Investigations of the radial-electron-beam diode for gas-laser excitation

Journal Article · Sun Jul 01 00:00:00 EDT 1979 · J. Appl. Phys.; (United States)

DOI:https://doi.org/10.1063/1.325577· OSTI ID:6193752

Ramirez, J J; Prestwich, K R

A study has been made of high-power radially converging electron-beam diodes and their application to gas-laser excitation. The REBLE accelerator, built for this study, provided reliable single-shot operation at the 1-MV 180-kA 20-ns level. It is shown that annular-blade cathodes can produce uniform anode current densities at 100--200 A/cm/sup 2/. Apertured-Faraday-cup measurements indicate that the beam is transported readily through the gas. No evidence of microinstabilities in the anode current density were observed. Comparisons of energy-deposition measurements and calculations demonstrate that existing Monte Carlo electron/photon transport codes give an accurate description of the energy deposition when collective effects are not important. Measurements of xenon-excimer radiation excited by the radial electron beam show that 20% of the electron-beam energy deposited in the gas appeared as excimer light. At approx.1600 Torr the radial profile of the emitted radiation was uniform within the +- 10% uncertainty in the measurement.

• Research Organization: Sandia Laboratories, Albuquerque, New Mexico 87185
• OSTI ID: 6193752
• Journal Information: J. Appl. Phys.; (United States), Journal Name: J. Appl. Phys.; (United States) Vol. 50:7; ISSN JAPIA
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420300* -- Engineering-- Lasers-- (-1989)
ABSORPTION
ACCELERATORS
ANNULAR SPACE
APERTURES
BEAM MONITORS
BEAMS
CATHODES
CONFIGURATION
CURRENT DENSITY
ELECTRODES
ELECTRON BEAMS
ELEMENTS
ENERGY ABSORPTION
ENERGY-LEVEL TRANSITIONS
EXCITATION
FARADAY CUPS
GAS LASERS
INSTABILITY
LASERS
LEPTON BEAMS
MEASURING INSTRUMENTS
MONTE CARLO METHOD
NONMETALS
OPENINGS
PARTICLE BEAMS
PULSES
RARE GASES
XENON