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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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Recent Upgrades to the CERN SPS Wideband Intra-bunch Transverse Feedback Processor
/ Dusatko, John (SLAC) ; Fox, John (SLAC) ; Höfle, Wolfgang (CERN) ; Rivetta, Claudio (SLAC) ; Turgut, Ozhan (Stanford U., Phys. Dept. ; SLAC)
In support of the CERN High Luminosity LHC (HL-LHC) upgrade program, a research and development effort has been underway to understand and develop feedback control techniques for mitigating transverse intra-bunch instabilities in the SPS driven by electron cloud and TMCI effects. These effects could be a limiting factor to overall machine performance. [...]
CERN-ACC-2016-200; CERN-ACC-2016-201.-
2016 - 3 p.
- Published in : 10.18429/JACoW-IPAC2016-WEPOR010
Published version from JACoW: PDF;
In : 7th International Particle Accelerator Conference, Busan, Korea, 8 - 13 May 2016, pp.WEPOR010
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Upgrade and Operation of the Demonstration 4 GS/Sec. Intra-Bunch Instability Control System for the SPS
/ Dusatko, John (SLAC) ; Fox, John (SLAC) ; Höfle, Wolfgang (CERN) ; Rivetta, Claudio (SLAC) ; Turgut, Ozhan (SLAC)
We present the expanded system implementation and operational experience details for the “Demo” technology platform commissioned at the SPS in January 2015. The system has been expanded during the LS1 shutdown with added features. [...]
CERN-ACC-2015-300.-
2015 - 3 p.
- Published in : (2015) , pp. MOPWI037
Published version from JACoW: PDF; External link: JACOW
In : 6th International Particle Accelerator Conference, Richmond, VA, USA, 3 - 8 May 2015, pp.MOPWI037
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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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Identification of Intra-Bunch Transverse Dynamics for Model Based Wideband Feedback Control at CERN Super Proton Synchrotron
/ Turgut, Ozhan (SLAC) ; Dusatko, John (SLAC) ; Fox, John (SLAC) ; Höfle, Wolfgang (CERN) ; Rivetta, Claudio (SLAC)
Multi-input multi-output (MIMO) feedback design techniques can be helpful to stabilize intra-bunch transverse instabilities induced by electron-clouds or transverse mode couplings at the CERN Super Proton Synchrotron (SPS). These MIMO techniques require a reduced order model of intra-bunch dynamics. [...]
CERN-ACC-2015-299.-
2015 - 4 p.
- Published in : (2015) , pp. MOPWI041
Published version from JACoW: PDF; External link: JACOW
In : 6th International Particle Accelerator Conference, Richmond, VA, USA, 3 - 8 May 2015, pp.MOPWI041
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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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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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Identification of Intra-bunch Transverse Dynamics for Feedback Control Purposes at CERN Super Proton Synchrotron
/ Turgut, Ozhan (SLAC) ; Fox, John (SLAC) ; Rivetta, Claudio (SLAC) ; Höfle, Wolfgang (CERN) ; Rock, Stephen (Stanford U., HEPL)
We present methods for parameter estimation of intra-bunch transverse beam dynamics. The dynamics is represented via reduced order linear models. [...]
2015 - 5 p.
- Published in : (2015) , pp. MOPAB24
Fulltext: PDF; External link: JACOW
In : 54th ICFA Advanced Beam Dynamics Workshop on High-Intensity, High Brightness and High Power Hadron Beams, East-Lansing, USA, 10 - 14 Nov 2014, pp.MOPAB24
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Wideband Vertical Intra-Bunch Feedback At The SPS - 2015 Results And Path Forward
/ Rivetta, Claudio (SLAC) ; De Santis, Stefano (LBL, Berkeley) ; Dusatko, John (SLAC) ; Fox, John (SLAC) ; Höfle, Wolfgang (CERN) ; Turgut, Ozhan (SLAC) ; Wehrle, U (CERN)
We present experimental measurements taken from CERN SPS machine development studies with a wideband intra-bunch feedback channel prototype. The demonstration system is a digital processing system with recently installed wideband kicker and amplifier components. [...]
CERN-ACC-2015-296.-
2015 - 3 p.
- Published in : (2015) , pp. TUAC2
Published version from JACoW: PDF; External link: JACOW
In : 6th International Particle Accelerator Conference, Richmond, VA, USA, 3 - 8 May 2015, pp.TUAC2
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