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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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Control of Intra-Bunch Vertical Motion in the SPS with GHz Bandwidth Feedback
/ Fox, John (SLAC) ; Bartosik, Hannes (CERN) ; Bjørsvik, Endre (CERN) ; De Santis, Stefano (LBNL, Berkeley) ; Dusatko, John (SLAC) ; Höfle, Wolfgang (CERN) ; Kotzian, Gerd (CERN) ; Li, Kevin (CERN) ; Métral, Elias (CERN) ; Rivetta, Claudio (SLAC) et al.
A GHz bandwidth vertical beam feedback system has been in development at the CERN SPS for control of unstable vertical beam motion in single bunch and bunch train configurations. We present measurements and recent studies of stable and unstable motion for intensities up to 2 × 1011 p/bunch[1]. [...]
CERN-ACC-2018-170.-
2018 - 6 p.
- Published in : (2018) , pp. WEPAL079
- Published in : J. Phys.: Conf. Ser. 1067 (2018) 072024
Fulltext: PDF;
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.WEPAL079
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3.
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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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4.
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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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5.
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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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6.
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Experimental Measurements of e-Cloud Mitigation Using Clearing Electrodes in the DAФNE Collider
/ Alesini, D (Frascati) ; Drago, A (Frascati) ; Gallo, A (Frascati) ; Guiducci, S (Frascati) ; Milardi, C (Frascati) ; Zobov, M (Frascati) ; De Santis, S (LBNL, Berkeley) ; Demma, Theo (Orsay, LAL) ; Raimondi, P (ESRF, Grenoble)
/DAФNE Collaboration
Recently the DAФNE electron-positron collider has started delivering luminosity to the KLOE-2 experiment. For this run special metallic electrodes were installed in all the dipole and wiggler magnets of the positron ring to cope with the effects induced by the e-cloud formation. [...]
CERN-ACC-2015-0162.-
Geneva : CERN, 2012 - 3 p.
Fulltext: PDF;
In : 3rd International Particle Accelerator Conference, New Orleans, LA, USA, 20 - 25 May 2012, pp.1107-1109
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7.
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DAФNE Operation with Electron-Cloud-Clearing Electrodes
/ Alesini, D (Frascati) ; Drago, A (Frascati) ; Gallo, A (Frascati) ; Guiducci, S (Frascati) ; Milardi, C (Frascati) ; Stella, A (Frascati) ; Zobov, Mikhail (Frascati) ; De Santis, S (LBNL, Berkeley) ; Demma, Theo (Orsay, LAL) ; Raimondi, P (ESRF, Grenoble)
The effects of an electron cloud (e-cloud) on beam dynamics are one of the major factors limiting performances of high intensity positron, proton, and ion storage rings. In the electron-positron collider DAΦNE, namely, a horizontal beam instability due to the electron-cloud effect has been identified as one of the main limitations on the maximum stored positron beam current and as a source of beam quality deterioration. [...]
CERN-ACC-2015-0148.-
Geneva : CERN, 2013 - 6 p.
- Published in : Phys. Rev. Lett. 110 (2013) 124801
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8.
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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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9.
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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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10.
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SPS Wideband Transverse Feedback Kicker: Design Report
/ Cesaratto, J M ; Fox, J D ; Rivetta, C H ; Alesini, D ; Drago, A ; Gallo, A ; Marcellini, F ; Zobov, M ; De Santis, S ; Paret, Z et al.
The SPS wideband transverse feedback system is being developed to control vertical beam instabilities arising from intensity dependent effects like electron cloud instability (ECI) and the transverse mode coupling instability (TMCI). [...]
CERN-ACC-NOTE-2013-0047.
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2013. - 20 p.
SPS_Wideband_Transverse_Feedback-CERN-ACC-NOTE-2013-0047-20131220
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