Interaction region quadrupole roll and solenoid misalignment in RHIC
The main sources of linear coupling in the interaction regions (IRs) of the Relativistic Heavy Ion Collider (RHIC) are IR quadrupole roll errors and coupling from the PHENIX experiment solenoid. The magnitudes of these effects are estimated. We show that coupling from the IR quadrupole roll errors can be locally corrected with skew quadrupole trims, using the local vertical dispersion in the IR as a convenient diagnostic. Coupling from the PHENIX solenoid is shown to be negligible. Solenoidal misalignment effects are small compared to the effects of a 3.85 milliradian closed orbit angle offset required when protons collide with gold ions. These effects are shown to modify local dipole corrector strengths to first order in the solenoid strength.
- Research Organization:
- Brookhaven National Lab., Upton, NY (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC02-76CH00016
- OSTI ID:
- 10176757
- Report Number(s):
- BNL-49854; CONF-940618-46; ON: DE94017402
- Resource Relation:
- Conference: EPAC 94 - 4. European particle accelerator conference,London (United Kingdom),27 Jun - 1 Jul 1994; Other Information: PBD: [1994]
- Country of Publication:
- United States
- Language:
- English
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