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

Abstract

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{sup +} ions leads to more uniform energy deposition of the target material than Li{sup +} ions. Experiments show that a higher current density of helium ions can be delivered from a plasma source compared to Li{sup +} ions from a hot plate type ion source. He{sup +} 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. 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]
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  1. Lawrence Berkeley National Laboratory, Berkeley, California 94720 (United States)
Publication Date:
OSTI Identifier:
22483005
Resource Type:
Journal Article
Journal Name:
Review of Scientific Instruments
Additional Journal Information:
Journal Volume: 87; Journal Issue: 2; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0034-6748
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; ACCELERATORS; BEAM PULSERS; BRAGG CURVE; CURRENT DENSITY; ENERGY ABSORPTION; ENERGY DENSITY; ENERGY LOSSES; HELIUM IONS; ION BEAMS; ION SOURCES; KINETIC ENERGY; LITHIUM IONS; MATERIALS; MEV RANGE 01-10; PULSES

Citation Formats

Ji, Q., E-mail: qji@lbl.gov, Seidl, P. A., Waldron, W. L., Takakuwa, J. H., Persaud, A., Schenkel, T., Friedman, A., Grote, D. P., Barnard, J. J., and Lawrence Livermore National Laboratory, Livermore, California 94550. Development and testing of a pulsed helium ion source for probing materials and warm dense matter studies. United States: N. p., 2016. Web. doi:10.1063/1.4932569.
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Ji, Q., E-mail: qji@lbl.gov, Seidl, P. A., Waldron, W. L., Takakuwa, J. H., Persaud, A., Schenkel, T., Friedman, A., Grote, D. P., Barnard, J. J., & Lawrence Livermore National Laboratory, Livermore, California 94550. Development and testing of a pulsed helium ion source for probing materials and warm dense matter studies. United States. https://doi.org/10.1063/1.4932569
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Ji, Q., E-mail: qji@lbl.gov, Seidl, P. A., Waldron, W. L., Takakuwa, J. H., Persaud, A., Schenkel, T., Friedman, A., Grote, D. P., Barnard, J. J., and Lawrence Livermore National Laboratory, Livermore, California 94550. 2016. "Development and testing of a pulsed helium ion source for probing materials and warm dense matter studies". United States. https://doi.org/10.1063/1.4932569.
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@article{osti_22483005,
title = {Development and testing of a pulsed helium ion source for probing materials and warm dense matter studies},
author = {Ji, Q., E-mail: qji@lbl.gov and Seidl, P. A. and Waldron, W. L. and Takakuwa, J. H. and Persaud, A. and Schenkel, T. and Friedman, A. and Grote, D. P. and Barnard, J. J. and Lawrence Livermore National Laboratory, Livermore, California 94550},
abstractNote = {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{sup +} ions leads to more uniform energy deposition of the target material than Li{sup +} ions. Experiments show that a higher current density of helium ions can be delivered from a plasma source compared to Li{sup +} ions from a hot plate type ion source. He{sup +} 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. 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},
url = {https://www.osti.gov/biblio/22483005}, journal = {Review of Scientific Instruments},
issn = {0034-6748},
number = 2,
volume = 87,
place = {United States},
year = {Mon Feb 15 00:00:00 EST 2016},
month = {Mon Feb 15 00:00:00 EST 2016}
}
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Journal Article:
https://doi.org/10.1063/1.4932569
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Works referencing / citing this record:

Optimizing beam transport in rapidly compressing beams on the neutralized drift compression experiment – II
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Irradiation of materials with short, intense ion pulses at NDCX-II
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Source-to-accelerator quadrupole matching section for a compact linear accelerator
journal, May 2018

Demonstration of waferscale voltage amplifier and electrostatic quadrupole focusing array for compact linear accelerators
journal, May 2019

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