Polarized H- ion source performance during the 2003 RHIC run

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作者：
Alessi, J
Zelenski, A
Briscoe, B
Gould, O
Kponou, A
LoDestro, V
Raparia, D
Ritter, J
Klenov, V
Kokhanovski, S
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PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 | 2003年
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O412 [相对论、场论]; O572.2 [粒子物理学];
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摘要：
The performance of the RHIC Optically-Pumped Polarized H-Ion Source (OPPIS) for the 2003 run in AGS and RHIC is reviewed. The OPPIS met the RHIC requirement for the beam intensity with the reliable delivery of similar to0.5 mA polarized H- ion current in 400 microsecond pulses (maximum current was 1.5 mA). The beam intensity after the 200 MeV linac was 5-6 *10(11) H-/pulse, which exceeded present RHIC program requirements, even after considerable controlled beam scraping in the Booster to reduce the 6-D emittance in the AGS. Magnetic field shape optimization at the source ionizer cell entrance greatly reduced the extraction high-voltage discharge current in the crossed electric and magnetic fields. As a result, reliable spark free operation was achieved at 7 Hz repetition rate. Polarization optimization studies have resulted in 82 +/- 2% beam polarization as measured in a 200 MeV polarimeter.
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页码：3282 / 3284
页数：3
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