Intense relativistic electron beam generation and prepulse effect in high power cylindrical diode

Journal Article · Tue Jan 01 04:00:00 EST 2008 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.2828142· OSTI ID:21064503

Roy, Amitava; Menon, R; Mitra, S; Kumar, D D. P.; Kumar, Senthil; Sharma, Archana; Mittal, K C; Nagesh, K V; Chakravarthy, D P ^[1]

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1. Accelerator and Pulse Power Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400 085 (India)

Intense gigawatt relativistic electron beam has been generated in a high power cylindrical diode in the presence of prepulse. A bipolar prepulse voltage, recorded at the diode, varies both in amplitude and time duration with the Marx generator voltage. It was found that only at the accelerating gap {<=}1.65 cm there is some shot to shot variation in the diode voltage and current for the same Marx generator voltage. The anode and cathode plasma expansion velocities were calculated using the perveance data. The plasma expands at 5 cm/{mu}s for 1.85 cm radial anode-cathode gap and the plasma velocity decreases for smaller gap. It was found that the effect of the prepulse is less pronounced in the cylindrical diode as compared to planar diode that allows one operation of the cylindrical diode with the gap {<=}1.85 cm.

• OSTI ID: 21064503
• Journal Information: Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 1 Vol. 103; ISSN JAPIAU; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ANODES
CATHODES
CYLINDRICAL CONFIGURATION
ELECTRIC POTENTIAL
ELECTRON BEAMS
MARX GENERATORS
PLASMA
PLASMA EXPANSION
PLASMA PRODUCTION
RELATIVISTIC RANGE