A METHOD TO MEASURE THE SKEW QUADUPOLE STRENGTHS IN THE SIS-18 USING TWO BPMS.
In the GSI synchrotron SIS-18 a new set of skew quadrupoles has been installed to improve the multi-turn-injection. Anew method based on the measurement of the resonance driving terms (RDT) has been proposed to cross-check the nominal values and polarities of their gradients. Once a beam is transversely kicked, it experiences oscillations whose spectrum contains both the betatron tune line and secondary lines. The amplitude of each line is proportional to the strength of the multipoles, such as skew quadrupoles and sextupoles, present in the lattice. In this paper, a recursive algorithm to derive the magnet strength from the spectral lines and the application of this method to the eight skew quadrupoles in the SIS-18 are presented.
- Research Organization:
- BROOKHAVEN NATIONAL LABORATORY (US)
- Sponsoring Organization:
- DOE/OFFICE OF SCIENCE (US)
- DOE Contract Number:
- AC02-98CH10886
- OSTI ID:
- 15008007
- Report Number(s):
- BNL-72052-2004-CP; R&D Project: AD-002-ADOP; KB020204; TRN: US0402954
- Resource Relation:
- Conference: 2004 EUROPEAN PARTICLE ACCELERATOR CONFERENCE (EPAC-04), LUCERNE (CH), 07/05/2004--07/09/2004; Other Information: PBD: 5 Jul 2004
- Country of Publication:
- United States
- Language:
- English
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