Catalytic action of {beta} source on x-ray emission from plasma focus

doi:10.1063/1.2162451

Title: Catalytic action of {beta} source on x-ray emission from plasma focus

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Abstract

The influence of preionization around the insulator sleeve by a mesh-type {beta} source ({sub 28}Ni{sup 63}) for the x-ray emission from a (2.3-3.9 kJ) plasma focus device is investigated. Quantrad Si p-i-n diodes along with suitable filters are employed as time-resolved x-ray detectors and a multipinhole camera with absorption filters is used for time-integrated analysis. X-ray emission in 4{pi} geometry is measured as a function of argon and hydrogen gas filling pressures with and without {beta} source at different charging voltages. It is found that the pressure range for the x-ray emission is broadened, x-ray emission is enhanced, and shot to shot reproducibility is improved with the {beta} source. With argon, the Cu K{alpha} emission is estimated to be 27.14 J with an efficiency of 0.7% for {beta} source and 21.5 J with an efficiency of 0.55% without {beta} source. The maximum x-ray yield in 4{pi} geometry is found to be about 68.90 J with an efficiency of 1.8% for {beta} source and 54.58 J with an efficiency of 1.4% without {beta} source. With hydrogen, Cu K{alpha} emission is 11.82 J with an efficiency of 0.32% for {beta} source and 10.07 J with an efficiency of 0.27% without {beta} source.more »« less

Authors:

Ahmad, S.; Sadiq, Mehboob; Hussain, S.; Shafiq, M.; Zakaullah, M.; Waheed, A. ^[1]; Department of Physics, University of Sargodha, Sargodha ^[2]; Department of Physics, Quaid-i-Azam University, 45320 Islamabad ^[2]; PINSTECH, P.O. Box 1331, 44000 Islamabad ^[2]

Department of Physics, Quaid-i-Azam University, 45320 Islamabad (Pakistan)
(Pakistan)

Publication Date:: Sun Jan 15 00:00:00 EST 2006

OSTI Identifier:: 20778558

Resource Type:: Journal Article

Resource Relation:: Journal Name: Review of Scientific Instruments; Journal Volume: 77; Journal Issue: 1; Other Information: DOI: 10.1063/1.2162451; (c) 2006 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)

Country of Publication:: United States

Language:: English

Subject:: 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ANODES; ARGON; CAMERAS; EFFICIENCY; ELECTRIC POTENTIAL; EMISSION; GEOMETRY; HYDROGEN; PLASMA; PLASMA FOCUS; PLASMA FOCUS DEVICES; TIME RESOLUTION; X RADIATION; X-RAY SOURCES; YIELDS

Citation Formats


                    Ahmad, S., Sadiq, Mehboob, Hussain, S., Shafiq, M., Zakaullah, M., Waheed, A., Department of Physics, University of Sargodha, Sargodha, Department of Physics, Quaid-i-Azam University, 45320 Islamabad, and PINSTECH, P.O. Box 1331, 44000 Islamabad. Catalytic action of {beta} source on x-ray emission from plasma focus.  United States: N. p., 2006. 
        Web.  doi:10.1063/1.2162451.

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                    Ahmad, S., Sadiq, Mehboob, Hussain, S., Shafiq, M., Zakaullah, M., Waheed, A., Department of Physics, University of Sargodha, Sargodha, Department of Physics, Quaid-i-Azam University, 45320 Islamabad, & PINSTECH, P.O. Box 1331, 44000 Islamabad. Catalytic action of {beta} source on x-ray emission from plasma focus.  United States.  doi:10.1063/1.2162451.

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                    Ahmad, S., Sadiq, Mehboob, Hussain, S., Shafiq, M., Zakaullah, M., Waheed, A., Department of Physics, University of Sargodha, Sargodha, Department of Physics, Quaid-i-Azam University, 45320 Islamabad, and PINSTECH, P.O. Box 1331, 44000 Islamabad. Sun .  
        "Catalytic action of {beta} source on x-ray emission from plasma focus".  United States.  
        doi:10.1063/1.2162451.

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@article{osti_20778558,

  title        = {Catalytic action of {beta} source on x-ray emission from plasma focus},

  author       = {Ahmad, S. and Sadiq, Mehboob and Hussain, S. and Shafiq, M. and Zakaullah, M. and Waheed, A. and Department of Physics, University of Sargodha, Sargodha and Department of Physics, Quaid-i-Azam University, 45320 Islamabad and PINSTECH, P.O. Box 1331, 44000 Islamabad},

  abstractNote = {The influence of preionization around the insulator sleeve by a mesh-type {beta} source ({sub 28}Ni{sup 63}) for the x-ray emission from a (2.3-3.9 kJ) plasma focus device is investigated. Quantrad Si p-i-n diodes along with suitable filters are employed as time-resolved x-ray detectors and a multipinhole camera with absorption filters is used for time-integrated analysis. X-ray emission in 4{pi} geometry is measured as a function of argon and hydrogen gas filling pressures with and without {beta} source at different charging voltages. It is found that the pressure range for the x-ray emission is broadened, x-ray emission is enhanced, and shot to shot reproducibility is improved with the {beta} source. With argon, the Cu K{alpha} emission is estimated to be 27.14 J with an efficiency of 0.7% for {beta} source and 21.5 J with an efficiency of 0.55% without {beta} source. The maximum x-ray yield in 4{pi} geometry is found to be about 68.90 J with an efficiency of 1.8% for {beta} source and 54.58 J with an efficiency of 1.4% without {beta} source. With hydrogen, Cu K{alpha} emission is 11.82 J with an efficiency of 0.32% for {beta} source and 10.07 J with an efficiency of 0.27% without {beta} source. The maximum x-ray yield in 4{pi} geometry is found to be 30.20 J with an efficiency of 0.77% for {beta} source and 25.58 J with an efficiency of 0.6% without {beta} source. The x-ray emission with Pb insert at the anode tip without {beta} source is also investigated and found to be reproducible and significantly high. The maximum x-ray yield is estimated to be 46.6 J in 4{pi} geometry with an efficiency of 1.4% at 23 kV charging voltage. However, degradation of x-ray yield is observed when charging voltage exceeds 23 kV for Pb insert. From pinhole images it is observed that the x-ray emission due to the bombardment of electrons at the anode tip is dominant in both with and without {beta} source.},

  doi          = {10.1063/1.2162451},

  journal      = {Review of Scientific Instruments},

  number       = 1,

  volume       = 77,

  place        = {United States},

  year         = {Sun Jan 15 00:00:00 EST 2006},

  month        = {Sun Jan 15 00:00:00 EST 2006}

}

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DOI: 10.1063/1.2162451

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Mechanism for the x-ray and neutron emission from the plasma focus of a pulsed coaxial accelerator

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X-ray emission from a 2.3-5.3 kJ Mather-type plasma focus [Phys. Fluids 7, 5 (1964)] employing copper, molybdenum, and tungsten anode tip is studied. Argon is used as a working gas. Characteristic Cu K{alpha} and Mo K-series emission and their ratio to the continuous x-rays are determined. From the variation of the x-ray yield data with filling pressure at different charging voltages, scaling laws are obtained. X-ray pinhole images demonstrate that a significant amount of x-ray emission is from the anode tip. The comparison of the ratio of characteristic to continuum radiation for copper anode with typical x-ray tube data revealsmore »« less
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