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Device and method for the measurement of depth of interaction using co-planar electrodes

Patent ·
OSTI ID:915230
 [1]
  1. Syosset, NY
+ Show Author Affiliations
A device and method for measuring a depth of interaction of an ionizing event and improving resolution of a co-planar grid sensor (CPG) are provided. A time-of-occurrence is measured using a comparator to time the leading edge of the event pulse from the non-collecting or collecting grid. A difference signal between the grid signals obtained with a differential amplifier includes a pulse with a leading edge occurring at the time-of-detection, measured with another comparator. A timing difference between comparator outputs corresponds to the depth of interaction, calculated using a processor, which in turn weights the difference grid signal to improve spectral resolution of a CPG sensor. The device, which includes channels for grid inputs, may be integrated into an Application Specific Integrated Circuit. The combination of the device and sensor is included. An improved high-resolution CPG is provided, e.g., a gamma-ray Cadmium Zinc Telluride CPG sensor operating at room temperature.
Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY
Sponsoring Organization:
United States Department of Energy
DOE Contract Number:
AC02-98CH10886
Assignee:
Brookhaven Science Associates, LLC (Upton, NY)
Patent Number(s):
7,271,395
Application Number:
11/174,241
OSTI ID:
915230
Country of Publication:
United States
Language:
English

References (4)

Optimization criteria for coplanar-grid detectors journal June 1999
1-D position sensitive single carrier semiconductor detectors
  • He, Zhong; Knoll, Glenn F.; Wehe, David K.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 380, Issue 1-2 https://doi.org/10.1016/S0168-9002(96)00352-X
journal October 1996
Single‐polarity charge sensing in ionization detectors using coplanar electrodes journal November 1994
Position-sensitive single carrier CdZnTe detectors
  • He, Z.; Knoll, G. F.; Wehe, D. K.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 388, Issue 1-2 https://doi.org/10.1016/S0168-9002(97)00318-5
journal March 1997

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