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| Title | Conditions for CSR Microbunching Gain Suppression | |||||
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| Abstract | The coherent synchrotron radiation (CSR) of a high brightness electron beam traversing a series of dipoles, such as transport arcs, may result in phase space degradation. On one hand, the CSR can perturb electron transverse motion in dispersive regions along the beamline, causing emittance growth. On the other hand, the CSR effect on the longitudinal beam dynamics could result in microbunching gain enhancement. For transport arcs, several schemes have been proposed* to suppress the CSR-induced emittance growth. Similarly, several scenarios have been introduced** to suppress CSR-induced microbunching gain, which however mostly aim for linac-based machines. In this paper we try to provide sufficient conditions for suppression of CSR-induced microbunching gain along a transport arc, analogous to*. Several example lattices are presented, with the relevant microbunching analyses carried out by our semi-analytical Vlasov solver***. The simulation results show that lattices satisfying the proposed conditions indeed have microbunching gain suppressed. We expect this analysis can shed light on lattice design approach that could suppress the CSR-induced microbunching gain. | |||||
| Footnotes & References | *D.Douglas et al, JLAB-ACP-14-1751, S.DiMitri et al, PRL (2013), R.Hajima, NIMA (2004), Y.Jiao et al, PRSTAB (2014) **Z.Huang et al, PRSTAB (2004), Saldin et al, NIMA (2004) ***C.Tsai et al, FEL'15 |
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| Funding | Authored by Jefferson Science Associates, LLC under U.S. DOE Contract No. DE-AC05-06OR23177. | |||||
| Paper | download TUOAB02.PDF [1.333 MB / 4 pages] | |||||
| Slides | download TUOAB02_TALK.PDF [6.484 MB] | |||||
| Export | download ※ BibTeX ※ LaTeX ※ Text/Word ※ RIS ※ EndNote | |||||
| Conference | IPAC2016, Busan, Korea | |||||
| Series | International Particle Accelerator Conference (7th) | |||||
| Proceedings | Link to full IPAC2016 Proccedings | |||||
| Session | Contributed Oral Presentations, Beam Dynamics and Electromagnetic Fields | |||||
| Date | 10-May-16 09:30–10:30 | |||||
| Main Classification | 05 Beam Dynamics and Electromagnetic Fields | |||||
| Sub Classification | D06 Coherent and Incoherent Instabilities - Measurements and Countermeasures | |||||
| Keywords | dipole, emittance, lattice, synchrotron, synchrotron-radiation | |||||
| Publisher | JACoW, Geneva, Switzerland | |||||
| Editors | Christine Petit-Jean-Genaz (CERN, Geneva, Switzerland); Dong Eon Kim (PAL, Pohang, Republic of Korea); Kyung Sook Kim (PAL, Pohang, Republic of Korea); In Soo Ko (POSTECH, Pohang, Republic of Korea); Volker RW Schaa (GSI, Darmstadt, Germany) | |||||
| ISBN | 978-3-95450-147-2 | |||||
| Published | June 2016 | |||||
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