RHIC SPIN FLIPPER COMMISSIONING.
An ac dipole with horizontally oriented oscillating magnetic field (spin flipper) was installed in FU-IIC to reverse the spin direction in the presence of two full Siberian snakes, thereby reducing the systematic errors for the spin physics experiments in RHIC. With two full snakes, the spin vector completes one full precession around the vertical direction in two revolutions, and the spin depolarization resonances due to the machine imperfections and betatron oscillations are eliminated. Since the spin flipper provides an oscillating horizontal dipole field, a ''spin resonance'' can occur if the spin flipper frequency is placed in the neighborhood of the spin precession frequency [ 1,2,3]. By slowly sweeping the spin flipper frequency across the spin precession frequency, a full spin flip can be achieved. This paper reports the results of the FZUC spin flipper commissioned during the RHIC 2002 polarized proton run. By running the spin flipper at a slightly different configuration, one can also measure the spin precession tune.
- Research Organization:
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Sponsoring Organization:
- USDOE Office of Energy Research (ER) (US)
- DOE Contract Number:
- AC02-98CH10886
- OSTI ID:
- 797120
- Report Number(s):
- BNL-69233; R&D Project: AD003; KA0202011; TRN: US0201807
- Resource Relation:
- Conference: 2002 PARTICLE ACCELERATOR CONFERENCE, PARIS (FR), 06/02/2002--06/07/2002; Other Information: PBD: 2 Jun 2002
- Country of Publication:
- United States
- Language:
- English
Similar Records
Numerical spin tracking in a synchrotron computer code Spink: Examples (RHIC)
Relativistic Heavy Ion Collider spin flipper commissioning plan