2010•University of North Texas Digital Library (University of North Texas)Open access
BEAM COMMISSIONING RESULTS FOR THE RFQ AND MEBT OF THE EBIS BASED PREINJECTOR FOR RHIC
Masahiro Okamura, James G. Alessi, Edward N Beebe, Kotaro Kondo, R. Lambiase, R. Lockey, V. LoDestro, M. Mapes, A. McNerney, D. Phillips, Alexander Pikin, D. Raparia, John Ritter, L. Smart, Louis P. Snydstrup, A. Zaltsman, Jun Tamura, A. Schempp, C. Zhang, Janet Schmidt, Markus Vossberg, Takeshi Kanesue
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Abstract
The EBIS based preinjector for both the Relativistic Heavy Ion Collider (RHIC) and NASA Space Radiation Laboratory (NSRL) is now being commissioned at Brookhaven National Laboratory (BNL). In 2008, the RFQ for the project was delivered and commissioned using Test EBIS, which was built to demonstrate the high current EBIS's performance. A dedicated beamline after the RFQ was assembled to confirm the RFQ's performance, and the beam energy was measured by a bending dipole magnet. In November 2009, the RFQ was moved to the final location and the vanes were realigned. The beam commissioning with the RHIC-EBIS was started again during March 2010. The RFQ accelerates ions from 17 keV/u to 300 keV/u and operates at 100.625 MHz. It is followed by a short Medium Energy Beam Transport (MEBT), which consists of four quadrupoles and one buncher cavity. Some temporary diagnostics for this commissioning include an emittance probe, TOF system, fast Faraday cup, and beam current measurement units. As of September 2010, the RFQ and the MEBT show expected performance with He{sup +}, Au{sup 32+} and Fe{sup 20+} beams. Further commissioning for higher intensity beams is in progress.
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