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Title: Detector and energy analyzer for energetic-hydrogen in beams and plasmas

Abstract

A detector for detecting energetic hydrogen ions and atoms ranging in energy from about 1 eV up to 1 keV in an evacuated environment includes a Schottky diode with a palladium or palladium-alloy gate metal applied to a silicon-dioxide layer on an n-silicon substrate. An array of the energetic-hydrogen detectors having a range of energy sensitivities form a plasma energy analyzer having a rapid response time and a sensitivity for measuring fluxes of energetic hydrogen. The detector is sensitive to hydrogen and its isotopes but is insensitive to non-hydrogenic particles. The array of energetic-hydrogen detectors can be formed on a single silicon chip, with thin-film layers of gold metal applied in various thicknesses to successive detectors in the array. The gold layers serve as particle energy-filters so that each detector is sensitive to a different range of hydrogen energies. 4 figs.

Inventors:
; ;
Publication Date:
OSTI Identifier:
7068106
Patent Number(s):
US 4782302; A
Application Number:
PPN: US 6-925590
Assignee:
Dept. of Energy, Washington, DC (United States) SNL; EDB-94-118100
DOE Contract Number:
AC04-76DP00789
Resource Type:
Patent
Resource Relation:
Patent File Date: 31 Oct 1986
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; BEAM ANALYZERS; HYDROGEN; DETECTION; HYDROGEN ISOTOPES; PLASMA DIAGNOSTICS; SCHOTTKY BARRIER DIODES; SENSITIVITY; VACUUM SYSTEMS; ELEMENTS; ISOTOPES; NONMETALS; SEMICONDUCTOR DEVICES; SEMICONDUCTOR DIODES; 430300* - Particle Accelerators- Auxiliaries & Components; 700320 - Plasma Diagnostic Techniques & Instrumentation- (1992-)

Citation Formats

Bastasz, R.J., Hughes, R.C., and Wampler, W.R. Detector and energy analyzer for energetic-hydrogen in beams and plasmas. United States: N. p., 1988. Web.
Bastasz, R.J., Hughes, R.C., & Wampler, W.R. Detector and energy analyzer for energetic-hydrogen in beams and plasmas. United States.
Bastasz, R.J., Hughes, R.C., and Wampler, W.R. 1988. "Detector and energy analyzer for energetic-hydrogen in beams and plasmas". United States. doi:.
@article{osti_7068106,
title = {Detector and energy analyzer for energetic-hydrogen in beams and plasmas},
author = {Bastasz, R.J. and Hughes, R.C. and Wampler, W.R.},
abstractNote = {A detector for detecting energetic hydrogen ions and atoms ranging in energy from about 1 eV up to 1 keV in an evacuated environment includes a Schottky diode with a palladium or palladium-alloy gate metal applied to a silicon-dioxide layer on an n-silicon substrate. An array of the energetic-hydrogen detectors having a range of energy sensitivities form a plasma energy analyzer having a rapid response time and a sensitivity for measuring fluxes of energetic hydrogen. The detector is sensitive to hydrogen and its isotopes but is insensitive to non-hydrogenic particles. The array of energetic-hydrogen detectors can be formed on a single silicon chip, with thin-film layers of gold metal applied in various thicknesses to successive detectors in the array. The gold layers serve as particle energy-filters so that each detector is sensitive to a different range of hydrogen energies. 4 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = 1988,
month =
}
  • A detector for detecting energetic hydrogen ions and atoms ranging in energy from about 1 eV up to 1 keV in an evacuated environment includes a Schottky diode with a palladium or palladium-alloy gate metal applied to a silicondioxide layer on an n-silicon substrate. An array of the energetic-hydrogen detectors having a range of energy sensitivities form a plasma energy analyzer having a rapid response time and a sensitivity for measuring fluxes of energetic hydrogen. The detector is sensitive to hydrogen and its isotopes but is insensitive to non-hydrogenic particles. The array of energetic-hydrogen detectors can be formed on amore » single silicon chip, with thin-film layers of gold metal applied in various thicknesses to successive detectors in the array. The gold layers serve as particle energy-filters so that each detector is sensitive to a different range of hydrogen energies.« less
  • A detector for detecting energetic hydrogen ions and atoms ranging in energy from about 1 eV up to 1 keV in an evacuated environment includes a Schottky diode with a palladium or palladium-alloy gate metal applied to a silicon-dioxide layer on an n-silicon substrate. An array of the energetic-hydrogen detectors having a range of energy sensitivities form a plasma energy analyzer having a rapid response time and a sensitivity for measuring fluxes of energetic hydrogen. The detector is sensitive to hydrogen and its isotopes, but is insensitive to non-hydrogenic particles. The array of energetic-hydrogen detectors can be formed on amore » single silicon chip, with thin-film layers of gold metal applied in various thicknesses to successive detectors in the array. The gold layers serve as particle energy-filters so that each detector is sensitive to a different range of hydrogen energies.« less
  • A polarization analyzer for an energy laser beam is described comprising a wire resistor wound such that it presents straight line segments each in a single plane and parallel to each other, first means connected to the resistor so as to position the plane such that the laser beam will be substantially perpendicular to the plane and will impringe on at least a portion of the segments so as to cause heating of the resistor in accordance to the average power output of the beam and its polarization position relative to the alignment of the segments. First measurement means connectmore » to the wire resistor for measuring the resistance of the resistor. One raceway means connect to the first means so as to allow rotation of the segments within the plane. Second measurement means connect to the first means and the raceway means for measuring the angle of rotation of the segments relative to a predetermined angle position of the segments relative to the raceway, and the first means are rotated so as to allow measurements to be made about the angles of rotation of the segments.« less
  • A radiation detector array and a method for measuring the spectral content of radiation. The radiation sensor or detector is an array or stack of thin solid-electrolyte batteries. The batteries, arranged in a stack, may be composed of independent battery cells or may be arranged so that adjacent cells share a common terminal surface. This common surface is possible since the polarity of the batteries with respect to an adjacent battery is unrestricted, allowing a reduction in component parts of the assembly and reducing the overall stack length. Additionally, a test jig or chamber for allowing rapid measurement of themore » voltage across each battery is disclosed. A multichannel recorder and display may be used to indicate the voltage gradient change across the cells, or a small computer may be used for rapidly converting these voltage readings to a graph of radiation intensity versus wavelength or energy. The behavior of the batteries when used as a radiation detector and analyzer are such that the voltage measurements can be made at leisure after the detector array has been exposed to the radiation, and it is not necessary to make rapid measurements as is now done.« less
  • An energy analyzer for the study of electron beam distribution functions in unmagnetized plasmas is described. This analyzer is designed to avoid large electric fields that are created in multigrid analyzers and to measure directly the beam distribution function without differentiation. As an example of an application, results are presented on the propagation of an energetic beam (E/sub b/ : 2.0 keV) in a plasma (n/sub o/ : 1. x 10/sup 10/ cm/sup -3/, T/sub e/ : 1.4 eV).