Title :
Smaller spot size Flash X-ray generation from KALI 5000 system
Author :
Menon, Rakhee ; Roy, Amitava ; Mitra, Sabyasachi ; Kumar, Senthil ; Sharma, Vishnu ; Sharma, Archana ; Nagesh, K.V. ; Chakravarthy, D.P.
Author_Institution :
Accel. & Pulse Power Div., Bhabha Atomic Res. Centre, Mumbai, India
Abstract :
A Flash X-ray diode has been designed and developed for generation of single shot, nanosecond duration x-rays from KALI-5000 Pulse Power System (0.8-1 MV, 40 kA, 100 ns). The typical electron beam parameter was 500 kV, 8 kA, 100 ns, with a few hundreds of A/cm current density. The spot size for different diode configurations varied from 4 mm to 2 mm. X-ray radiograph of various metal objects were taken on X-ray films. The diode voltage and current waveforms were analyzed with the space-charge limited flow model. The anode and cathode plasma expansion velocities were calculated using the perveance data and varies from 2.5-3.3 cm/μs. Time integrated x-ray dose was measured using pen dosemeter and the on-axis dose was 10 mR at 1m distance from the window. The radiograph of stainless steel objects shows good resolution.
Keywords :
current density; dosimeters; plasma X-ray sources; pulsed power technology; radiography; stainless steel; KALI 5000 pulse power system; X-ray radiograph; anode plasma expansion velocity; cathode plasma expansion velocity; current 40 kA; current 8 kA; current density; current waveforms; diode voltage; flash X-ray diode; flash X-ray generation; pen dosemeter; space-charge limited flow model; spot size; stainless steel; voltage 0.8 MV to 1 MV; voltage 500 kV; Anodes; Cathodes; Electron beams; Films; Plasmas; Radiography; Transmission line measurements; flash x-ray radiography; industrial diode; plasma expansion velocity;
Conference_Titel :
Vacuum Electronics Conference (IVEC), 2011 IEEE International
Conference_Location :
Bangalore
Print_ISBN :
978-1-4244-8662-5
DOI :
10.1109/IVEC.2011.5746869
