Early transverse decoherence of bunches with space charge
The transverse decoherence of injected bunches is an important phenomenon in synchrotrons and storage rings. The initial stage of this process determines the transverse emittance blowup, which should be taken into account for the design of feedback systems, for example. The interplay of different hi...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
American Physical Society
2016-12-01
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| Series: | Physical Review Accelerators and Beams |
| Online Access: | http://doi.org/10.1103/PhysRevAccelBeams.19.124201 |
| _version_ | 1818193975303995392 |
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| author | Ivan Karpov Vladimir Kornilov Oliver Boine-Frankenheim |
| author_facet | Ivan Karpov Vladimir Kornilov Oliver Boine-Frankenheim |
| author_sort | Ivan Karpov |
| collection | DOAJ |
| description | The transverse decoherence of injected bunches is an important phenomenon in synchrotrons and storage rings. The initial stage of this process determines the transverse emittance blowup, which should be taken into account for the design of feedback systems, for example. The interplay of different high-intensity effects can strongly affect the initial decoherence stage. We present a model that explains decoherence and emittance growth with chromaticity, space charge, and image charges within the first synchrotron period. We compare the model for different combinations of parameters with self-consistent particle tracking simulations and measurements in the SIS18 synchrotron at GSI Darmstadt. Generally, space charge slows down the decoherence process and can cause the loss of decoherence. Chromaticity and image charges can partly compensate this loss and restore the decoherence. We also analyze the single-particle excitation driven by space charge during the decoherence process. Particles gain large amplitudes from the coherent beam oscillation, which leads to halo buildup and losses. |
| first_indexed | 2024-12-12T00:54:56Z |
| format | Article |
| id | doaj.art-341862cfe2374da68ac489e0efd142ff |
| institution | Directory Open Access Journal |
| issn | 2469-9888 |
| language | English |
| last_indexed | 2024-12-12T00:54:56Z |
| publishDate | 2016-12-01 |
| publisher | American Physical Society |
| record_format | Article |
| series | Physical Review Accelerators and Beams |
| spelling | doaj.art-341862cfe2374da68ac489e0efd142ff2022-12-22T00:43:53ZengAmerican Physical SocietyPhysical Review Accelerators and Beams2469-98882016-12-01191212420110.1103/PhysRevAccelBeams.19.124201Early transverse decoherence of bunches with space chargeIvan KarpovVladimir KornilovOliver Boine-FrankenheimThe transverse decoherence of injected bunches is an important phenomenon in synchrotrons and storage rings. The initial stage of this process determines the transverse emittance blowup, which should be taken into account for the design of feedback systems, for example. The interplay of different high-intensity effects can strongly affect the initial decoherence stage. We present a model that explains decoherence and emittance growth with chromaticity, space charge, and image charges within the first synchrotron period. We compare the model for different combinations of parameters with self-consistent particle tracking simulations and measurements in the SIS18 synchrotron at GSI Darmstadt. Generally, space charge slows down the decoherence process and can cause the loss of decoherence. Chromaticity and image charges can partly compensate this loss and restore the decoherence. We also analyze the single-particle excitation driven by space charge during the decoherence process. Particles gain large amplitudes from the coherent beam oscillation, which leads to halo buildup and losses.http://doi.org/10.1103/PhysRevAccelBeams.19.124201 |
| spellingShingle | Ivan Karpov Vladimir Kornilov Oliver Boine-Frankenheim Early transverse decoherence of bunches with space charge Physical Review Accelerators and Beams |
| title | Early transverse decoherence of bunches with space charge |
| title_full | Early transverse decoherence of bunches with space charge |
| title_fullStr | Early transverse decoherence of bunches with space charge |
| title_full_unstemmed | Early transverse decoherence of bunches with space charge |
| title_short | Early transverse decoherence of bunches with space charge |
| title_sort | early transverse decoherence of bunches with space charge |
| url | http://doi.org/10.1103/PhysRevAccelBeams.19.124201 |
| work_keys_str_mv | AT ivankarpov earlytransversedecoherenceofbuncheswithspacecharge AT vladimirkornilov earlytransversedecoherenceofbuncheswithspacecharge AT oliverboinefrankenheim earlytransversedecoherenceofbuncheswithspacecharge |