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Title: Neutral beamline with improved ion energy recovery

Abstract

A neutral beamline generator with unneutralized ion energy recovery is provided which enhances the energy recovery of the full energy ion component of the beam exiting the neutralizer cell of the beamline. The unneutralized full energy ions exiting the neutralizer are deflected from the beam path and the electrons in the cell are blocked by a magnetic field applied transverse to the beamline in the cell exit region. The ions, which are generated at essentially ground potential and accelerated through the neutralizer cell by a negative acceleration voltage, are collected at ground potential. A neutralizer cell exit end region is provided which allows the magnetic and electric fields acting on the exiting ions to be closely coupled. As a result, the fractional energy ions exiting the cell with the full energy ions are reflected back into the gas cell. Thus, the fractional energy ions do not detract from the energy recovery efficiency of full energy ions exiting the cell which can reach the ground potential interior surfaces of the beamline housing.

Inventors:
 [1];  [2];  [1];  [1]
  1. Oak Ridge, TN
  2. Knoxville, TN
Issue Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
OSTI Identifier:
864902
Patent Number(s):
4434131
Assignee:
United States of America as represented by United States (Washington, DC)
DOE Contract Number:  
W-7405-ENG-26
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
neutral; beamline; improved; energy; recovery; generator; unneutralized; provided; enhances; component; beam; exiting; neutralizer; cell; deflected; path; electrons; blocked; magnetic; field; applied; transverse; exit; region; generated; essentially; ground; potential; accelerated; negative; acceleration; voltage; collected; allows; electric; fields; acting; closely; coupled; result; fractional; reflected; gas; detract; efficiency; reach; interior; surfaces; housing; recovery efficiency; neutral beamline; neutralizer cell; beam exit; ground potential; electric field; magnetic field; interior surface; interior surfaces; neutral beam; beam path; energy recovery; electric fields; closely coupled; field applied; negative acceleration; gas cell; acceleration voltage; beam exiting; beamline generator; /376/250/

Citation Formats

Dagenhart, William K, Haselton, Halsey H, Stirling, William L, and Whealton, John H. Neutral beamline with improved ion energy recovery. United States: N. p., 1984. Web.
Dagenhart, William K, Haselton, Halsey H, Stirling, William L, & Whealton, John H. Neutral beamline with improved ion energy recovery. United States.
Dagenhart, William K, Haselton, Halsey H, Stirling, William L, and Whealton, John H. Sun . "Neutral beamline with improved ion energy recovery". United States. https://www.osti.gov/servlets/purl/864902.
@article{osti_864902,
title = {Neutral beamline with improved ion energy recovery},
author = {Dagenhart, William K and Haselton, Halsey H and Stirling, William L and Whealton, John H},
abstractNote = {A neutral beamline generator with unneutralized ion energy recovery is provided which enhances the energy recovery of the full energy ion component of the beam exiting the neutralizer cell of the beamline. The unneutralized full energy ions exiting the neutralizer are deflected from the beam path and the electrons in the cell are blocked by a magnetic field applied transverse to the beamline in the cell exit region. The ions, which are generated at essentially ground potential and accelerated through the neutralizer cell by a negative acceleration voltage, are collected at ground potential. A neutralizer cell exit end region is provided which allows the magnetic and electric fields acting on the exiting ions to be closely coupled. As a result, the fractional energy ions exiting the cell with the full energy ions are reflected back into the gas cell. Thus, the fractional energy ions do not detract from the energy recovery efficiency of full energy ions exiting the cell which can reach the ground potential interior surfaces of the beamline housing.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1984},
month = {1}
}

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