RHIC VERTICAL AC DIPOLE COMMISSIONING.

Conference · Sun Jun 02 00:00:00 EDT 2002

OSTI ID:797119

BAI, M ^[1]; DELONG, J; HOFF, L; PAI, C; PEGGS, S; PIACENTINO, J; OERTER, B; ODDO, P; ROSER, T; SATOGATA, T; TRBOJEVIC, D; ZALTSMAN, A

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1. BROOKHAVEN NATIONAL LABORATORY

The RHIC vertical ac dipole was installed in the summer of 2001. The magnet is located in the interaction region between sector 3 and sector 4 common to both beams. The resonant frequency of the ac dipole was first configured to be around half of the beam revolution frequency to act as a spin flipper. At the end of the RHIC 2002 run, the ac dipole frequency was reconfigured for linear optics studies. A 0.35 mm driven betatron oscillation was excited with the vertical ac dipole and the vertical betatron functions and phase advances at each beam position monitor (BPM) around the RHIC yellow ring were measured using the excited coherence. We also recorded horizontal turn-by-turn beam positions at each BPM location to investigate coupling effects. Analysis algorithms and measurement results are presented.

• Research Organization: Brookhaven National Lab., Upton, NY (US)
• Sponsoring Organization: USDOE Office of Energy Research (ER) (US)
• DOE Contract Number: AC02-98CH10886
• OSTI ID: 797119
• Report Number(s): BNL--68978; KA0202011
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
ACCELERATORS
ALGORITHMS
BEAM POSITION
BETATRON OSCILLATIONS
BETATRONS
COMMISSIONING
DIPOLES
MAGNETS
MONITORS
OPTICS
SPIN