| Autor: |
F. Pilat, T. Sen, R. Stiening, D.M. Ritson, Y. Nosochkov |
| Rok vydání: |
2002 |
| Předmět: |
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| Zdroj: |
Proceedings of International Conference on Particle Accelerators. |
| DOI: |
10.1109/pac.1993.308987 |
| Popis: |
We address the issue of correcting higher order chromaticities of the collider with one or more low /spl beta/ insertions. The chromaticity contributed by the interaction regions (IRs) depends crucially on the maximum value of /spl beta/ in the two IRs in a cluster, the phase advance between adjacent interaction points (IPs), and the choice of global tune. We propose a correction scheme in which the linear chromaticity is corrected by a global distribution of sextupoles and the second order chromaticity of each IR is corrected by a more local set of sextupoles. Compared to the case where only the linear chromaticity is corrected, this configuration increases the momentum aperture more than three times and also reduces the /spl beta/ heat by this factor. With this scheme, the tune can be chosen to satisfy other constraints and the two IRs in a cluster can be operated independently at different luminosities without affecting the chromatic properties of the ring. > |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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