutron yield in a plasma focus device

被引：78

作者：

Koh, JM ^{[1
]}

Rawat, RS ^{[1
]}

Patran, A ^{[1
]}

Zhang, T ^{[1
]}

Wong, D ^{[1
]}

Springham, SV ^{[1
]}

Tan, TL ^{[1
]}

Lee, S ^{[1
]}

Lee, P ^{[1
]}

机构：

[1] Nanyang Technol Univ, Nat Sci Acad Grp, Natl Inst Educ, Singapore 637616, Singapore

来源：

PLASMA SOURCES SCIENCE & TECHNOLOGY | 2005年 / 14卷 / 01期

关键词：

D O I：

10.1088/0963-0252/14/1/002

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

The average total neutron yield is measured, using an indium foil activation detector, at various combinations of filling gas pressures (including the higher pressure operation regime) of deuterium, capacitor bank charging voltages, anode lengths and insulator sleeve lengths to optimize the neutron yield from the NX2 Plasma Focus device. A remarkable six-fold increase in the average maximum total neutron yield, to a record value of (7 +/- 1) x 10(8) neutrons per shot, compared to the similar energy UNU-ICTP Plasma Focus device is achieved for deuterium at a relatively much higher filling gas pressure of 20 mbar. The average peak neutron energy for the axial direction (0 degrees), radial direction (90 degrees) and backward direction (180 degrees) is estimated to be 2.89 +/- 0.25 MeV, 2.49 +/- 0.20 MeV and 2.11 +/- 0.12 MeV, respectively. The average forward to radial neutron yield anisotropy is found to be 1.46 +/- 0.28. The neutron energy and anisotropy measurements suggest that the neutron production mechanism may be predominantly beam target.

引用

页码：12 / 18

页数：7

共 31 条

[1] PRODUCTION AND DIAGNOSTIC MEASUREMENTS OF KILOVOLT HIGH-DENSITY DEUTERIUM HELIUM AND NEON PLASMAS [J].

BECKNER, EH .

JOURNAL OF APPLIED PHYSICS, 1966, 37 (13) :4944-&

[2]

BECKNER EH, 1967, REV SCI INSTRUM, V38, P307

[3]

Beg F. N., 1992, Modern Physics Letters B, V6, P593, DOI 10.1142/S0217984992000685

[4] Table-top neutron source for characterization and calibration of dark matter detectors [J].

Beg, FN ;

Krushelnick, K ;

Gower, C ;

Torn, S ;

Dangor, AE ;

Howard, A ;

Sumner, T ;

Bewick, A ;

Lebedenko, V ;

Dawson, J ;

Davidge, D ;

Joshi, M ;

Gillespie, JR .

APPLIED PHYSICS LETTERS, 2002, 80 (16) :3009-3011

[5]

BERNARD A, 1976, 3 TROP C PULS HIGH B

[6] EVIDENCE FOR NONTHERMONUCLEAR NEUTRON PRODUCTION IN A PLASMA FOCUS DISCHARGE [J].

BERNSTEIN, MJ ;

HAI, F .

PHYSICS LETTERS A, 1970, A 31 (06) :317-+

[7] SPACE, TIME, AND ENERGY DISTRIBUTIONS OF NEUTRONS AND X RAYS FROM A FOCUSED PLASMA DISCHARGE [J].

BERNSTEIN, MJ ;

MESKAN, DA ;

VANPAASS.HL .

PHYSICS OF FLUIDS, 1969, 12 (10) :2193-+

[8] NEUTRONICS OF A DENSE-PLASMA FOCUS - INVESTIGATION OF A FUSION PLASMA [J].

CLOTH, P ;

CONRADS, H .

NUCLEAR SCIENCE AND ENGINEERING, 1977, 62 (04) :591-600

[9] MEASUREMENT OF ION TEMPERATURE IN DENSE-PLASMA FOCUS BY LASER-BEAM SCATTERING [J].

FORREST, MJ ;

PEACOCK, NJ .

PLASMA PHYSICS AND CONTROLLED FUSION, 1974, 16 (06) :489-498

[10]

HO PY, 2003, P 30 EPS C CONTR FUS

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