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Title: A 10{sup 9} neutrons/pulse transportable pulsed D-D neutron source based on flexible head plasma focus unit

Abstract

A 17 kJ transportable plasma focus (PF) device with flexible transmission lines is developed and is characterized. Six custom made capacitors are used for the capacitor bank (CB). The common high voltage plate of the CB is fixed to a centrally triggered spark gap switch. The output of the switch is coupled to the PF head through forty-eight 5 m long RG213 cables. The CB has a quarter time-period of 4 μs and an estimated current of 506 kA is delivered to the PF device at 17 kJ (60 μF, 24 kV) energy. The average neutron yield measured using silver activation detector in the radial direction is (7.1 ± 1.4) × 10{sup 8} neutrons/shot over 4π sr at 5 mbar optimum D{sub 2} pressure. The average neutron yield is more in the axial direction with an anisotropy factor of 1.33 ± 0.18. The average neutron energies estimated in the axial as well as in the radial directions are (2.90 ± 0.20) MeV and (2.58 ± 0.20) MeV, respectively. The flexibility of the PF head makes it useful for many applications where the source orientation and the location are important factors. The influence of electromagnetic interferences from the CB as wellmore » as from the spark gap on applications area can be avoided by putting a suitable barrier between the bank and the PF head.« less

Authors:
; ; ; ;  [1]
  1. Applied Physics Division, Bhabha Atomic Research Centre, Mumbai 400 085 (India)
Publication Date:
OSTI Identifier:
22597081
Resource Type:
Journal Article
Journal Name:
Review of Scientific Instruments
Additional Journal Information:
Journal Volume: 87; Journal Issue: 3; Other Information: (c) 2016 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0034-6748
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; ACTIVATION DETECTORS; ANISOTROPY; CABLES; CAPACITORS; ELECTRIC POTENTIAL; FLEXIBILITY; MEV RANGE 01-10; NEUTRON SOURCES; NEUTRONS; PLASMA FOCUS; PULSES; SILVER; SPARK GAPS; SWITCHES

Citation Formats

Niranjan, Ram, E-mail: niranjan@barc.gov.in, Rout, R. K., Srivastava, R., Kaushik, T. C., and Gupta, Satish C. A 10{sup 9} neutrons/pulse transportable pulsed D-D neutron source based on flexible head plasma focus unit. United States: N. p., 2016. Web. doi:10.1063/1.4942666.
Niranjan, Ram, E-mail: niranjan@barc.gov.in, Rout, R. K., Srivastava, R., Kaushik, T. C., & Gupta, Satish C. A 10{sup 9} neutrons/pulse transportable pulsed D-D neutron source based on flexible head plasma focus unit. United States. doi:10.1063/1.4942666.
Niranjan, Ram, E-mail: niranjan@barc.gov.in, Rout, R. K., Srivastava, R., Kaushik, T. C., and Gupta, Satish C. Tue . "A 10{sup 9} neutrons/pulse transportable pulsed D-D neutron source based on flexible head plasma focus unit". United States. doi:10.1063/1.4942666.
@article{osti_22597081,
title = {A 10{sup 9} neutrons/pulse transportable pulsed D-D neutron source based on flexible head plasma focus unit},
author = {Niranjan, Ram, E-mail: niranjan@barc.gov.in and Rout, R. K. and Srivastava, R. and Kaushik, T. C. and Gupta, Satish C.},
abstractNote = {A 17 kJ transportable plasma focus (PF) device with flexible transmission lines is developed and is characterized. Six custom made capacitors are used for the capacitor bank (CB). The common high voltage plate of the CB is fixed to a centrally triggered spark gap switch. The output of the switch is coupled to the PF head through forty-eight 5 m long RG213 cables. The CB has a quarter time-period of 4 μs and an estimated current of 506 kA is delivered to the PF device at 17 kJ (60 μF, 24 kV) energy. The average neutron yield measured using silver activation detector in the radial direction is (7.1 ± 1.4) × 10{sup 8} neutrons/shot over 4π sr at 5 mbar optimum D{sub 2} pressure. The average neutron yield is more in the axial direction with an anisotropy factor of 1.33 ± 0.18. The average neutron energies estimated in the axial as well as in the radial directions are (2.90 ± 0.20) MeV and (2.58 ± 0.20) MeV, respectively. The flexibility of the PF head makes it useful for many applications where the source orientation and the location are important factors. The influence of electromagnetic interferences from the CB as well as from the spark gap on applications area can be avoided by putting a suitable barrier between the bank and the PF head.},
doi = {10.1063/1.4942666},
journal = {Review of Scientific Instruments},
issn = {0034-6748},
number = 3,
volume = 87,
place = {United States},
year = {2016},
month = {3}
}