Radiant energy – Invisible radiant energy responsive electric signalling – Including a radiant energy responsive gas discharge device
Patent
1996-05-13
1997-05-20
Fields, Carolyn E.
Radiant energy
Invisible radiant energy responsive electric signalling
Including a radiant energy responsive gas discharge device
250374, G01T 1185
Patent
active
056314701
ABSTRACT:
The present invention provides electrode assemblies for LIC imagers that maximize ion collection and the electric field for the minimum bias voltage. To achieve this optimization the ion collection is confined to small regions. Due to this limited ion collection region, high neutralization efficiencies and fast sweep-out times can be obtained. Furthermore, with an electrode separation of approximately 0.1 millimeters, pulse voltages of less than 100 volts can be used. Low voltages result in improved reliability, longer system life, and lower safety risks.
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N. Derhacobian, "Determination of Surface Recombination Velocity and Bulk Lifetime in Detector Grade Silicon and Germanium Crystals", IEEE (1994), pp. 406-410.
M. van Herk, "Physical Aspects of a Liquid-Filled Ionization Chamber with Pulsed Polarizing Voltage", Med. Phys. 18(4), Jul./Aug. 1991, pp. 692-702.
P. N. Luke, et al., "Amorphous Ge Bipolar Blocking Contacts on Ge Detectors", IEEE, pp. 85-89, 1994.
P. N. Luke, et al., "A 140-element Ge Detector Fabricated with Amorphous Ge Blocking Contacts", IEEE (1994), pp. 403-405.
D. J. Wagenaar, et al., "A Computer-Controlled X-ray Imaging Scanner Using a Kinestatic Charge Detector", Rev. Sci. Instrum. 61 (2), Feb. 1990, pp. 701-711.
Day Derek J.
Fencl Willi
Majidi-Ahy Reza
Provencale Salvatore
Riem Heinrich
Fields Carolyn E.
Varian Associates Inc.
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