1.
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Modeling and Feedback Design Techniques for Controlling Intra-Bunch Instabilities at CERN SPS Ring
/ Rivetta, C (SLAC) ; Fox, J (SLAC) ; Turgut, O (SLAC) ; Hofle, W (CERN) ; Li, K S B (CERN)
The feedback control of intra-bunch instabilities driven by electron-clouds or strong head-tail coupling (transverse mode coupled instabilities MCI) 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. [...]
HB2014-THO3AB04.-
2015 - 5 p.
- Published in : (2015) , pp. 399-403
Fulltext: PDF; External links: Fulltext; 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.399-403
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2.
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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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3.
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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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4.
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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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5.
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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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6.
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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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7.
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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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8.
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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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9.
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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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10.
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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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