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Title: Neutral particle beam intensity controller

Abstract

A neutral beam intensity controller is provided for a neutral beam generator in which a neutral beam is established by accelerating ions from an ion source into a gas neutralizer. An amplitude modulated, rotating magnetic field is applied to the accelerated ion beam in the gas neutralizer to defocus the resultant neutral beam in a controlled manner to achieve intensity control of the neutral beam along the beam axis at constant beam energy. The rotating magnetic field alters the orbits of ions in the gas neutralizer before they are neutralized, thereby controlling the fraction of neutral particles transmitted out of the neutralizer along the central beam axis to a fusion device or the like. The altered path or defocused neutral particles are sprayed onto an actively cooled beam dump disposed perpendicular to the neutral beam axis and having a central open for passage of the focused beam at the central axis of the beamline. Virtually zero therough 100% intensity control is achieved by varying the magnetic field strength without altering the ion source beam intensity or its species yield.

Inventors:
 [1]
  1. Oak Ridge, TN
Issue Date:
Research Org.:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN
OSTI Identifier:
865892
Patent Number(s):
4596687
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; particle; beam; intensity; controller; provided; generator; established; accelerating; source; gas; neutralizer; amplitude; modulated; rotating; magnetic; field; applied; accelerated; defocus; resultant; controlled; manner; achieve; control; axis; constant; energy; alters; orbits; neutralized; controlling; fraction; particles; transmitted; central; fusion; device; altered; path; defocused; sprayed; actively; cooled; dump; disposed; perpendicular; passage; focused; beamline; virtually; zero; therough; 100; achieved; varying; strength; altering; species; yield; rotating magnetic; amplitude modulated; neutral particle; neutral particles; beam dump; beam generator; beam intensity; central axis; particle beam; magnetic field; field strength; beam energy; neutral beam; controlled manner; focused beam; beam axis; actively cooled; source beam; intensity control; central beam; disposed perpendicular; intensity controller; species yield; constant beam; /376/250/313/

Citation Formats

Dagenhart, William K. Neutral particle beam intensity controller. United States: N. p., 1986. Web.
Dagenhart, William K. Neutral particle beam intensity controller. United States.
Dagenhart, William K. Wed . "Neutral particle beam intensity controller". United States. https://www.osti.gov/servlets/purl/865892.
@article{osti_865892,
title = {Neutral particle beam intensity controller},
author = {Dagenhart, William K},
abstractNote = {A neutral beam intensity controller is provided for a neutral beam generator in which a neutral beam is established by accelerating ions from an ion source into a gas neutralizer. An amplitude modulated, rotating magnetic field is applied to the accelerated ion beam in the gas neutralizer to defocus the resultant neutral beam in a controlled manner to achieve intensity control of the neutral beam along the beam axis at constant beam energy. The rotating magnetic field alters the orbits of ions in the gas neutralizer before they are neutralized, thereby controlling the fraction of neutral particles transmitted out of the neutralizer along the central beam axis to a fusion device or the like. The altered path or defocused neutral particles are sprayed onto an actively cooled beam dump disposed perpendicular to the neutral beam axis and having a central open for passage of the focused beam at the central axis of the beamline. Virtually zero therough 100% intensity control is achieved by varying the magnetic field strength without altering the ion source beam intensity or its species yield.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1986},
month = {1}
}

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