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Title: Electrode configuration and signal subtraction technique for single polarity charge carrier sensing in ionization detectors

An ionization detector electrode and signal subtraction apparatus and method provides at least one first conductive trace formed onto the first surface of an ionization detector. The first surface opposes a second surface of the ionization detector. At least one second conductive trace is also formed on the first surface of the ionization detector in a substantially interlaced and symmetrical pattern with the at least one first conductive trace. Both of the traces are held at a voltage potential of a first polarity type. By forming the traces in a substantially interlaced and symmetric pattern, signals generated by a charge carrier are substantially of equal strength with respect to both of the traces. The only significant difference in measured signal strength occurs when the charge carrier moves to within close proximity of the traces and is received at the collecting trace. The measured signals are then subtracted and compared to quantitatively measure the magnitude of the charge and to determine the position at which the charge carrier originated within the ionization detector.
Inventors:
 [1]
  1. (Castro Valley, CA)
Issue Date:
OSTI Identifier:
870487
Assignee:
Regents of University of California (Oakland, CA) LBNL
Patent Number(s):
US 5530249
Contract Number:
AC03-76SF00098
Research Org:
UNIVERSITY OF CALIFORNIA
Country of Publication:
United States
Language:
English
Subject:
electrode; configuration; signal; subtraction; technique; single; polarity; charge; carrier; sensing; ionization; detectors; detector; apparatus; method; provides; conductive; trace; formed; surface; opposes; substantially; interlaced; symmetrical; pattern; traces; held; voltage; potential; type; forming; symmetric; signals; generated; equal; strength; respect; significant; difference; measured; occurs; moves; close; proximity; received; collecting; subtracted; compared; quantitatively; measure; magnitude; determine; position; originated; voltage potential; measured signal; charge carrier; electrode configuration; close proximity; ionization detector; method provides; method provide; signals generated; signal strength; signal subtraction; single polarity; polarity charge; symmetrical pattern; quantitatively measure; equal strength; detector electrode; /250/

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