| Article | |
| Report number | SLAC-PUB-11259 |
| Title | Simulation of HOM Leakage in the PEP-II Bellows |
| Author(s) | Ng, Cho-Kuen ; Folwell, Nathan T ; Ge, Lixin ; Langton, Jay ; Lee, Lie-Quan ; Novokhatski, Alexander |
| Affiliation | (SLAC) |
| Publication | 2005 |
| Imprint | 2005 |
| Number of pages | 3 |
| In: | 21st IEEE Particle Accelerator Conference, Knoxville, TN, USA, 16 - 20 May 2005, pp.2050 |
| Abstract | An important factor that limits the PEP-II from operating at higher currents is higher-order-mode (HOM) heating of the bellows. One source of HOM heating is the formation of trapped modes at the bellows as a result of geometry variation in the vacuum chamber, for example, the masking near the central vertex chamber. Another source comes from HOMs generated upstream that leak through the gaps between the bellows fingers. Modeling the fine details of the bellows and the surrounding geometry requires the resolution and accuracy only possible with a large number of mesh points on an unstructured grid. We use the parallel finite element eigensolver Omega3P for trapped mode calculations, and the S-matrix solver S3P for transmission analysis. The damping of the HOMs by the use of absorbers inside the bellows will be investigated. |
Corresponding record in: Inspire
Element opprettet 2005-07-06, sist endret 2024-02-23
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