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Space charge driven beam loss for cooled beams and mitigation measures in the CERN Low Energy Ion Ring
/ Bartosik, Hannes (CERN) ; Hancock, Steven (CERN) ; Huschauer, Alexander (CERN) ; Kain, Verena (CERN)
The performance of the CERN Low Energy Ion Ring (LEIR) with electron cooled lead ion beams is presently limited by losses, which occur during RF capture and the first part of acceleration. Extensive experimental studies performed in 2015 indicate that the losses are caused by the interplay of betatron resonances and the direct space charge detuning, which is significantly enhanced during bunching. [...]
2016 - 6 p.
- Published in : 10.18429/JACoW-HB2016-TUAM5X01
Fulltext: PDF;
In : 57th ICFA Advanced Beam Dynamics Workshop on High-Intensity and High-Brightness Hadron Beams, Malmö, Sweden, 3 - 8 Jul 2016, pp.TUAM5X01
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Performance of the CERN Injector Complex and Transmission Studies into the LHC during the Second Proton-Lead Run
/ Alemany-Fernández, Reyes (CERN) ; Albright, Simon (CERN) ; Angoletta, Maria Elena (CERN) ; Axensalva, Jerome (CERN) ; Bartmann, Wolfgang (CERN) ; Bartosik, Hannes (CERN) ; Baudrenghien, Philippe (CERN) ; Bellodi, Giulia (CERN) ; Blas, Alfred (CERN) ; Bohl, Thomas (CERN) et al.
The LHC performance during the proton-lead run in 2016 fully relied on a permanent monitoring and systematic improvement of the beam quality in all the injectors. The beam production and characteristics are explained in this paper, together with the improvements realized during the run from the source up to the flat top of the LHC [...]
CERN-ACC-2017-155.-
2017 - 4 p.
- Published in : 10.18429/JACoW-IPAC2017-TUPVA128
Fulltext: PDF;
In : 8th International Particle Accelerator Conference, Copenhagen, Denmark, 14 - 19 May 2017, pp.TUPVA128
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Machine Development Studies in the CERN PS Booster, in 2016
/ Benedetto, Elena (CERN) ; Albright, Simon (CERN) ; Angoletta, Maria Elena (CERN) ; Bartmann, Wolfgang (CERN) ; Belleman, Jeroen (CERN) ; Blas, Alfred (CERN) ; Cieslak-Kowalska, Magdalena (Ecole Polytechnique, Lausanne ; CERN) ; Di Giovanni, Gian Piero (CERN) ; Findlay, Alan (CERN) ; Forte, Vincenzo (CERN) et al.
The paper presents the outstanding studies performed in 2016 in preparation of the PS Booster upgrade, within the LHC Injector Upgrade project (LIU), to provide twice higher brightness and intensity to the High-Luminosity LHC. Major changes include the increase of injection and extraction energy, the implementation of a H⁻ charge-exchange injection system, the replacement of the present Main Power Supply and the deployment of a new RF system (and related Low-Level), based on the Finemet technology. [...]
CERN-ACC-2017-163.-
2017 - 4 p.
- Published in : 10.18429/JACoW-IPAC2017-WEPVA037
Fulltext: PDF;
In : 8th International Particle Accelerator Conference, Copenhagen, Denmark, 14 - 19 May 2017, pp.WEPVA037
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The LHC Injectors Upgrade (LIU) Project at CERN: Ion Injector Chain
/ Bartosik, Hannes (CERN) ; Albright, Simon (CERN) ; Angoletta, Maria Elena (CERN) ; Bellodi, Giulia (CERN) ; Biancacci, Nicolo (CERN) ; Bohl, Thomas (CERN) ; Coupard, Julie (CERN) ; Damerau, Heiko (CERN) ; Funken, Anne (CERN) ; Goddard, Brennan (CERN) et al.
The LHC injector chain for Pb-ion beams at CERN consists of Linac3, the accumulator ring LEIR, the PS and the SPS. In the context of the LHC injectors upgrade (LIU) project an intense program of machine development studies has been performed in the last two years to maximise the intensity of Pb-ion beams at LHC injection. [...]
CERN-ACC-2017-206.-
2017 - 4 p.
- Published in : 10.18429/JACoW-IPAC2017-TUPVA020
Fulltext: PDF;
In : 8th International Particle Accelerator Conference, Copenhagen, Denmark, 14 - 19 May 2017, pp.TUPVA020
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The New LEIR Digital Low-Level RF System
/ Angoletta, Maria Elena (CERN) ; Albright, Simon (CERN) ; Findlay, Alan (CERN) ; Haase, Matthias (CERN) ; Hancock, Steven (CERN) ; Jaussi, Michael (CERN) ; Molendijk, John (CERN) ; Paoluzzi, Mauro (CERN) ; Sanchez-Quesada, Jorge (CERN)
CERN's Low Energy Ion Ring (LEIR) low-level RF (LLRF) system has been successfully upgraded in 2016 to the new digital, LLRF family for frequency-sweeping synchrotrons developed at CERN. For LEIR it implements not only beam loops but also the voltage and phase loops required for the control of two Finemet-based High-Level RF (HLRF) systems. [...]
CERN-ACC-2017-236.-
2017 - 4 p.
- Published in : 10.18429/JACoW-IPAC2017-THPAB144
Fulltext: PDF;
In : 8th International Particle Accelerator Conference, Copenhagen, Denmark, 14 - 19 May 2017, pp.THPAB144
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Operational Experience With the New Digital Low-Level RF System for CERN's PS Booster
/ Angoletta, Maria Elena (CERN) ; Albright, Simon (CERN) ; Findlay, Alan (CERN) ; Hancock, Steven (CERN) ; Jaussi, Michael (CERN) ; Molendijk, John (CERN) ; Sanchez-Quesada, Jorge (CERN)
The four rings of CERN's PS Booster have been equipped in 2014 with a new digital low-level RF (LLRF) system based upon a new, in-house developed LLRF family. This is a second-generation LLRF family that has been since then deployed on other synchrotrons. [...]
CERN-ACC-2017-237.-
2017 - 4 p.
- Published in : 10.18429/JACoW-IPAC2017-THPAB143
Fulltext: PDF;
In : 8th International Particle Accelerator Conference, Copenhagen, Denmark, 14 - 19 May 2017, pp.THPAB143
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