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Title: Neutral particle beam sensing and steering

Abstract

The direction of a neutral particle beam (NPB) is determined by detecting Ly.alpha. radiation emitted during motional quenching of excited H(2S) atoms in the beam during movement of the atoms through a magnetic field. At least one detector is placed adjacent the beam exit to define an optical axis that intercepts the beam at a viewing angle to include a volume generating a selected number of photons for detection. The detection system includes a lens having an area that is small relative to the NPB area and a pixel array located in the focal plane of the lens. The lens viewing angle and area pixel array are selected to optimize the beam tilt sensitivity. In one embodiment, two detectors are placed coplanar with the beam axis to generate a difference signal that is insensitive to beam variations other than beam tilt.

Inventors:
 [1];  [1];  [1]
  1. (Los Alamos, NM)
Issue Date:
Research Org.:
Los Alamos National Laboratory (LANL), Los Alamos, NM
OSTI Identifier:
867954
Patent Number(s):
5043574
Assignee:
United States of America as represented by United States (Washington, DC) LANL
DOE Contract Number:  
W-7405-ENG-36
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
neutral; particle; beam; sensing; steering; direction; npb; determined; detecting; alpha; radiation; emitted; motional; quenching; excited; 2s; atoms; movement; magnetic; field; detector; placed; adjacent; exit; define; optical; axis; intercepts; viewing; angle; volume; generating; selected; photons; detection; lens; relative; pixel; array; located; focal; plane; optimize; tilt; sensitivity; embodiment; detectors; coplanar; generate; difference; signal; insensitive; variations; difference signal; neutral particle; placed adjacent; beam exit; optical axis; particle beam; magnetic field; radiation emitted; focal plane; pixel array; beam axis; /250/

Citation Formats

Maier, II, William B., Cobb, Donald D., and Robiscoe, Richard T. Neutral particle beam sensing and steering. United States: N. p., 1991. Web.
Maier, II, William B., Cobb, Donald D., & Robiscoe, Richard T. Neutral particle beam sensing and steering. United States.
Maier, II, William B., Cobb, Donald D., and Robiscoe, Richard T. Tue . "Neutral particle beam sensing and steering". United States. https://www.osti.gov/servlets/purl/867954.
@article{osti_867954,
title = {Neutral particle beam sensing and steering},
author = {Maier, II, William B. and Cobb, Donald D. and Robiscoe, Richard T.},
abstractNote = {The direction of a neutral particle beam (NPB) is determined by detecting Ly.alpha. radiation emitted during motional quenching of excited H(2S) atoms in the beam during movement of the atoms through a magnetic field. At least one detector is placed adjacent the beam exit to define an optical axis that intercepts the beam at a viewing angle to include a volume generating a selected number of photons for detection. The detection system includes a lens having an area that is small relative to the NPB area and a pixel array located in the focal plane of the lens. The lens viewing angle and area pixel array are selected to optimize the beam tilt sensitivity. In one embodiment, two detectors are placed coplanar with the beam axis to generate a difference signal that is insensitive to beam variations other than beam tilt.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1991},
month = {1}
}

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