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High resolution amorphous silicon radiation detectors

Patent ·
OSTI ID:868313
 [1];  [2];  [3]
  1. Palo Alto, CA
  2. El Cerrito, CA
  3. Berkeley, CA
+ Show Author Affiliations
A radiation detector employing amorphous Si:H cells in an array with each detector cell having at least three contiguous layers (n type, intrinsic, p type), positioned between two electrodes to which a bias voltage is applied. An energy conversion layer atop the silicon cells intercepts incident radiation and converts radiation energy to light energy of a wavelength to which the silicon cells are responsive. A read-out device, positioned proximate to each detector element in an array allows each such element to be interrogated independently to determine whether radiation has been detected in that cell. The energy conversion material may be a layer of luminescent material having a columnar structure. In one embodiment a column of luminescent material detects the passage therethrough of radiation to be detected and directs a light beam signal to an adjacent a-Si:H film so that detection may be confined to one or more such cells in the array. One or both electrodes may have a comb structure, and the teeth of each electrode comb may be interdigitated for capacitance reduction. The amorphous Si:H film may be replaced by an amorphous Si:Ge:H film in which up to 40 percent of the amorphous material is Ge. Two dimensional arrays may be used in X-ray imaging, CT scanning, crystallography, high energy physics beam tracking, nuclear medicine cameras and autoradiography.
Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA
DOE Contract Number:
AC03-76SF00098
Assignee:
Regents of University of California (Oakland, CA)
Patent Number(s):
US 5117114
OSTI ID:
868313
Country of Publication:
United States
Language:
English

References (5)

A new scintillation material: Pure CsI with 10 ns decay time
  • Kubota, Shinzou; Sakuragi, Shirou; Hashimoto, Satoshi
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 268, Issue 1 https://doi.org/10.1016/0168-9002(88)90619-5
journal May 1988
The new scintillation material CsI and its application to position sensitive detectors
  • Kubota, Shinzou; Murakami, Hiroyuki; Ruan(Gen), Jian-Zhi
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 273, Issue 2-3 https://doi.org/10.1016/0168-9002(88)90071-X
journal December 1988
Amorphous silicon position-sensitive detector
  • Mochiki, Koh-ichi; Hasegawa, Ken-ichi; Namatame, Shuji
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 273, Issue 2-3 https://doi.org/10.1016/0168-9002(88)90070-8
journal December 1988
Amorphous-Silicon Photovoltaic X-Ray Sensor journal August 1985
A new type of X-ray area detector utilizing laser stimulated luminescence
  • Miyahara, Junji; Takahashi, Kenji; Amemiya, Yoshiyuki
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 246, Issue 1-3 https://doi.org/10.1016/0168-9002(86)90156-7
journal May 1986

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Related Subjects

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