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Title: Development and testing of a pulsed helium ion source for probing materials and warm dense matter studies

Abstract

In this paper, the neutralized drift compression experiment was designed and commissioned as a pulsed, linear induction accelerator to drive thin targets to warm dense matter (WDM) states with peak temperatures of ~1 eV using intense, short pulses (~1 ns) of 1.2 MeV lithium ions. At that kinetic energy, heating a thin target foil near the Bragg peak energy using He + ions leads to more uniform energy deposition of the target material than Li + ions. Experiments show that a higher current density of helium ions can be delivered from a plasma source compared to Li + ions from a hot plate type ion source. He + beam pulses as high as 200 mA at the peak and 4 μs long were measured from a multi-aperture 7-cm-diameter emission area. Within ±5% variation, the uniform beam area is approximately 6 cm across. Finally, the accelerated and compressed pulsed ion beams can be used for materials studies and isochoric heating of target materials for high energy density physics experiments and WDM studies.

Authors:
 [1];  [1];  [1];  [1];  [2];  [2];  [1];  [2];  [1]
  1. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  2. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Fusion Energy Sciences (FES) (SC-24)
OSTI Identifier:
1375994
Report Number(s):
LLNL-JRNL-702197
Journal ID: ISSN 0034-6748
Grant/Contract Number:  
AC52-07NA27344; AC02-05CH11231
Resource Type:
Accepted Manuscript
Journal Name:
Review of Scientific Instruments
Additional Journal Information:
Journal Volume: 87; Journal Issue: 2; Journal ID: ISSN 0034-6748
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ion sources; ion beams; current density; plasma sources; pump probe experiments

Citation Formats

Ji, Q., Seidl, P. A., Waldron, W. L., Takakuwa, J. H., Friedman, A., Grote, D. P., Persaud, A., Barnard, J. J., and Schenkel, T. Development and testing of a pulsed helium ion source for probing materials and warm dense matter studies. United States: N. p., 2015. Web. doi:10.1063/1.4932569.
Ji, Q., Seidl, P. A., Waldron, W. L., Takakuwa, J. H., Friedman, A., Grote, D. P., Persaud, A., Barnard, J. J., & Schenkel, T. Development and testing of a pulsed helium ion source for probing materials and warm dense matter studies. United States. doi:10.1063/1.4932569.
Ji, Q., Seidl, P. A., Waldron, W. L., Takakuwa, J. H., Friedman, A., Grote, D. P., Persaud, A., Barnard, J. J., and Schenkel, T. Thu . "Development and testing of a pulsed helium ion source for probing materials and warm dense matter studies". United States. doi:10.1063/1.4932569. https://www.osti.gov/servlets/purl/1375994.
@article{osti_1375994,
title = {Development and testing of a pulsed helium ion source for probing materials and warm dense matter studies},
author = {Ji, Q. and Seidl, P. A. and Waldron, W. L. and Takakuwa, J. H. and Friedman, A. and Grote, D. P. and Persaud, A. and Barnard, J. J. and Schenkel, T.},
abstractNote = {In this paper, the neutralized drift compression experiment was designed and commissioned as a pulsed, linear induction accelerator to drive thin targets to warm dense matter (WDM) states with peak temperatures of ~1 eV using intense, short pulses (~1 ns) of 1.2 MeV lithium ions. At that kinetic energy, heating a thin target foil near the Bragg peak energy using He+ ions leads to more uniform energy deposition of the target material than Li+ ions. Experiments show that a higher current density of helium ions can be delivered from a plasma source compared to Li+ ions from a hot plate type ion source. He+ beam pulses as high as 200 mA at the peak and 4 μs long were measured from a multi-aperture 7-cm-diameter emission area. Within ±5% variation, the uniform beam area is approximately 6 cm across. Finally, the accelerated and compressed pulsed ion beams can be used for materials studies and isochoric heating of target materials for high energy density physics experiments and WDM studies.},
doi = {10.1063/1.4932569},
journal = {Review of Scientific Instruments},
number = 2,
volume = 87,
place = {United States},
year = {2015},
month = {11}
}

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Cited by: 6 works
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