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Title: Design of target irradiation and diagnostic chamber to study ps-laser generated plasma as a source of singly charged ions for external injection into an electron beam ion source

Abstract

High repetition-rate (~10 kHz) ps-lasers are becoming available on the market with reasonable cost and may offer several advantages compared to ns-lasers by generating nearly continuous beams of singly charged ions appropriate for the “slow” injection mode into the Electron Beam Ion Source (EBIS). To evaluate these advantages, we will perform studies of a ps-laser generated plasma using a laser with a pulse duration of 8 ps and energy up to 5 mJ per pulse. A vacuum chamber equipped with a 3D target positioner, a focusing lens, and a Faraday Cup has been designed and built for this study. Lens-to-target distance variations have been measured using a laser tracker over the whole range of horizontal and vertical translation for all five targets we will use. The variations were found to be within ±150 µm. This level of “target flatness” should be acceptable for our experimental conditions. Ion currents and ion pulse durations of various elements (from Al to Ta) will be measured for different target irradiation conditions (focal spot size and laser pulse energy). The results obtained will allow us to specify all parameters and geometry of a laser ion source based on a ps-laser to provide external ion injectionmore » into the relativistic heavy ion collider EBIS« less

Authors:
ORCiD logo [1];  [1]; ORCiD logo [1]; ORCiD logo [1];  [1];  [2]
  1. Brookhaven National Lab. (BNL), Upton, NY (United States)
  2. Argonne National Lab. (ANL), Argonne, IL (United States)
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
OSTI Identifier:
1599584
Report Number(s):
[BNL-213634-2020-JAAM]
[Journal ID: ISSN 0034-6748]
Grant/Contract Number:  
[SC0012704]
Resource Type:
Accepted Manuscript
Journal Name:
Review of Scientific Instruments
Additional Journal Information:
[ Journal Volume: 91; 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; Laser tracker; Faraday cups; Relativistic Heavy Ion Collider; Ion sources; Laser ablation; Vacuum apparatus

Citation Formats

Kondrashev, S., Beebe, E., Kanesue, T., Okamura, M., Ritter, J., and Scott, R. Design of target irradiation and diagnostic chamber to study ps-laser generated plasma as a source of singly charged ions for external injection into an electron beam ion source. United States: N. p., 2020. Web. doi:10.1063/1.5127833.
Kondrashev, S., Beebe, E., Kanesue, T., Okamura, M., Ritter, J., & Scott, R. Design of target irradiation and diagnostic chamber to study ps-laser generated plasma as a source of singly charged ions for external injection into an electron beam ion source. United States. doi:10.1063/1.5127833.
Kondrashev, S., Beebe, E., Kanesue, T., Okamura, M., Ritter, J., and Scott, R. Tue . "Design of target irradiation and diagnostic chamber to study ps-laser generated plasma as a source of singly charged ions for external injection into an electron beam ion source". United States. doi:10.1063/1.5127833.
@article{osti_1599584,
title = {Design of target irradiation and diagnostic chamber to study ps-laser generated plasma as a source of singly charged ions for external injection into an electron beam ion source},
author = {Kondrashev, S. and Beebe, E. and Kanesue, T. and Okamura, M. and Ritter, J. and Scott, R.},
abstractNote = {High repetition-rate (~10 kHz) ps-lasers are becoming available on the market with reasonable cost and may offer several advantages compared to ns-lasers by generating nearly continuous beams of singly charged ions appropriate for the “slow” injection mode into the Electron Beam Ion Source (EBIS). To evaluate these advantages, we will perform studies of a ps-laser generated plasma using a laser with a pulse duration of 8 ps and energy up to 5 mJ per pulse. A vacuum chamber equipped with a 3D target positioner, a focusing lens, and a Faraday Cup has been designed and built for this study. Lens-to-target distance variations have been measured using a laser tracker over the whole range of horizontal and vertical translation for all five targets we will use. The variations were found to be within ±150 µm. This level of “target flatness” should be acceptable for our experimental conditions. Ion currents and ion pulse durations of various elements (from Al to Ta) will be measured for different target irradiation conditions (focal spot size and laser pulse energy). The results obtained will allow us to specify all parameters and geometry of a laser ion source based on a ps-laser to provide external ion injection into the relativistic heavy ion collider EBIS},
doi = {10.1063/1.5127833},
journal = {Review of Scientific Instruments},
number = [2],
volume = [91],
place = {United States},
year = {2020},
month = {2}
}

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Works referenced in this record:

Reliable operation of the Brookhaven EBIS for highly charged ion production for RHIC and NSRL
conference, January 2015

  • Beebe, E.; Alessi, J.; Binello, S.
  • PROCEEDINGS OF THE XII INTERNATIONAL SYMPOSIUM ON ELECTRON BEAM ION SOURCES AND TRAPS, AIP Conference Proceedings
  • DOI: 10.1063/1.4905394

A hollow cathode ion source for production of primary ions for the BNL electron beam ion source
journal, February 2014

  • Alessi, James; Beebe, Edward; Carlson, Charles
  • Review of Scientific Instruments, Vol. 85, Issue 2
  • DOI: 10.1063/1.4852235

Isotope separator for external ion injection into EBIS
conference, January 2018

  • Kondrashev, S.; Beebe, E.; Coe, B.
  • Proceedings of the 17th International Conference on Ion Sources, AIP Conference Proceedings
  • DOI: 10.1063/1.5053360