Using Emittance Partitioning Instead of a Laser Heater to Suppress the Microbunch Instability
| Autor: | Bruce E. Carlsten, Nikolai Yampolsky, John W. Lewellen, L. D. Duffy, Quinn R. Marksteiner, Kip Bishofberger |
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| Rok vydání: | 2016 |
| Předmět: |
Physics
Nuclear and High Energy Physics 010308 nuclear & particles physics business.industry Laser 01 natural sciences Instability Linear particle accelerator law.invention Transverse plane Optics Nuclear Energy and Engineering law Phase space 0103 physical sciences Cathode ray Physics::Accelerator Physics Thermal emittance Electrical and Electronic Engineering 010306 general physics business Beam (structure) |
| Zdroj: | IEEE Transactions on Nuclear Science. 63:921-929 |
| ISSN: | 1558-1578 0018-9499 |
| DOI: | 10.1109/tns.2015.2498619 |
| Popis: | At the Linac Coherent Light Source (LCLS) X-ray free-electron laser, a laser “heater” is used to generate an uncorrelated 20-keV energy spread on an electron beam to suppress the microbunching instability in downstream bunch compressors. Here we describe an alternative approach using emittance partitioning, where the increase in energy spread is generated by moving phase space volume from the transverse dimensions into the longitudinal dimension. For LCLS-relevant beam parameters, about a factor of six reduction in the product of both transverse emittances is feasible with the same amount of induced energy spread, with additional improvements possible with an optimized setup. |
| Databáze: | OpenAIRE |
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