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Title: Extraction of ion beam from laser ion source for direct plasma injection scheme

Journal Article · · Journal of Physics. Conference Series
 [1];  [1];  [1];  [2];  [2];  [3]
  1. Nagaoka University of Technology (Japan)
  2. Brookhaven National Laboratory (BNL), Upton, NY (United States)
  3. Brookhaven National Laboratory (BNL), Upton, NY (United States); Tokyo Institute of Technology (Japan)
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Laser ion sources are expected to be used in various applications of heavy ion beam technology. The plasma direct injection scheme (DPIS) is a method in which ion beams extracted from a laser ion source are directly injected into a radio frequency quadrupole (RFQ) linear accelerator. In this study, a new shape of the plasma electrode with a concave surface for the DPIS was proposed to inject a converging beam to a cavity of RFQ accelerator. This approach allows the use of a large-diameter extraction electrode, which is not limited by the aperture of the RFQ electrode rods. The DPIS, using the concave surface electrode, was employed to accelerate C6+ ion beams. The results indicated that both the beam current and the number of ions increased nearly twice with the proposed electrode shape compared to values obtained with the conventional electrode. This enhancement corresponded to the increased extraction area of the beam.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
National Aeronautics and Space Administration (NASA); USDOE Office of Science (SC), Nuclear Physics (NP)
Grant/Contract Number:
SC0012704
OSTI ID:
2466146
Report Number(s):
BNL--226241-2024-JAAM
Journal Information:
Journal of Physics. Conference Series, Journal Name: Journal of Physics. Conference Series Journal Issue: 1 Vol. 2743; ISSN 1742-6588
Publisher:
IOP PublishingCopyright Statement
Country of Publication:
United States
Language:
English

References (8)

Overview of the NASA space radiation laboratory journal November 2016
Demonstration of an intense lithium beam for forward-directed pulsed neutron generation journal August 2022
Acceleration of heavy ion beams by means of direct injection into RFQ Linac journal February 2002
Measurement of the laser plasma properties of the direct plasma injection method to the RFQ LINAC on the RIKEN laser ion source journal February 2002
Simulation of direct injection scheme for RFQ linac journal February 2002
Nd–YAG laser ion source for direct injection scheme journal May 2004
Direct plasma injection scheme in accelerators (invited) journal January 2008
Development of C 6+ laser ion source and RFQ linac for carbon ion radiotherapy journal February 2016

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