Proton bunch self-modulation in plasma with density gradient
We study experimentally the effect of linear plasma density gradients on the self-modulation of a 400 GeV proton bunch. Results show that a positive or negative gradient increases or decreases the number of microbunches and the relative charge per microbunch observed after 10 m of plasma. The measur...
| Main Authors: | , , , , , |
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| Other Authors: | |
| Format: | Journal article |
| Language: | English |
| Published: |
American Physical Society
2020
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| _version_ | 1797101639478280192 |
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| author | Braunmüller, F Nechaeva, T Adli, E Burrows, P Ramjiawan, RL Senes, E |
| author2 | AWAKE Collaboration |
| author_facet | AWAKE Collaboration Braunmüller, F Nechaeva, T Adli, E Burrows, P Ramjiawan, RL Senes, E |
| author_sort | Braunmüller, F |
| collection | OXFORD |
| description | We study experimentally the effect of linear plasma density gradients on the self-modulation of a 400 GeV proton bunch. Results show that a positive or negative gradient increases or decreases the number of microbunches and the relative charge per microbunch observed after 10 m of plasma. The measured modulation frequency also increases or decreases. With the largest positive gradient we observe two frequencies in the modulation power spectrum. Results are consistent with changes in wakefields’ phase velocity due to plasma density gradients adding to the slow wakefields’ phase velocity during self-modulation growth predicted by linear theory. |
| first_indexed | 2024-03-07T05:54:38Z |
| format | Journal article |
| id | oxford-uuid:ea1bfb55-e517-4642-8133-dff54752f3e2 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T05:54:38Z |
| publishDate | 2020 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | oxford-uuid:ea1bfb55-e517-4642-8133-dff54752f3e22022-03-27T10:59:15ZProton bunch self-modulation in plasma with density gradientJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:ea1bfb55-e517-4642-8133-dff54752f3e2EnglishSymplectic ElementsAmerican Physical Society2020Braunmüller, FNechaeva, TAdli, EBurrows, PRamjiawan, RLSenes, EAWAKE CollaborationWe study experimentally the effect of linear plasma density gradients on the self-modulation of a 400 GeV proton bunch. Results show that a positive or negative gradient increases or decreases the number of microbunches and the relative charge per microbunch observed after 10 m of plasma. The measured modulation frequency also increases or decreases. With the largest positive gradient we observe two frequencies in the modulation power spectrum. Results are consistent with changes in wakefields’ phase velocity due to plasma density gradients adding to the slow wakefields’ phase velocity during self-modulation growth predicted by linear theory. |
| spellingShingle | Braunmüller, F Nechaeva, T Adli, E Burrows, P Ramjiawan, RL Senes, E Proton bunch self-modulation in plasma with density gradient |
| title | Proton bunch self-modulation in plasma with density gradient |
| title_full | Proton bunch self-modulation in plasma with density gradient |
| title_fullStr | Proton bunch self-modulation in plasma with density gradient |
| title_full_unstemmed | Proton bunch self-modulation in plasma with density gradient |
| title_short | Proton bunch self-modulation in plasma with density gradient |
| title_sort | proton bunch self modulation in plasma with density gradient |
| work_keys_str_mv | AT braunmullerf protonbunchselfmodulationinplasmawithdensitygradient AT nechaevat protonbunchselfmodulationinplasmawithdensitygradient AT adlie protonbunchselfmodulationinplasmawithdensitygradient AT burrowsp protonbunchselfmodulationinplasmawithdensitygradient AT ramjiawanrl protonbunchselfmodulationinplasmawithdensitygradient AT senese protonbunchselfmodulationinplasmawithdensitygradient |