| Paper |
Title |
Page |
| THPAN027 |
The Optimum Chromaticity Correction Scheme for Monochromatic and Non-Monochromatic Beam in HESR
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3286 |
| |
- A. N. Chechenin
- Y. Senichev, N. E. Vasyukhin
FZJ, Julich
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The High Energy Storage Ring (HESR) of FAIR project consists of two achromatic arcs and two dispersionless straight sections. Due to the multi-functional purpose of the straight sections their contribution into the total chromaticity of the first and second order exceeds the arc's contribution and can affect on the non-monochromatic beam dynamic aperture. We investigate the optimum sextupole and octupole correction scheme for monochromatic and non-monochromatic beam to reach the larger dynamic aperture.
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| FRPMN019 |
The Regular and Random Multi-Pole Errors Influence on the HESR Dynamic Aperture
|
3949 |
| |
- A. N. Chechenin
- Y. Senichev, N. E. Vasyukhin
FZJ, Julich
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| |
The High Energy Storage Ring has the racetrack lattice, where each arc has the even number of super-periods S and the tune with one unit smaller ν=S-1 in both planes. Due to this fundamental feature the total n-order multi-pole is entirely cancelled and the regular errors can be fully compensated inside of one arc. In case of the random multi-pole errors the dynamic aperture is determined by the structure resonances excitation. We consider both regular and random multi-pole influence on the dynamic aperture and the possible correction scheme.
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