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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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2.
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A 4 GS/sec Instability Feedback Processing System for Intra-bunch Instabilities
/ Dusatko, J (SLAC) ; Cesaratto, J M (SLAC) ; Fox, J D (SLAC) ; Pollock, K (SLAC) ; Rivetta, C H (SLAC) ; Turgut, O (SLAC) ; Hofle, W (CERN)
We present the architecture and implementation overview of a proof-of-principle digital signal processing system developed to study control of Electron-Cloud and Transverse Mode Coupling Instabilities (TMCI) in the CERN SPS. This system is motivated by intensity increases planned as part of the High Luminosity LHC upgrade. [...]
SLAC-PUB-15830; IPAC-2013-WEPME059.-
2013 - 3 p.
- Published in : (2013) , pp. WEPME059
Fulltext: PDF; External link: Published version from JACoW
In : 4th International Particle Accelerator Conference, Shanghai, China, 12 - 17 May 2013, pp.3067
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3.
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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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4.
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A 4 GS/s feedback processing system for control of intra-bunch instabilities
/ Fox, J D (SLAC) ; Cesaratto, J M (SLAC) ; Dusatko, J (SLAC) ; Olsen, J (SLAC) ; Pollock, K (SLAC) ; Rivetta, C (SLAC) ; Turgut, O (SLAC) ; Hofle, W (CERN)
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. [...]
2013
Published version from JACoW: PDF;
In : 2nd International Beam Instrumentation Conference, Oxford, UK, 16 - 19 Sep 2013, pp.TUBL2
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5.
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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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6.
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Control of intrabunch dynamics at CERN SPS ring using 3.2 GS/s digital feedback channel
/ Rivetta, C (SLAC) ; Fox, J D (SLAC) ; Cesaratto, J M (SLAC) ; Dusatko, J (SLAC) ; Pivi, M (SLAC) ; Pollock, K (SLAC) ; Turgut, O (SLAC) ; Bartosik, H (CERN) ; Hofle, W (CERN) ; Kotzian, G (CERN) et al.
The feedback control of intra-bunch instabilities driven by electron-cloud or strong head-tail interaction requires bandwidth sufficient to sense the vertical position and apply correction fields to multiple sections of a nanosecondscale bunch. These requirements impose challenges and limits in the design of the feedback channel. [...]
2013
Published version from JACoW: PDF;
In : North American Particle Accelerator Conference, Pasadena, CA, USA, 29 Sep - 04 Oct 2013, pp.1430-1433
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7.
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The SPS Wideband Feedback Processor: A Flexible FPGA-Based Digital Signal Processing Demonstration Platform for Intra-Bunch Beam Stability Studies
/ Dusatko, John (SLAC) ; Bjørsvik, Endre (CERN) ; Fox, John (SLAC) ; Höfle, Wolfgang (CERN) ; Rivetta, Claudio (SLAC) ; Turgut, Ozhan (Stanford U.)
A flexible digital signal processing platform based on FPGA technology has been developed for vertical intra-bunch beam stability studies at the CERN SPS. This system is unique in that samples at a very high rate (4GSa/s) in order to measure and control motion within the 1.7ns proton beam bunch. [...]
2018 - 5 p.
- Published in : 10.18429/JACoW-IBIC2017-WE1AB1
Fulltext: PDF;
In : 6th International Beam Instrumentation Conference, Grand Rapids, MI, USA, 20 -24 Aug 2017, pp.WE1AB1
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8.
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Feedback System Design Techniques for Control of Intra-bunch Instabilities at the SPS
/ Rivetta, Claudio (SLAC) ; Cesaratto, John (SLAC) ; Dusatko, John (SLAC) ; Fox, John (SLAC) ; Turgut, Ozhan (SLAC) ; Höfle, Wolfgang (CERN) ; Kotzian, Gerd (CERN) ; Li, Kevin (CERN)
The feedback control of intra-bunch instabilities driven by electron-clouds or strong head-tail coupling requires bandwidth sufficient to sense the vertical position and apply multiple corrections within a nanosecond-scale bunch. These requirements impose challenges and limits in the design and implementation of the feedback system. [...]
2014 - 3 p.
- Published in : , pp. TUPRI086
Fulltext: PDF; External link: Published version from JACoW
In : 5th International Particle Accelerator Conference, Dresden, Germany, 15 - 20 Jun 2014, pp.TUPRI086
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9.
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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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10.
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Instabilities simulations with wideband feedback systems: CMAD, HEADTAIL, WARP
/ Li, Kevin (SLAC) ; Cesaratto, J (SLAC) ; Fox, J D (SLAC) ; Pivi, M (SLAC) ; Rivetta, C (SLAC) ; Rumolo, G (CERN)
Transverse mode coupling (TMCI) and electron cloud instabilities (ECI) pose fundamental limitations on the acceptable beam intensities in the SPS at CERN. This in turn limits the ultimate achievable luminosity in the LHC. [...]
Geneva : CERN, 2013 - 8 p.
Fulltext: PDF; Published version from CERN: PDF;
In : ECLOUD’12: Joint INFN-CERN-EuCARD-AccNet Workshop on Electron-Cloud Effects, pp.203-210
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