Orbit correction in the long arcs of the Superconducting Super Collider (SSC)
In the SSC, it is envisioned that there will be a horizontal orbit corrector at each focussing quadrupole (QF), a vertical corrector at each defocussing quadrupole (QD) and a beam position monitor (BPM) at each QF and QD. For each plane, therefore, there are one corrector and two BPM's per cell. Since there are about 420 cells in the SSC, a straightforward orbit correction requires inverting an 420 {times} 420 matrix in which all elements are in general nonzero. This can be avoided by applying a beam bump technique. We will summarize the result of the beam-bump method. Section 3 of this paper gives our study results using this technique for the case of a long string of FODO cells. Section 4 applies these study results to estimate for the SSC the rms corrector strength needed for orbit correction, and the rms orbit distortion after correction. The orbit corrector strength suggested for the SSC is 10 times the rms value and agrees with a previous estimate.
- Research Organization:
- Lawrence Berkeley Lab., CA (USA). SSC Central Design Group
- Sponsoring Organization:
- DOE/ER
- DOE Contract Number:
- AC02-89ER40486
- OSTI ID:
- 7019598
- Report Number(s):
- SSC-48; ON: DE90014009; TRN: 90-023117
- Country of Publication:
- United States
- Language:
- English
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