Overcoming Intrinsic Depolarizing Resonance with Energy-jump
Abstract
In the recent polarized proton runs in the AGS, a 5% partial snake is used successfully to overcome the imperfection depolarizing resonances. Polarized proton beam was accelerated up to the required RHIC injection energy of 25GeV. However, significant amount of polarization was lost at 0+ν_y, 12+νy and 36+ν_y, which is believed to be partially due to coupling resonances. To overcome the coupling resonance, an energy-jump was generated by rapidly changing the beam circumference using the powerful AGS rf system. It clearly demonstrates that the novel energy-jump method can successfully overcome coupling resonances and weak intrinsic resonances.
- Publication:
-
APS Meeting Abstracts
- Pub Date:
- May 1997
- Bibcode:
- 1997APS..PAC..2V31H