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