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Title: Effect of solenoid in various conditions of laser ion source at Brookhaven National Laboratory

Authors:
; ; ;
Publication Date:
Research Org.:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
OSTI Identifier:
1257948
Report Number(s):
BNL-112226-2016-CP
Journal ID: ISSN 0034--6748; R&D Project: KBCH139; 18033; KB0202011
DOE Contract Number:
SC00112704
Resource Type:
Conference
Resource Relation:
Journal Volume: 87; Journal Issue: 2; Conference: 16th International Conference on Ion Sources (ICIS2015); New York Marriott Marquis Hotel, New York, NY 10036; 20150823 through 20150828
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS

Citation Formats

Ikeda S., Okamura M., Kumaki, M., and Kanesue, T.. Effect of solenoid in various conditions of laser ion source at Brookhaven National Laboratory. United States: N. p., 2015. Web. doi:10.1063/1.4935785.
Ikeda S., Okamura M., Kumaki, M., & Kanesue, T.. Effect of solenoid in various conditions of laser ion source at Brookhaven National Laboratory. United States. doi:10.1063/1.4935785.
Ikeda S., Okamura M., Kumaki, M., and Kanesue, T.. Sun . "Effect of solenoid in various conditions of laser ion source at Brookhaven National Laboratory". United States. doi:10.1063/1.4935785. https://www.osti.gov/servlets/purl/1257948.
@article{osti_1257948,
title = {Effect of solenoid in various conditions of laser ion source at Brookhaven National Laboratory},
author = {Ikeda S. and Okamura M. and Kumaki, M. and Kanesue, T.},
abstractNote = {},
doi = {10.1063/1.4935785},
journal = {},
number = 2,
volume = 87,
place = {United States},
year = {Sun Aug 23 00:00:00 EDT 2015},
month = {Sun Aug 23 00:00:00 EDT 2015}
}

Conference:
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  • In the laser ion source (LIS) at the Brookhaven National Laboratory (BNL), a solenoid is used to guide the laser ablation plasma and modulate the extracted beam current. Many types of ion species are guided. In some cases, the plasma plume is injected into the solenoid away from the solenoidal axis. To investigate the effects of the solenoid on the beam extracted from the plasma that has different properties, the beam current was measured in the setup of the LIS at the BNL. The beam current of Li, Al, Si, Fe, and Au increased when the magnetic field was applied.more » For most of the species the peak current and the total charge within a single beam pulse increased around 10 times with a magnetic field less than 100 G. In addition, for some species the rate of increase of the peak currents became smaller when the magnetic flux densities were larger than certain values depending on the species. In this case, the current waveforms were distorted. At the same magnetic field value, the field was more effective on lighter species than on heavier ones. When plasma was injected offset from the axis of the solenoid, peak current and total charge became half of those without offset. The experimental data are useful for the operation of the LIS at the BNL.« less
  • The electron beam ion source (EBIS) preinjector at Brookhaven National Laboratory (BNL) is a new heavy ion-preinjector for relativistic heavy ion collider (RHIC) and NASA Space Radiation Laboratory (NSRL). Laser ion source (LIS) is a primary ion source provider for the BNL-EBIS. LIS with solenoid at the plasma drift section can realize the low peak current ({approx}100 {micro}A) with high charge ({approx}10 nC) which is the BNL-EBIS requirement. The gap between two solenoids does not cause serious plasma current decay, which helps us to make up the BNL-EBIS beamline.
  • The electron beam ion source (EBIS) preinjector at Brookhaven National Laboratory (BNL) is a new heavy ion-preinjector for relativistic heavy ion collider (RHIC) and NASA Space Radiation Laboratory (NSRL). Laser ion source (LIS) is a primary ion source provider for the BNL-EBIS. LIS with solenoid at the plasma drift section can realize the low peak current ({approx}100 {mu}A) with high charge ({approx}10 nC) which is the BNL-EBIS requirement. The gap between two solenoids does not cause serious plasma current decay, which helps us to make up the BNL-EBIS beamline.
  • Extracted ion beams from the test laser ion source (LIS) were transported through a test beam transport line which is almost identical to the actual primary beam transport in the current electron beam ion source apparatus. The tested species were C, Al, Si, Cr, Fe, Cu, Ag, Ta, and Au. The all measured beam currents fulfilled the requirements. However, in the case of light mass ions, the recorded emittance shapes have larger aberrations and the RMS values are higher than 0.06 π mm mrad, which is the design goal. Since we have margin to enhance the beam current, if we then allowmore » some beam losses at the injection point, the number of the single charged ions within the acceptance can be supplied. For heaver ions like Ag, Ta, and Au, the LIS showed very good performance.« less