Electron flow and impedance of an 18-blade frustum diode

Journal Article · Sun Jun 01 04:00:00 EDT 1986 · J. Appl. Phys.; (United States)

DOI:https://doi.org/10.1063/1.336729· OSTI ID:5971230

Sanford, T W.L.; Lee, J R; Halbleib, J A; Quintenz, J P; Coats, R S; Stygar, W A; Clark, R E; Faucett, D L; Webb, D; Heath, C E

A new, large-area, high-uniformity, flash x-ray source that efficiently couples electrical energy to photon energy has been successfully constructed and tested on the 1-MV, 2-MA electron accelerator SPEED (short pulse experimental electron device). The source employs 18 individual blade diodes arranged in the configuration of a frustum. Each blade was magnetically isolated on the real-cathode side of an anode foil, but not on the virtual-cathode side. The operation of the diode was heavily diagnosed using 24 Rogowski coils, a vacuum voltage monitor, p-i-n diode detectors, an 80-element TLD array, and a fast-framing x-ray pinhole camera. The individual blade diodes were found to exhibit line pinching, end-to-end pinching, and minimal electron reflexing through the Ta anode foil, with a radiation yield that agreed with Monte Carlo simulations. The end-to-end pinch location could be controlled by tapering the anode--cathode gap. The impedance depended on only the smallest spacing, and was independent of pinch location.

• Research Organization: Sandia National Laboratories, Albuquerque, New Mexico 87185
• OSTI ID: 5971230
• Journal Information: J. Appl. Phys.; (United States), Journal Name: J. Appl. Phys.; (United States) Vol. 59:11; ISSN JAPIA
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420800* -- Engineering-- Electronic Circuits & Devices-- (-1989)
ACCELERATORS
ANODES
BEAM OPTICS
BEAMS
CATHODES
CHARGED-PARTICLE TRANSPORT
CURRENTS
DESIGN
DIODE TUBES
EFFICIENCY
ELECTRIC CURRENTS
ELECTRIC IMPEDANCE
ELECTRODES
ELECTRON BEAMS
ELECTRON GUNS
ELECTRON TUBES
EQUIPMENT
FABRICATION
IMPEDANCE
LEPTON BEAMS
MONTE CARLO METHOD
OPERATION
PARTICLE BEAMS
RADIATION SOURCES
RADIATION TRANSPORT
TESTING
X-RAY EQUIPMENT
X-RAY SOURCES