Alternating current long range alpha particle detector
An alpha particle detector, utilizing alternating currents, which is capable of detecting alpha particles from distinct sources. The use of alternating currents allows use of simpler ac circuits which, in turn, are not susceptible to dc error components. It also allows the benefit of gas gain, if desired. In the invention, a voltage source creates an electric field between two conductive grids, and between the grids and a conductive enclosure. Air containing air ions created by collision with alpha particles is drawn into the enclosure and detected. In some embodiments, the air flow into the enclosure is interrupted, creating an alternating flow of ions. In another embodiment, a modulated voltage is applied to the grid, also modulating the detection of ions.
- DOE Contract Number:
- W-7405-ENG-36
- Assignee:
- Univ. of California, Alameda, CA (United States)
- Patent Number(s):
- US 5187370; A
- Application Number:
- PPN: US 7-799464
- OSTI ID:
- 6289389
- Resource Relation:
- Patent File Date: 27 Nov 1991
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ALPHA DETECTION
RADIATION DETECTORS
DESIGN
AC SYSTEMS
AIR FLOW
ELECTRIC CONDUCTORS
ELECTRIC CURRENTS
ELECTRIC FIELDS
ERRORS
IONIZATION
CHARGED PARTICLE DETECTION
CURRENTS
DETECTION
ENERGY SYSTEMS
FLUID FLOW
GAS FLOW
MEASURING INSTRUMENTS
POWER SYSTEMS
RADIATION DETECTION
440101* - Radiation Instrumentation- General Detectors or Monitors & Radiometric Instruments