Cargando…
A 4 GS/s feedback processing system for control of intra-bunch instabilities
We present the architecture and implementation overview of a digital signal processing system developed to study control of electron cloud and transverse mode coupling instabilities in the CERN SPS. The system is based on a reconfigurable processing architecture which samples vertical bunch motion a...
Autores principales: | , , , , , , , |
---|---|
Lenguaje: | eng |
Publicado: |
2013
|
Materias: | |
Acceso en línea: | http://cds.cern.ch/record/1743044 |
_version_ | 1780942766202683392 |
---|---|
author | Fox, J D Cesaratto, J M Dusatko, J Olsen, J Pollock, K Rivetta, C Turgut, O Hofle, W |
author_facet | Fox, J D Cesaratto, J M Dusatko, J Olsen, J Pollock, K Rivetta, C Turgut, O Hofle, W |
author_sort | Fox, J D |
collection | CERN |
description | We present the architecture and implementation overview of a digital signal processing system developed to study control of electron cloud and transverse mode coupling instabilities in the CERN SPS. The system is based on a reconfigurable processing architecture which samples vertical bunch motion and applies correction signals at a 4 GS/s rate, allowing 16 samples across a single 5 ns SPS RF bucket. The system requires wideband beam pickup(s) and vertical kicker structure(s) with GHz bandwidth. This demonstration system implements a general purpose 16 tap FIR control filter for each sample. We present results from SPS machine studies showing the impact of wideband feedback to excite/damp internal modes of vertical motion as well as stabilize an unstable beam. These results highlight the challenges of intra-bunch feedback and show proof of principle feasibility of the architecture. |
id | cern-1743044 |
institution | Organización Europea para la Investigación Nuclear |
language | eng |
publishDate | 2013 |
record_format | invenio |
spelling | cern-17430442022-08-17T13:31:58Zhttp://cds.cern.ch/record/1743044engFox, J DCesaratto, J MDusatko, JOlsen, JPollock, KRivetta, CTurgut, OHofle, WA 4 GS/s feedback processing system for control of intra-bunch instabilitiesAccelerators and Storage RingsWe present the architecture and implementation overview of a digital signal processing system developed to study control of electron cloud and transverse mode coupling instabilities in the CERN SPS. The system is based on a reconfigurable processing architecture which samples vertical bunch motion and applies correction signals at a 4 GS/s rate, allowing 16 samples across a single 5 ns SPS RF bucket. The system requires wideband beam pickup(s) and vertical kicker structure(s) with GHz bandwidth. This demonstration system implements a general purpose 16 tap FIR control filter for each sample. We present results from SPS machine studies showing the impact of wideband feedback to excite/damp internal modes of vertical motion as well as stabilize an unstable beam. These results highlight the challenges of intra-bunch feedback and show proof of principle feasibility of the architecture.oai:cds.cern.ch:17430442013 |
spellingShingle | Accelerators and Storage Rings Fox, J D Cesaratto, J M Dusatko, J Olsen, J Pollock, K Rivetta, C Turgut, O Hofle, W A 4 GS/s feedback processing system for control of intra-bunch instabilities |
title | A 4 GS/s feedback processing system for control of intra-bunch instabilities |
title_full | A 4 GS/s feedback processing system for control of intra-bunch instabilities |
title_fullStr | A 4 GS/s feedback processing system for control of intra-bunch instabilities |
title_full_unstemmed | A 4 GS/s feedback processing system for control of intra-bunch instabilities |
title_short | A 4 GS/s feedback processing system for control of intra-bunch instabilities |
title_sort | 4 gs/s feedback processing system for control of intra-bunch instabilities |
topic | Accelerators and Storage Rings |
url | http://cds.cern.ch/record/1743044 |
work_keys_str_mv | AT foxjd a4gssfeedbackprocessingsystemforcontrolofintrabunchinstabilities AT cesarattojm a4gssfeedbackprocessingsystemforcontrolofintrabunchinstabilities AT dusatkoj a4gssfeedbackprocessingsystemforcontrolofintrabunchinstabilities AT olsenj a4gssfeedbackprocessingsystemforcontrolofintrabunchinstabilities AT pollockk a4gssfeedbackprocessingsystemforcontrolofintrabunchinstabilities AT rivettac a4gssfeedbackprocessingsystemforcontrolofintrabunchinstabilities AT turguto a4gssfeedbackprocessingsystemforcontrolofintrabunchinstabilities AT hoflew a4gssfeedbackprocessingsystemforcontrolofintrabunchinstabilities AT foxjd 4gssfeedbackprocessingsystemforcontrolofintrabunchinstabilities AT cesarattojm 4gssfeedbackprocessingsystemforcontrolofintrabunchinstabilities AT dusatkoj 4gssfeedbackprocessingsystemforcontrolofintrabunchinstabilities AT olsenj 4gssfeedbackprocessingsystemforcontrolofintrabunchinstabilities AT pollockk 4gssfeedbackprocessingsystemforcontrolofintrabunchinstabilities AT rivettac 4gssfeedbackprocessingsystemforcontrolofintrabunchinstabilities AT turguto 4gssfeedbackprocessingsystemforcontrolofintrabunchinstabilities AT hoflew 4gssfeedbackprocessingsystemforcontrolofintrabunchinstabilities |