Commissioning of the EBIS-based heavy ion preinjector at Brookhaven Page: 3 of 7
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COMMISSIONING OF THE EBIS-BASED HEAVY ION PREINJECTOR
AT BROOKHAVEN*
J. Alessi#, E. Beebe, S. Binello, L. Hoff, K. Kondo, R. Lambiase, V LoDestro, M. Mapes, A.
McNerney, J. Morris, M. Okamura, A. I. Pikin, D. Raparia, J. Ritter, L. Smart, L. Snydstrup, M.
Wilinski, A. Zaltsman,
BNL, Upton, NY 11973 USA
A. Schempp, U. Ratzinger,
IAP, Frankfurt am Main, Germany
T. Kanesue, Kyushu Univ., Ito, Fukuoka 819-0395, JapanAbstract
The status is presented of the commissioning of a new
heavy ion preinjector at Brookhaven National Laboratory.
This preinjector uses an Electron Beam Ion Source
(EBIS), and an RFQ and IH Linac, both operating at
100.625 MHz, to produce 2 MeV/u ions of any species for
use, after further acceleration, at the Relativistic Heavy
Ion Collider (RHIC) and the NASA Space Radiation
Laboratory (NSRL). Among the increased capabilities
provided by this preinjector are the ability to produce ions
of any species, and the ability to switch between multiple
species in 1 second, to simultaneously meet the needs of
both science programs. For initial setup, helium beam
from EBIS was injected and circulated in the Booster
synchrotron. Following this, accelerated Au32+ and Fe20+
beams were transported to the Booster injection point,
fulfilling DOE requirements for project completion.
INTRODUCTION
A new EBIS-based, high charge state heavy ion
preinjector is being commissioned at Brookhaven
National Laboratory (BNL). The preinjector will provide
increased flexibility to handle the simultaneous needs of
the RHIC and NASA programs, since it will allow one to
switch rapidly between ion species injected into the
accelerator chain. It will also provide ions not presentlyavailable from the Tandem Van de Graaff preinjectors,
such as noble gas ions for NASA, and uranium ions for
RHIC. The RFQ and linac which are used for
acceleration are a simpler and more modern technology
than the Tandems. Also, by producing the desired high
charge states directly in the EBIS, two stripping stages are
eliminated. Finally, since the new preinjector is located
close to the injection point of the Booster synchrotron,
one eliminates the need for the 860 m long transport line
between the Tandem and Booster. While the EBIS-based
preinjector will meet all the needs of RHIC and NSRL,
the Tandem Van de Graaffs will continue to operate for
the active outside user program. Parameters for the
preinjector are given in Table 1. The preinjector is shown
schematically in Fig. 1.
Table 1: Preinjector Parameters.
Ions He - U
Q/m >1/6
Current > 1.5 emA
Pulse length 10-40 s (for few-turn injection)
Rep rate 5 Hz
EBIS output energy 17 keV/u
RFQ output energy 300 keV/u
Linac output energy 2 MeV/u
Time to switch species 1 secondEBIS RFQ
BOOSTER
DIPOLE
LINAC BEAMTRANSPORTLINEFigure 1: Layout of the EBIS Preinjector
*Work supported by the US Department of Energy and the National
Aeronautics and Space Administration
alessigbnl.gov
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Alessi, J.; Beebe, E.; Binello, S.; Hoff, L.; Kondo, K.; Lambiase, R. et al. Commissioning of the EBIS-based heavy ion preinjector at Brookhaven, article, September 12, 2010; United States. (https://digital.library.unt.edu/ark:/67531/metadc837875/m1/3/: accessed July 18, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.