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Review of Scientific Instruments / Volume 79 / Issue 10 / PARTICLE SOURCES, OPTICS AND ACCELERATION; PARTICLE DETECTORS

Rev. Sci. Instrum. 79, 103301 (2008); http://dx.doi.org/10.1063/1.3005485 (5 pages)

Generation and dose distribution measurement of flash x-ray in KALI-5000 system

Rakhee Menon, Amitava Roy, S. Mitra, A. Sharma, J. Mondal, K. C. Mittal, K. V. Nagesh, and D. P. Chakravarthy

Accelerator and Pulse Power Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400 085, India

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(Received 26 August 2008; accepted 1 October 2008; published online 27 October 2008)

Flash x-ray generation studies have been carried out in KALI-5000 Pulse power system. The intense relativistic electron beam has been bombarded on a tantalum target at anode to produce flash x-ray via bremsstrahlung conversion. The typical electron beam parameter was 360 kV, 18 kA, and 100 ns, with a few hundreds of A/cm2 current density. The x-ray dose has been measured with calcium sulfate:dysposium (CaSO4:Dy) thermoluminescent dosimeter and the axial dose distribution has been characterized. It has been observed that the on axis dose falls of with distance ∼ 1/xn, where n varies from 1.8 to 1.85. A maximum on axis dose of 46 mrad has been measured at 1 m distance from the source. A plastic scintillator with optical fiber coupled to a photomultiplier tube has been developed to measure the x-ray pulse width. The typical x-ray pulse width varied from 50 to 80 ns.

© 2008 American Institute of Physics

Article Outline

  1. INTRODUCTION
  2. EXPERIMENTAL SETUP AND DIAGNOSTICS
    1. X-ray diode
    2. Dose measurements
    3. Dose distribution from x-ray films
    4. Pulse width measurement with plastic (scintillator+optical fiber+PMT) setup
  3. EXPERIMENTAL RESULTS
  4. CONCLUSION

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KEYWORDS and PACS

Keywords

bremsstrahlung, calcium compounds, dosimetry, dysprosium, photomultipliers, relativistic electron beams, scintillation counters, tantalum, thermoluminescence, X-ray production

PACS

  • 07.85.Fv

    X- and γ-ray sources, mirrors, gratings, and detectors

  • 41.75.Ht

    Relativistic electron and positron beams

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3005485

PUBLICATION DATA

ISSN

0034-6748 (print)  
1089-7623 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

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    T. J. Nash, M. S. Derzon, G. A. Chandler, D. L. Fehl, R. J. Leeper, J. L. Porter, R. B. Spielman, C. Ruiz, G. Cooper, J. McGurn, M. Hurst, D. Jobe, J. Torres, J. Seaman, K. , S. Lazier, T. Gilliland, L. A. Ruggles, W. A. Simpson, R. Adams, J. A. Seaman, D. Wenger, D. Nielsen, P. Riley, R. French, B. Stygar, T. Wagoner, T. W. L. Sanford, R. Mock, J. Asay, C. Hall, M. Knudson, J. Armijo, J. McKenney, R. Hawn, D. Schroen-Carey, D. Hebron, T. Cutler, S. Dropinski, C. Deeney, P. D. LePell, C. A. Coverdale, M. Douglas, M. Cuneo, D. Hanson, J. E. Bailey, P. Lake, A. Carlson, C. Wakefield, J. Mills, J. Slopek, and T. Dinwoodie, Rev. Sci. Instrum. 72, 1167 (2001)RSINAK000072000001001167000001.

    A. Roy, R. Menon, S. Mitra, D. D. P. Kumar, S. Kumar, A. Sharma, K. C. Mittal, K. V. Nagesh, and D. P. Chakravarthy, J. Appl. Phys. 103, 014905 (2008)JAPIAU000103000001014905000001.

    J. Mondal, D. D. P. Kumar, A. Roy, S. Mitra, A. Sharma, S. K. Singh, G. V. Rao, K. C. Mittal, K. V. Nagesh, and D. P. Chakravarthy, J. Appl. Phys. 101, 034905 (2007)JAPIAU000101000003034905000001.

    A. Roy, J. Mondal, R. Menon, S. Mitra, D. D. P. Kumar, A. Sharma, K. C. Mittal, K. V. Nagesh, and D. P. Chakravarthy, J. Appl. Phys. 102, 064902 (2007)JAPIAU000102000006064902000001.


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