Accession Number : ADD003766

Title :   Low Self-Bias Variable Gap Diode.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE ARMY WASHINGTON D C

Personal Author(s) : Gilbert,Raine M

Report Date : 19 Oct 1976

Pagination or Media Count : 6

Abstract : A parallel-plate variable-gap diode is described which is used to detect X and gamma radiation pulses. The collector of the diode is comprised of an interior circular portion and a concentric external annular portion, the collecting surfaces of which are coplanar and noncontiguous. A shielded low-inductance resistorring shunts the bulk of the sampled current back through the annular portion of the collector to the emitter thereby reducing self-bias effects. The central location and relatively small size of the current sampler minimize the perturbing influence of the walls at the periphery of the cavity. A one-dimensional electron transport analysis can therefore provide the link between the incident radiation and the observed current response of the diode. The cylindrical walls of the cavity are interchangeable spacers which permit the variation of separation between emitter and collector. (Author)

Descriptors :   *Patents, *Diodes, *Gamma rays, *X rays, *Radiation measuring instruments, Bias, Electron transport

Subject Categories : Electrical and Electronic Equipment
      Nuclear Instrumentation

Distribution Statement : APPROVED FOR PUBLIC RELEASE