Extreme-ultraviolet illumination effects on the PBFA-I magnetically insulated ion diode

Journal Article · Sun Jan 15 04:00:00 EST 1989 · J. Appl. Phys.; (United States)

DOI:https://doi.org/10.1063/1.343126· OSTI ID:6567282

Maenchen, J E; Woodworth, J R; Mehlhorn, T A; Renk, T; Ruiz, C L; Foltz, B W; Jaramillo, W H; Wenger, D F; Reyes, P; Guidotti, K; others, and

We have examined the effect of illuminating the anode in the Applied-B ion diode in Sandia's PBFA-I accelerator with 60--100 kW/cm/sup 2/ of extreme-ultraviolet (XUV) photons a few hundred nanoseconds prior to the accelerator shot. We find that XUV illumination significantly shortens the turn-on time of the ion beam, especially under conditions in which the normal ''flashover'' ion-source mechanisms are suppressed. In addition to the anticipated XUV photodesorption and photoionization of the anode material, some of the improvement seen with XUV illumination may be due to photoejection of electrons from the power feeds and their subsequent interaction with the anode source. Also, XUV illumination of a fine polypropylene weave located at the virtual cathode radius can preform the virtual cathode, dramatically reducing the turn-on time of the ion beam in the diode.

• Research Organization: Sandia National Laboratories, Albuquerque, New Mexico 87185
• OSTI ID: 6567282
• Journal Information: J. Appl. Phys.; (United States), Journal Name: J. Appl. Phys.; (United States) Vol. 65:2; ISSN JAPIA
• Country of Publication: United States
• Language: English

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70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700208* -- Fusion Power Plant Technology-- Inertial Confinement Technology
ACCELERATORS
BEAMS
CONFINEMENT
DIODE TUBES
ELECTROMAGNETIC RADIATION
ELECTRON TUBES
FABRICATION
INERTIAL CONFINEMENT
ION BEAMS
ION SOURCES
PARTICLE BEAM FUSION ACCELERATOR
PLASMA CONFINEMENT
RADIATIONS
THERMIONIC DIODES
THERMIONIC TUBES
ULTRAVIOLET RADIATION