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Title: A proposal for a novel H ion source based on electron cyclotron resonance heating and surface ionization

Abstract

A design for a novel H{sup -} ion source based on electron cyclotron resonance plasma heating and surface ionization is presented. The plasma chamber of the source is an rf-cavity designed for TE{sub 111} eigenmode at 2.45 GHz. The desired mode is excited with a loop antenna. The ionization process takes place on a cesiated surface of a biased converter electrode. The H{sup -} ion beam is further 'self-extracted' through the plasma region. The magnetic field of the source is optimized for plasma generation by electron cyclotron resonance heating, and beam extraction. The design features of the source are discussed in detail and the attainable H{sup -} ion current, beam emittance and duty factor of the novel source are estimated.

Authors:
 [1];  [1]
  1. Los Alamos National Laboratory
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
960571
Report Number(s):
LA-UR-08-05313; LA-UR-08-5313
TRN: US1002070
DOE Contract Number:
AC52-06NA25396
Resource Type:
Journal Article
Country of Publication:
United States
Language:
English
Subject:
43; BEAM EMITTANCE; BEAM EXTRACTION; CURRENTS; DESIGN; ECR HEATING; ELECTRON CYCLOTRON-RESONANCE; HELICON RESONANCE; HYDROGEN 1 MINUS BEAMS; ICP MASS SPECTROSCOPY; ION BEAMS; ION CYCLOTRON-RESONANCE; ION SOURCES; IONIZATION; IONS; MAGNETIC FIELDS; PLASMA; PLASMA HEATING; PLASMA PRODUCTION; SURFACE IONIZATION; SURFACES

Citation Formats

Tarvainen, Ollie A, and Kurennoy, Sergey. A proposal for a novel H ion source based on electron cyclotron resonance heating and surface ionization. United States: N. p., 2008. Web.
Tarvainen, Ollie A, & Kurennoy, Sergey. A proposal for a novel H ion source based on electron cyclotron resonance heating and surface ionization. United States.
Tarvainen, Ollie A, and Kurennoy, Sergey. 2008. "A proposal for a novel H ion source based on electron cyclotron resonance heating and surface ionization". United States. doi:. https://www.osti.gov/servlets/purl/960571.
@article{osti_960571,
title = {A proposal for a novel H ion source based on electron cyclotron resonance heating and surface ionization},
author = {Tarvainen, Ollie A and Kurennoy, Sergey},
abstractNote = {A design for a novel H{sup -} ion source based on electron cyclotron resonance plasma heating and surface ionization is presented. The plasma chamber of the source is an rf-cavity designed for TE{sub 111} eigenmode at 2.45 GHz. The desired mode is excited with a loop antenna. The ionization process takes place on a cesiated surface of a biased converter electrode. The H{sup -} ion beam is further 'self-extracted' through the plasma region. The magnetic field of the source is optimized for plasma generation by electron cyclotron resonance heating, and beam extraction. The design features of the source are discussed in detail and the attainable H{sup -} ion current, beam emittance and duty factor of the novel source are estimated.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = 2008,
month = 1
}
  • A design for a novel H{sup -} ion source based on electron cyclotron resonance plasma heating and surface ionization is presented. The plasma chamber of the source is an rf-cavity designed for TE{sub 111} eigenmode at 2.45 GHz. The desired mode is excited with a loop antenna. The ionization process takes place on a cesiated surface of a biased converter electrode. The H{sup -} ion beam is further ''self-extracted'' through the plasma region. The magnetic field of the source is optimized for plasma generation by electron cyclotron resonance heating, and beam extraction. The design features of the source are discussedmore » in detail and the attainable H{sup -} ion current, beam emittance and duty factor of the novel source are estimated.« less
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  • Multiply charged iron ions are produced from solid pure material in an electron cyclotron resonance (ECR) ion source. We develop an evaporator by using induction heating with the induction coil which is made from bare molybdenum wire and surrounding the pure iron rod. We optimize the shape of induction heating coil and operation of rf power supply. We conduct experiment to investigate reproducibility and stability in the operation and heating efficiency. Induction heating evaporator produces pure material vapor, because materials directly heated by eddy currents have non-contact with insulated materials which are impurity gas sources. The power and the frequencymore » of the induction currents range from 100 to 900 W and from 48 to 23 kHz, respectively. The working pressure is about 10{sup -4} to 10{sup -3} Pa. We measure temperature of iron rod and film deposition rate by depositing iron vapor to crystal oscillator. We confirm stability and reproducibility of evaporator enough to conduct experiment in ECR ion source. We can obtain required temperature of iron under maximum power of power supply. We are aiming the evaporator higher melting point material than iron.« less
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