1.
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Intra-bunch feedback system developments at DAFNE
/ Drago, Alessandro (LNF, Dafne Light ; Rome U., Tor Vergata) ; Alesini, D. (LNF, Dafne Light) ; Caschera, S. (LNF, Dafne Light) ; Gallo, A. (LNF, Dafne Light) ; Fox, J.D. (SLAC) ; Cesaratto, J. (SLAC) ; Dusatko, J. (SLAC) ; Olsen, J. (SLAC) ; Rivetta, C. (SLAC) ; Turgut, O. (SLAC) et al.
This paper presents history and evolution of the intra-bunch feedback system for circular accelerators. This pro-ject has been presented by John D. [...]
arXiv:2004.11649.-
Geneva : CERN, 2020 - 5 p.
- Published in : 10.23732/CYRCP-2020-007.223
Fulltext: PDF; Fulltext from publisher: 1117-Article Text-4768-1-10-20200919 (1) - PDF; 1117-Article Text-4768-1-10-20200919 - PDF;
In : ECLOUD’18: Proceedings of the Joint INFN-CERN-ARIES Workshop on Electron-Cloud Effects, La Biodola, Isola d'Elba, Italy, 3 - 7 Jun 2018, pp.223 (CERN-2020-007)
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2.
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Wideband Vertical Intra-Bunch Feedback at the SPS - Technology Development, Recent Accelerator Measurements and Next Steps
/ Fox, John (SLAC) ; Bartosik, Hannes (CERN) ; De Santis, Stefano (LBNL, Berkeley) ; Dusatko, John (SLAC) ; Höfle, Wolfgang (CERN) ; Rivetta, Claudio (SLAC) ; Salvant, Benoit (CERN) ; Turgut, Ozhan (SLAC) ; Wehrle, Urs (CERN)
A wideband vertical intra-bunch feedback system is in development at the CERN SPS for use to control potential Ecloud and TMCI instabilities. The work is motivated by planned intensity increases from the LIU and HL-LHC upgrade programs. [...]
2016 - 7 p.
- Published in : 10.18429/JACoW-IBIC2015-WECLA04
Fulltext: PDF;
In : International Beam Instrumentation Conference , Melbourne, Australia, 13 - 17 Sep 2015, pp.WECLA04
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3.
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Development of a 4 GS/s Intra-bunch Instability Control System for the SPS - Next Steps
/ Fox, John (SLAC) ; Cesaratto, John (SLAC) ; Dusatko, John (SLAC) ; Pollock, Kristin (SLAC) ; Rivetta, Claudio (SLAC) ; Turgut, Ozhan (SLAC) ; De Santis, Stefano (LBNL, Berkeley) ; Höfle, Wolfgang (CERN) ; Kotzian, Gerd (CERN) ; Wehrle, Urs (CERN)
We present the expanded system architecture in development for the control of intra-bunch instabilities in the SPS. Earlier efforts concentrated on validating the performance of a single-bunch demonstration processor. [...]
2014 - 3 p.
- Published in : , pp. TUPRI085
Fulltext: PDF; External link: Published version from JACoW
In : 5th International Particle Accelerator Conference, Dresden, Germany, 15 - 20 Jun 2014, pp.TUPRI085
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4.
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Mathematical Models of Feedback Systems for Control of Intra-Bunch Instabilities Driven by E-Clouds and TMCI
/ Rivetta, C H (SLAC) ; Fox, J D (SLAC) ; Mastoridis, T (SLAC) ; Pivi, M T F (SLAC) ; Turgut, O (SLAC) ; Höfle, W (CERN) ; Secondo, R (LBL, Berkeley) ; Vay, J L (LBL, Berkeley)
The feedback control of intrabunch instabilities driven by E-Clouds or strong head-tail coupling (TMCI) requires sufficient bandwidth to sense the vertical position and drive multiple sections of a nanosecond scale bunch. These requirements impose challenges and limits in the design and implementation of the feedback system. [...]
2011
External link: Published version from JACoW
In : 2011 Particle Accelerator Conference, New York City, NY, USA, 28 Mar - 1 Apr 2011, pp.WEP079
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5.
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Control of Intra-Bunch Vertical Instabilities at the SPS - Measurements and Technology Demonstration
/ Fox, John (SLAC) ; Bartosik, Hannes (CERN) ; De Santis, Stefano (LBNL, Berkeley) ; Dusatko, John (SLAC) ; Höfle, Wolfgang (CERN) ; Li, Kevin (CERN) ; Métral, Elias (CERN) ; Rivetta, Claudio (SLAC) ; Salvant, Benoit (CERN) ; Turgut, Ozhan (SLAC) et al.
We present recent measurements demonstrating control of unstable beam motion in single bunch and bunch train configurations at the SPS. The work is motivated by anticipated intensity increases from the LIU and HL-LHC upgrade programs, and has included the development of a GHz bandwidth reconfigurable 4 GS/S signal processor with wideband kickers and associated amplifiers. [...]
CERN-ACC-2017-200.-
2017 - 3 p.
- Published in : 10.18429/JACoW-IPAC2017-TUPIK119
Fulltext: PDF;
In : 8th International Particle Accelerator Conference, Copenhagen, Denmark, 14 - 19 May 2017, pp.TUPIK119
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6.
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A wideband slotted kicker design for SPS transverse intra-bunch feedback
/ Cesaratto, J M (SLAC) ; Fox, J D (SLAC) ; Rivetta, C H (SLAC) ; Alesini, D (Frascati) ; Gallo, A (Frascati) ; Zobov, M (Frascati) ; De Santis, S (LBNL, Berkeley) ; Hofle, W (CERN)
In order for the SPS to meet the beam intensity demands for the HL-LHC upgrade, control and mitigation of trans- verse beam instabilities caused by electron cloud and TMCI will be essential. For this purpose a wideband intra-bunch feedback method has been proposed, based on a 4 GS/s front end data acquisition and processing, and on a back end frequency response extending to at least 1 GHz. [...]
IPAC-2014-TUPRI087.-
2014 - 3 p.
- Published in : , pp. TUPRI087
External links: JACOW; Published version from JACoW
In : 5th International Particle Accelerator Conference, Dresden, Germany, 15 - 20 Jun 2014, pp.TUPRI087
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7.
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A Wideband Slotted Kicker Design for SPS Transverse Intra-Bunch Feedback
/ Cesaratto, John M (SLAC) ; Alesini, D (Frascati) ; DeSantis, S (LBNL, Berkeley) ; Drago, A (Frascati) ; Fox, J D (SLAC) ; Gallo, A (Frascati) ; Hofle, W (CERN) ; Marcellini, F (Frascati) ; Rivetta, C H (SLAC) ; Zobov, M (Frascati)
Control and mitigation of transverse beam instabilities caused by electron cloud and TMCI will be essential for the SPS to meet the beam intensity demands for the HL-LHC upgrade. A wideband intra-bunch feedback method is in development, based on a 4 GS/s data acquisition and processing, and with a back end frequency structure extending to 1 GHz. [...]
SLAC-PUB-15498.-
2013 - 3 p.
External link: SLAC
In : 4th International Particle Accelerator Conference, Shanghai, China, 12 - 17 May 2013, pp.3073
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8.
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First Results and Analysis of the Performance of a 4 GS/s Intra-Bunch Vertical Feedback System at the SPS
/ Fox, J D (SLAC) ; Bartosik, H (CERN) ; Cesaratto, J M (SLAC) ; Dusatko, J (SLAC) ; Hofle, W (CERN) ; Kotzian, G (CERN) ; Olsen, J (SLAC) ; Pollock, K (SLAC) ; Rivetta, C (SLAC) ; Turgut, O (SLAC) et al.
We present experimental measurements taken from SPS machine development studies with an intra-bunch feedback channel. These studies use a 3.2 GS/s digital signal processing system to implement general-purpose control algorithms on multiple samples across a single SPS bunch. [...]
SLAC-PUB-15500.-
2013 - 3 p.
External link: SLAC
In : 4th International Particle Accelerator Conference, Shanghai, China, 12 - 17 May 2013, pp.3070
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9.
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"CAMSHAFT" Bunch Kicker Design for the ALS Storage Ring
/ Kwiatkowski, Slawomir (LBNL, Berkeley) ; Baptiste, Kenneth Michael (LBNL, Berkeley) ; Barry, Walter (LBNL, Berkeley) ; Julian, James (LBNL, Berkeley) ; Low, Raymond (LBNL, Berkeley) ; Plate, David (LBNL, Berkeley) ; Portmann, Gregory James (LBNL, Berkeley) ; Robin, David (LBNL, Berkeley)
2006 - 3 p.
External link: Published version from JACoW
In : 10th European Particle Accelerator Conference, Edinburgh, UK, 26 - 30 Jun 2006, pp.3547
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10.
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The hardware implementation of the CERN SPS ultrafast feedback processor demonstrator
/ Dusakto, J E (SLAC) ; Cesaratto, J M (SLAC) ; Fox, J D (SLAC) ; Olsen, J (SLAC) ; Rivetta, C H (SLAC) ; Höfle, W (CERN)
An ultrafast 4GSa/s transverse feedback processor has been developed for proof-of-concept studies of feedback control of e-cloud driven and transverse mode coupled intra-bunch instabilities in the CERN SPS. This system consists of a high-speed ADC on the front end and equally fast DAC on the back end. [...]
2013
Published version from JACoW: PDF;
In : 2nd International Beam Instrumentation Conference, Oxford, UK, 16 - 19 Sep 2013, pp.MOPC28
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