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Title: Facility for intense diagnostic neutral beam (IDNB) development

Abstract

An intense, pulsed neutral beam source is under development for use as a probe beam on hot, burning plasmas such as in the international thermonuclear experimental reactor (ITER) which is presently in the planning stage. A pulsed, neutral hydrogen beam of 10s of kilo amperes of current can have an alpha particle, charge-exchange-recombination-spectroscopy (alpha-CHERS) signal-to-noise ratio of {approximately} 10. This beam would allow the measurement, on a single pulse of a few hundred nanoseconds duration, of the local alpha particle distribution function as well as other features of the tokamak plasma such as current density profile, impurity density, and microturbulence spectrum. The cross-sections for the CHERS diagnostic dictate operation with proton energies greater than {approximately}50keV. A pulsed neutral hydrogen source of this voltage and intensity can be achieved by neutralizing the ion flux from a magnetized ion-diode. The cross-sections for attachment and stripping, when coupled with scaling from Child-Langmiur, space-charge-limited, ion-current flow imply operation below - 100keV for maximum neutral fluence. The development of a flashover-anode, ion source for forthcoming evaluation of a neutralizing section is described below. This source operates in the accelerator voltage range 70 to 100keV. Eventually, the flashover-anode, magnetized ion-diode will be replaced with a plasma-anode,more » magnetized ion-diode.« less

Authors:
; ; ; ; ;
Publication Date:
Research Org.:
Los Alamos National Lab., NM (United States)
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
10178589
Report Number(s):
LA-UR-93-2769; CONF-930616-15
ON: DE93018288; TRN: 93:018933
DOE Contract Number:  
W-7405-ENG-36
Resource Type:
Conference
Resource Relation:
Conference: 9. IEEE pulsed power conference,Albuquerque, NM (United States),21-23 Jun 1993; Other Information: PBD: [1993]
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ITER TOKAMAK; PLASMA DIAGNOSTICS; NEUTRAL BEAM SOURCES; DESIGN; SIGNAL-TO-NOISE RATIO; CROSS SECTIONS; ION SOURCES; NEUTRAL ATOM BEAM INJECTION; 700320; PLASMA DIAGNOSTIC TECHNIQUES AND INSTRUMENTATION

Citation Formats

Kasik, R J, Hinckley, W B, Bartsch, R R, Rej, D J, Henins, I, and Greenly, J B. Facility for intense diagnostic neutral beam (IDNB) development. United States: N. p., 1993. Web.
Kasik, R J, Hinckley, W B, Bartsch, R R, Rej, D J, Henins, I, & Greenly, J B. Facility for intense diagnostic neutral beam (IDNB) development. United States.
Kasik, R J, Hinckley, W B, Bartsch, R R, Rej, D J, Henins, I, and Greenly, J B. 1993. "Facility for intense diagnostic neutral beam (IDNB) development". United States. https://www.osti.gov/servlets/purl/10178589.
@article{osti_10178589,
title = {Facility for intense diagnostic neutral beam (IDNB) development},
author = {Kasik, R J and Hinckley, W B and Bartsch, R R and Rej, D J and Henins, I and Greenly, J B},
abstractNote = {An intense, pulsed neutral beam source is under development for use as a probe beam on hot, burning plasmas such as in the international thermonuclear experimental reactor (ITER) which is presently in the planning stage. A pulsed, neutral hydrogen beam of 10s of kilo amperes of current can have an alpha particle, charge-exchange-recombination-spectroscopy (alpha-CHERS) signal-to-noise ratio of {approximately} 10. This beam would allow the measurement, on a single pulse of a few hundred nanoseconds duration, of the local alpha particle distribution function as well as other features of the tokamak plasma such as current density profile, impurity density, and microturbulence spectrum. The cross-sections for the CHERS diagnostic dictate operation with proton energies greater than {approximately}50keV. A pulsed neutral hydrogen source of this voltage and intensity can be achieved by neutralizing the ion flux from a magnetized ion-diode. The cross-sections for attachment and stripping, when coupled with scaling from Child-Langmiur, space-charge-limited, ion-current flow imply operation below - 100keV for maximum neutral fluence. The development of a flashover-anode, ion source for forthcoming evaluation of a neutralizing section is described below. This source operates in the accelerator voltage range 70 to 100keV. Eventually, the flashover-anode, magnetized ion-diode will be replaced with a plasma-anode, magnetized ion-diode.},
doi = {},
url = {https://www.osti.gov/biblio/10178589}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Sun Aug 01 00:00:00 EDT 1993},
month = {Sun Aug 01 00:00:00 EDT 1993}
}

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