| Autor: |
A. Blednykh, M. Blaskiewicz, R. Lindberg, D. Zhou |
| Jazyk: |
angličtina |
| Rok vydání: |
2023 |
| Předmět: |
|
| Zdroj: |
Physical Review Accelerators and Beams, Vol 26, Iss 5, p 051002 (2023) |
| Druh dokumentu: |
article |
| ISSN: |
2469-9888 |
| DOI: |
10.1103/PhysRevAccelBeams.26.051002 |
| Popis: |
The contribution of coherent wiggler radiation (CWR) to the microwave instability threshold in wiggler-dominated storage rings such as damping rings for colliders is discussed in detail. Three different coherent wiggler radiation impedance models are considered: the free-space steady-state model, the parallel-plates shielding steady-state model, and the rectangular-chamber shielding model. The field dynamics of CWR are compared, showing that the broad-band unshielded CWR becomes dominated by resonant structures when chamber shielding is considered. To suppress the narrow-band impedance in damping wigglers with chamber shielding, we propose employing a detuned damping wiggler. A new, simple, analytical method of solving the dispersion relation and detecting the CWR-driven microwave instability threshold is presented. The theory is compared with the numerical simulations of a Vlasov-Fokker-Planck solver for the Electron Ion Collider backup storage ring cooler and confirms that the microwave instability threshold gets higher for negative momentum compaction. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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