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Title: Ion charge state distributions of pulsed vacuum arc plasmas in strong magnetic fields

Abstract

Vacuum arc plasmas with discharge currents of 300 A and duration 250 {mu}s have been produced in strong magnetic fields up to 4 T. Ion charge state distributions have been measured for C, Al, Ag, Ta, Pt, Ho, and Er with a time-of-flight charge-mass spectrometer. Our previous measurements have been confirmed which show that ion charge states can be considerably enhanced when increasing the magnetic field up to about 1 T. The new measurements address the question of whether or not the additional increase continues at even higher magnetic field strength. It has been found that the increase becomes insignificant for field strengths greater than 1 T. Ion charge state distributions are almost constant for magnetic field strengths between 2 and 4 T. The results are explained by comparing the free expansion length with the freezing length. The most significant changes of charge state distributions are observed when these lengths are similar. {copyright} {ital 1998 American Institute of Physics.}

Authors:
 [1];  [2];  [3];  [2];  [1]
  1. Ernest Orlando Lawrence Berkeley National Laboratory, University of California, Berkeley, California 94720 (United States)
  2. High Current Electronics Institute, Russian Academy of Sciences, Tomsk 634055 (Russia)
  3. State University of Control Systems and Radioelectronics, Tomsk 634050 (Russia)
Publication Date:
OSTI Identifier:
591895
Report Number(s):
CONF-980145-
Journal ID: RSINAK; ISSN 0034-6748; TRN: 98:004856
Resource Type:
Journal Article
Journal Name:
Review of Scientific Instruments
Additional Journal Information:
Journal Volume: 69; Journal Issue: 2; Conference: 7. international conference on ion sources, Shirahama (Japan), 26-27 Jan 1998; Other Information: PBD: Feb 1998
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION; PLASMA DIAGNOSTICS; PLASMA DENSITY; CARBON; ERBIUM; ALUMINIUM; HOLMIUM; SILVER; PLATINUM; TANTALUM; CHARGE STATES; MAGNETIC FIELDS; OPERATION; ION IMPLANTATION; CATHODES; ELECTRIC ARCS; VACUUM SYSTEMS; ION SOURCES; TIME-OF-FLIGHT METHOD; TIME-OF-FLIGHT MASS SPECTROMETERS; MASS SPECTRA

Citation Formats

Anders, A, Yushkov, G, Oks, E, Nikolaev, A, and Brown, I. Ion charge state distributions of pulsed vacuum arc plasmas in strong magnetic fields. United States: N. p., 1998. Web. doi:10.1063/1.1148737.
Anders, A, Yushkov, G, Oks, E, Nikolaev, A, & Brown, I. Ion charge state distributions of pulsed vacuum arc plasmas in strong magnetic fields. United States. https://doi.org/10.1063/1.1148737
Anders, A, Yushkov, G, Oks, E, Nikolaev, A, and Brown, I. 1998. "Ion charge state distributions of pulsed vacuum arc plasmas in strong magnetic fields". United States. https://doi.org/10.1063/1.1148737.
@article{osti_591895,
title = {Ion charge state distributions of pulsed vacuum arc plasmas in strong magnetic fields},
author = {Anders, A and Yushkov, G and Oks, E and Nikolaev, A and Brown, I},
abstractNote = {Vacuum arc plasmas with discharge currents of 300 A and duration 250 {mu}s have been produced in strong magnetic fields up to 4 T. Ion charge state distributions have been measured for C, Al, Ag, Ta, Pt, Ho, and Er with a time-of-flight charge-mass spectrometer. Our previous measurements have been confirmed which show that ion charge states can be considerably enhanced when increasing the magnetic field up to about 1 T. The new measurements address the question of whether or not the additional increase continues at even higher magnetic field strength. It has been found that the increase becomes insignificant for field strengths greater than 1 T. Ion charge state distributions are almost constant for magnetic field strengths between 2 and 4 T. The results are explained by comparing the free expansion length with the freezing length. The most significant changes of charge state distributions are observed when these lengths are similar. {copyright} {ital 1998 American Institute of Physics.}},
doi = {10.1063/1.1148737},
url = {https://www.osti.gov/biblio/591895}, journal = {Review of Scientific Instruments},
number = 2,
volume = 69,
place = {United States},
year = {Sun Feb 01 00:00:00 EST 1998},
month = {Sun Feb 01 00:00:00 EST 1998}
}