Generation and dose distribution measurement of flash x-ray in KALI-5000 system.
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 approximately 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.
Menon
Rakhee
R
Accelerator and Pulse Power Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400 085, India. rakheemk@barc.gov.in
Roy
Amitava
A
Mitra
S
S
Sharma
A
A
Mondal
J
J
Mittal
K C
KC
Nagesh
K V
KV
Chakravarthy
D P
DP