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

被引:17
|
作者
Menon, Rakhee [1 ]
Roy, Amitava [1 ]
Mitra, S. [1 ]
Sharma, A. [1 ]
Mondal, J. [1 ]
Mittal, K. C. [1 ]
Nagesh, K. V. [1 ]
Chakravarthy, D. P. [1 ]
机构
[1] Bhabha Atom Res Ctr, Accelerator & Pulse Power Div, Bombay 400085, Maharashtra, India
来源
REVIEW OF SCIENTIFIC INSTRUMENTS | 2008年 / 79卷 / 10期
关键词
bremsstrahlung; calcium compounds; dosimetry; dysprosium; photomultipliers; relativistic electron beams; scintillation counters; tantalum; thermoluminescence; X-ray production;
D O I
10.1063/1.3005485
中图分类号
TH7 [仪器、仪表];
学科分类号
0804 ; 080401 ; 081102 ;
摘要
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/cm(2) current density. The x-ray dose has been measured with calcium sulfate:dysposium (CaSO(4):Dy) thermoluminescent dosimeter and the axial dose distribution has been characterized. It has been observed that the on axis dose falls of with distance similar to 1/x(n), 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.
引用
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页数:5
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