Ionization detector, electrode configuration and single polarity

Details Ionization detector, electrode configuration and single polarity Ionization detector, electrode configuration and single polarity

1996-12-11

1998-07-07

Hannaher, Constantine

Radiant energy

Invisible radiant energy responsive electric signalling

Including a radiant energy responsive gas discharge device

25037013, G01T 1185, G01T 124

Patent

active

057773386

ABSTRACT:
An ionization detector, an electrode configuration and a single polarity charge detection method each utilize a boundary electrode which symmetrically surrounds first and second central interlaced and symmetrical electrodes. All of the electrodes are held at a voltage potential of a first polarity type. The first central electrode is held at a higher potential than the second central or boundary electrodes. By forming the first and second central electrodes in a substantially interlaced and symmetrical pattern and forming the boundary electrode symmetrically about the first and second central electrodes, signals generated by charge carriers are substantially of equal strength with respect to both of the central electrodes. The only significant difference in measured signal strength occurs when the charge carriers move to within close proximity of the first central electrode and are received at the first central electrode. The measured signals are then subtracted and compared to quantitatively measure the magnitude of the charge.

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Unipolar Charge Sensing with Coplanar Electrodes-Applications to Semiconductor Detectors, P. N. Luke, IEEE Transactions on Nuclear Science, vol. 42, No. 4, Aug. 1995.
1-D Position Sensitive Single Carrier Semiconductor Detectors (He et al.) UM File No. 1263, Department of Nuclear Engineering.
Single-Polarity Charge Sensing in Ionization Detectors Using Electrodes, Luke, Appl. Phys. Lett. 65 (122), 28 Nov. 1994.
New Gamma-Ray Detector Structures for Electron Only Charge Carrier Collection Utilizing High-Z Compound Semiconductors, B.E. Patt et al. 9th International Workshop, 1995.
Performance of CdZnTe Coplanar-Grid Gamma-Ray Detectors, P.N. Luke et al., 0018-9499/1996 IEEE.

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