Development of a low-latency, high-precision, beam-based feedback system based on cavity BPMs at the KEK ATF2
A low-latency, intra-train feedback system employing cavity beam position monitors (BPMs) has been developed and tested at the Accelerator Test Facility (ATF2) at KEK. The feedback system can be operated with either position information from a single BPM to provide local beam stabilisation, or by us...
| Main Authors: | , , , , , , , |
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| Format: | Conference item |
| Published: |
Joint Accelerator Conferences Website
2018
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| _version_ | 1797102935842226176 |
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| author | Bett, DR Bodenstein, RMB Bromwich, T Burrows, PN Perry, C Ramjiawan, R Kraljevic, N Christian, GB |
| author_facet | Bett, DR Bodenstein, RMB Bromwich, T Burrows, PN Perry, C Ramjiawan, R Kraljevic, N Christian, GB |
| author_sort | Bett, DR |
| collection | OXFORD |
| description | A low-latency, intra-train feedback system employing cavity beam position monitors (BPMs) has been developed and tested at the Accelerator Test Facility (ATF2) at KEK. The feedback system can be operated with either position information from a single BPM to provide local beam stabilisation, or by using position information from two BPMs to stabilise the beam at an intermediate location. The correction is implemented using a stripline kicker and a custom power amplifier, with the feedback calculations being performed on a digital board built around a Field Programmable Gate Array (FPGA). The addition of indium sealing to the BPMs to increase the cavities’ Q-values has led to improvements to the BPM system resolution, with current measurements of the resolution of order 20 nm. The feedback performance was tested with beam trains of two bunches, separated by 280 ns and with a charge of ~1 nC. For single- (two-)BPM feedback, stabilisation of the beam has been demonstrated to below 50 nm (41 nm). Ongoing work to improve the feedback performance further will be discussed. |
| first_indexed | 2024-03-07T06:12:54Z |
| format | Conference item |
| id | oxford-uuid:f0215736-d463-495e-8ce8-d616025b99ca |
| institution | University of Oxford |
| last_indexed | 2024-03-07T06:12:54Z |
| publishDate | 2018 |
| publisher | Joint Accelerator Conferences Website |
| record_format | dspace |
| spelling | oxford-uuid:f0215736-d463-495e-8ce8-d616025b99ca2022-03-27T11:45:29ZDevelopment of a low-latency, high-precision, beam-based feedback system based on cavity BPMs at the KEK ATF2Conference itemhttp://purl.org/coar/resource_type/c_5794uuid:f0215736-d463-495e-8ce8-d616025b99caSymplectic Elements at OxfordJoint Accelerator Conferences Website2018Bett, DRBodenstein, RMBBromwich, TBurrows, PNPerry, CRamjiawan, RKraljevic, NChristian, GBA low-latency, intra-train feedback system employing cavity beam position monitors (BPMs) has been developed and tested at the Accelerator Test Facility (ATF2) at KEK. The feedback system can be operated with either position information from a single BPM to provide local beam stabilisation, or by using position information from two BPMs to stabilise the beam at an intermediate location. The correction is implemented using a stripline kicker and a custom power amplifier, with the feedback calculations being performed on a digital board built around a Field Programmable Gate Array (FPGA). The addition of indium sealing to the BPMs to increase the cavities’ Q-values has led to improvements to the BPM system resolution, with current measurements of the resolution of order 20 nm. The feedback performance was tested with beam trains of two bunches, separated by 280 ns and with a charge of ~1 nC. For single- (two-)BPM feedback, stabilisation of the beam has been demonstrated to below 50 nm (41 nm). Ongoing work to improve the feedback performance further will be discussed. |
| spellingShingle | Bett, DR Bodenstein, RMB Bromwich, T Burrows, PN Perry, C Ramjiawan, R Kraljevic, N Christian, GB Development of a low-latency, high-precision, beam-based feedback system based on cavity BPMs at the KEK ATF2 |
| title | Development of a low-latency, high-precision, beam-based feedback system based on cavity BPMs at the KEK ATF2 |
| title_full | Development of a low-latency, high-precision, beam-based feedback system based on cavity BPMs at the KEK ATF2 |
| title_fullStr | Development of a low-latency, high-precision, beam-based feedback system based on cavity BPMs at the KEK ATF2 |
| title_full_unstemmed | Development of a low-latency, high-precision, beam-based feedback system based on cavity BPMs at the KEK ATF2 |
| title_short | Development of a low-latency, high-precision, beam-based feedback system based on cavity BPMs at the KEK ATF2 |
| title_sort | development of a low latency high precision beam based feedback system based on cavity bpms at the kek atf2 |
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