Effect of undulators on magnet lattice and emittance
| Autor: | Alexei Blednykh, Lutz Wiegart, Belkacem Bacha, Yoshiteru Hidaka, Timur Shaftan, Yongjun Li, Victor Smaluk, Toshiya Tanabe, Oleg Chubar |
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| Rok vydání: | 2019 |
| Předmět: |
Physics
Nuclear and High Energy Physics Physics and Astronomy (miscellaneous) 010308 nuclear & particles physics business.industry Radiant energy Surfaces and Interfaces 01 natural sciences Synchrotron law.invention Optics Beamline law Magnet 0103 physical sciences Cathode ray lcsh:QC770-798 Physics::Accelerator Physics lcsh:Nuclear and particle physics. Atomic energy. Radioactivity Thermal emittance 010306 general physics business Quadrupole magnet Storage ring |
| Zdroj: | Physical Review Accelerators and Beams, Vol 22, Iss 12, p 124001 (2019) |
| ISSN: | 2469-9888 |
| Popis: | NSLS-II is now one of the brightest synchrotron light sources worldwide, in user operations since 2014. Currently, 20 light-generating insertion devices (IDs) are installed: 3 damping wigglers and 17 undulators of various types. These devices introduce significant distortions into the magnet lattice of the storage ring. For each ID, the distortions have been locally corrected using quadrupole magnets located nearby the ID. The insertion devices have also a significant impact on the electron beam emittance. Precise measurements of the emittance were carried out at the Coherent Hard X-ray beamline for three different lattices: without IDs, with 3 pairs of damping wigglers only, and with all IDs. A minimum horizontal emittance of 0.76 nm was achieved. The radiation energy loss and relative energy spread were also measured using a streak-camera. The measured data show good agreement with analytical formulas and numerical simulations. |
| Databáze: | OpenAIRE |
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