Beyond the limits of 1D coherent synchrotron radiation
An understanding of collective effects is of fundamental importance for the design and optimisation of the performance of modern accelerators. In particular, the design of an accelerator with strict requirements on the beam quality, such as a free electron laser (FEL), is highly dependent on a corre...
| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
IOP Publishing
2018-01-01
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| Series: | New Journal of Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/1367-2630/aad21d |
| _version_ | 1797750598432456704 |
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| author | A D Brynes P Smorenburg I Akkermans E Allaria L Badano S Brussaard M Danailov A Demidovich G De Ninno D Gauthier G Gaio S B van der Geer L Giannessi M J de Loos N S Mirian G Penco P Rebernik F Rossi I Setija S Spampinati C Spezzani M Trovò P H Williams S Di Mitri |
| author_facet | A D Brynes P Smorenburg I Akkermans E Allaria L Badano S Brussaard M Danailov A Demidovich G De Ninno D Gauthier G Gaio S B van der Geer L Giannessi M J de Loos N S Mirian G Penco P Rebernik F Rossi I Setija S Spampinati C Spezzani M Trovò P H Williams S Di Mitri |
| author_sort | A D Brynes |
| collection | DOAJ |
| description | An understanding of collective effects is of fundamental importance for the design and optimisation of the performance of modern accelerators. In particular, the design of an accelerator with strict requirements on the beam quality, such as a free electron laser (FEL), is highly dependent on a correspondence between simulation, theory and experiments in order to correctly account for the effect of coherent synchrotron radiation (CSR), and other collective effects. A traditional approach in accelerator simulation codes is to utilise an analytic one-dimensional approximation to the CSR force. We present an extension of the 1D CSR theory in order to correctly account for the CSR force at the entrance and exit of a bending magnet. A limited range of applicability to this solution—in particular, in bunches with a large transverse spot size or offset from the nominal axis—is recognised. More recently developed codes calculate the CSR effect in dispersive regions directly from the Liénard–Wiechert potentials, albeit with approximations to improve the computational time. A new module of the General Particle Tracer code was developed for simulating the effects of CSR, and benchmarked against other codes. We experimentally demonstrate departure from the commonly used 1D CSR theory for more extreme bunch length compression scenarios at the FERMI FEL facility. Better agreement is found between experimental data and the codes which account for the transverse extent of the bunch, particularly in more extreme compression scenarios. |
| first_indexed | 2024-03-12T16:36:06Z |
| format | Article |
| id | doaj.art-0d6d4898c2d1476aa12dbc735f06ff66 |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T16:36:06Z |
| publishDate | 2018-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj.art-0d6d4898c2d1476aa12dbc735f06ff662023-08-08T14:52:38ZengIOP PublishingNew Journal of Physics1367-26302018-01-0120707303510.1088/1367-2630/aad21dBeyond the limits of 1D coherent synchrotron radiationA D Brynes0https://orcid.org/0000-0003-2343-7566P Smorenburg1I Akkermans2E Allaria3https://orcid.org/0000-0001-9570-6361L Badano4S Brussaard5M Danailov6A Demidovich7G De Ninno8D Gauthier9G Gaio10S B van der Geer11L Giannessi12M J de Loos13N S Mirian14G Penco15https://orcid.org/0000-0002-4900-6513P Rebernik16F Rossi17I Setija18S Spampinati19C Spezzani20M Trovò21P H Williams22S Di Mitri23ASTeC, STFC Daresbury Laboratory, Daresbury, Warrington, WA4 4AD Cheshire, United Kingdom; Cockcroft Institute, Sci-Tech Daresbury, Keckwick Lane, Daresbury, Warrington WA4 4AD, United Kingdom; Department of Physics, University of Liverpool , Liverpool, L69 7ZE, United KingdomASML Netherlands B.V., 5504 DR Veldhoven, The NetherlandsASML Netherlands B.V., 5504 DR Veldhoven, The NetherlandsElettra-Sincrotrone Trieste S.C.p.A., I-34149 Basovizza, Trieste, ItalyElettra-Sincrotrone Trieste S.C.p.A., I-34149 Basovizza, Trieste, ItalyASML Netherlands B.V., 5504 DR Veldhoven, The NetherlandsElettra-Sincrotrone Trieste S.C.p.A., I-34149 Basovizza, Trieste, ItalyElettra-Sincrotrone Trieste S.C.p.A., I-34149 Basovizza, Trieste, ItalyElettra-Sincrotrone Trieste S.C.p.A., I-34149 Basovizza, Trieste, ItalyElettra-Sincrotrone Trieste S.C.p.A., I-34149 Basovizza, Trieste, Italy; LIDYL, CEA, CNRS, Université Paris-Saclay , Saclay, F-91191 Gif-sur-Yvette, FranceElettra-Sincrotrone Trieste S.C.p.A., I-34149 Basovizza, Trieste, ItalyPulsar Physics, Burghstraat 47, 5614 BC Eindhoven, The NetherlandsElettra-Sincrotrone Trieste S.C.p.A., I-34149 Basovizza, Trieste, ItalyPulsar Physics, Burghstraat 47, 5614 BC Eindhoven, The NetherlandsElettra-Sincrotrone Trieste S.C.p.A., I-34149 Basovizza, Trieste, ItalyElettra-Sincrotrone Trieste S.C.p.A., I-34149 Basovizza, Trieste, ItalyElettra-Sincrotrone Trieste S.C.p.A., I-34149 Basovizza, Trieste, ItalyElettra-Sincrotrone Trieste S.C.p.A., I-34149 Basovizza, Trieste, ItalyASML Netherlands B.V., 5504 DR Veldhoven, The NetherlandsElettra-Sincrotrone Trieste S.C.p.A., I-34149 Basovizza, Trieste, ItalyElettra-Sincrotrone Trieste S.C.p.A., I-34149 Basovizza, Trieste, ItalyElettra-Sincrotrone Trieste S.C.p.A., I-34149 Basovizza, Trieste, ItalyASTeC, STFC Daresbury Laboratory, Daresbury, Warrington, WA4 4AD Cheshire, United Kingdom; Cockcroft Institute, Sci-Tech Daresbury, Keckwick Lane, Daresbury, Warrington WA4 4AD, United KingdomElettra-Sincrotrone Trieste S.C.p.A., I-34149 Basovizza, Trieste, ItalyAn understanding of collective effects is of fundamental importance for the design and optimisation of the performance of modern accelerators. In particular, the design of an accelerator with strict requirements on the beam quality, such as a free electron laser (FEL), is highly dependent on a correspondence between simulation, theory and experiments in order to correctly account for the effect of coherent synchrotron radiation (CSR), and other collective effects. A traditional approach in accelerator simulation codes is to utilise an analytic one-dimensional approximation to the CSR force. We present an extension of the 1D CSR theory in order to correctly account for the CSR force at the entrance and exit of a bending magnet. A limited range of applicability to this solution—in particular, in bunches with a large transverse spot size or offset from the nominal axis—is recognised. More recently developed codes calculate the CSR effect in dispersive regions directly from the Liénard–Wiechert potentials, albeit with approximations to improve the computational time. A new module of the General Particle Tracer code was developed for simulating the effects of CSR, and benchmarked against other codes. We experimentally demonstrate departure from the commonly used 1D CSR theory for more extreme bunch length compression scenarios at the FERMI FEL facility. Better agreement is found between experimental data and the codes which account for the transverse extent of the bunch, particularly in more extreme compression scenarios.https://doi.org/10.1088/1367-2630/aad21dcoherent synchrotron radiationfree electron lasersaccelerators |
| spellingShingle | A D Brynes P Smorenburg I Akkermans E Allaria L Badano S Brussaard M Danailov A Demidovich G De Ninno D Gauthier G Gaio S B van der Geer L Giannessi M J de Loos N S Mirian G Penco P Rebernik F Rossi I Setija S Spampinati C Spezzani M Trovò P H Williams S Di Mitri Beyond the limits of 1D coherent synchrotron radiation New Journal of Physics coherent synchrotron radiation free electron lasers accelerators |
| title | Beyond the limits of 1D coherent synchrotron radiation |
| title_full | Beyond the limits of 1D coherent synchrotron radiation |
| title_fullStr | Beyond the limits of 1D coherent synchrotron radiation |
| title_full_unstemmed | Beyond the limits of 1D coherent synchrotron radiation |
| title_short | Beyond the limits of 1D coherent synchrotron radiation |
| title_sort | beyond the limits of 1d coherent synchrotron radiation |
| topic | coherent synchrotron radiation free electron lasers accelerators |
| url | https://doi.org/10.1088/1367-2630/aad21d |
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