CERN Accelerating science

PS Complex

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2018-02-16
06:53
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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2018-01-24
06:17
Yasp for LEIR to PS injection / Kain, V (CERN) ; Axensalva, J (CERN) ; Bartosik, H (CERN) ; Huschauer, A (CERN) ; Jacquet, D (CERN) ; Nicosia, D (CERN) ; Pasinelli, S (CERN) ; Wenninger, J (CERN)
The steering program YASP was introduced in the LEIRinjection as well as the extraction lines in 2016 to correctthe trajectories with well-known model based correctionalgorithms such as MICADO or SVD. In addition a YASPconfiguration was prepared to correct the extraction linetogether with the first turn of the PS. [...]
2017 - 8 p. - Published in : 10.23727/CERN-Proceedings-2017-002.137
In : Injector MD Days 2017, CERN, Geneva, Switzerland, 23 - 24 Mar 2017, pp.137-144

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2018-01-24
06:17
100ms injection into LEIR / Scrivens, R (CERN) ; Biancacci, N (CERN) ; Huschauer, A (CERN) ; Manglunki, D (CERN) ; Tranquille, G (CERN)
Results of machine developments for 100ms spaced injec-tions from Linac3 into LEIR are presented..
2017 - 4 p. - Published in : 10.23727/CERN-Proceedings-2017-002.133
In : Injector MD Days 2017, CERN, Geneva, Switzerland, 23 - 24 Mar 2017, pp.133-136

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2018-01-24
06:17
LEIR impedance model and coherent beam instability observations / Biancacci, N (CERN) ; Métral, E (CERN) ; Migliorati, M (U. Rome La Sapienza (main) ; INFN, Rome) ; Rijoff, T L (CERN)
The LEIR machine is the first synchrotron in the ion ac-celeration chain at CERN and it is responsible to deliverhigh intensity ion beams to the LHC. Following the recentprogress in the understanding of the intensity limitations,detailed studies of the machine impedance started. [...]
2017 - 4 p. - Published in : 10.23727/CERN-Proceedings-2017-002.129
In : Injector MD Days 2017, CERN, Geneva, Switzerland, 23 - 24 Mar 2017, pp.129-132

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2018-01-24
06:17
LEIR longitudinal studies / Albright, S (CERN) ; Angoletta, M E (CERN) ; Hancock, S (CERN)
Towards the end of 2015 and during 2016 there were exten-sive studies of longitudinal beam dynamics in LEIR aimedat improving extracted intensities. As the driving source oflosses early in the ramp was shown to be transverse spacecharge tune spread a significant improvement came fromflattening the beam profile to increase the bunching factorby offsetting the RF frequency from the beam revolution fre-quency [...]
2017 - 6 p. - Published in : 10.23727/CERN-Proceedings-2017-002.123
In : Injector MD Days 2017, CERN, Geneva, Switzerland, 23 - 24 Mar 2017, pp.123-128

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2018-01-24
06:17
Space charge and working point studies in the CERN Low Energy Ion Ring / Huschauer, A (CERN) ; Bartosik, H (CERN) ; Hancock, S (CERN) ; Kain, V (CERN)
The Low Energy Ion Ring (LEIR) is at the heart ofCERN’s heavy ion physics programme and was designed toprovide the high phase space densities required by the exper-iments at the Large Hadron Collider (LHC). LEIR is the firstsynchrotron of the LHC ion injector chain and it receives aquasi-continuous pulse of lead ions (Pb54+) from Linac3, ex-ploiting a sophisticated multi-turn injection scheme in bothtransverse and longitudinal planes. [...]
2017 - 6 p. - Published in : 10.23727/CERN-Proceedings-2017-002.117
In : Injector MD Days 2017, CERN, Geneva, Switzerland, 23 - 24 Mar 2017, pp.117-122

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2018-01-24
06:17
Source and LINAC3 studies / Bellodi, G (CERN)
In the framework of the LHC Ion Injector Upgrade pro-gramme (LIU), several activities have been carried out in2016 to improve the ion source and Linac3 performance,with the goal to increase the beam current routinely deliv-ered to LEIR. The extraction region of the GTS-LHC ionsource was upgraded with enlarged vacuum chamber aper-tures and the addition of an einzel lens, yielding highertransmission through the rest of the machine. [...]
2017 - 4 p. - Published in : 10.23727/CERN-Proceedings-2017-002.113
In : Injector MD Days 2017, CERN, Geneva, Switzerland, 23 - 24 Mar 2017, pp.113-116

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2018-01-24
06:17
Longitudinal coupled-bunch instability studies in the PS / Damerau, H (CERN) ; Ventura, L (CERN)
The main longitudinal limitation for LHC-type beams inthe PS are coupled-bunch instabilities. A dedicated proto-typefeedbacksystemusingaFinemetcavityasalongitudinalkicker has been installed [...]
2017 - 4 p. - Published in : 10.23727/CERN-Proceedings-2017-002.59
In : Injector MD Days 2017, CERN, Geneva, Switzerland, 23 - 24 Mar 2017, pp.59-62

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2018-01-24
06:17
Injection septa position and angle optimisation in view of the 2 GeV liu upgrade of the CERN PS / Serluca, HM (CERN) ; Bartmann, W (CERN) ; Forte, V (CERN) ; Fraser, M (CERN) ; Sterbini, G (CERN)
In the framework of the LHC Injector Upgrade (LIU)project the CERN PS injection kinetic energy will be up-graded from 1.4 to 2 GeV. The injection equipment, whichis already operating close to its limit, is being redesigned tocope with 30% increase in the beam rigidity [...]
2017 - 8 p. - Published in : 10.23727/CERN-Proceedings-2017-002.51
In : Injector MD Days 2017, CERN, Geneva, Switzerland, 23 - 24 Mar 2017, pp.51-58

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2018-01-24
06:17
The (7,7) optics at CERN PS / Serluca, M (CERN) ; Aumon, S (CERN) ; Efthymiopoulos, I (CERN) ; Sperati, F (CERN) ; Sterbini, G (CERN) ; Tecker, F (CERN) ; Zisopoulos, P (CERN)
The PS lattice is composed by one hundred combinedfunction magnets, which set the bare tune of the machineto (Qh,Qv) = (6.25, 6.28). Low energy quadrupoles areused at injection to move the tune in a limited working pointarea [...]
2017 - 8 p. - Published in : 10.23727/CERN-Proceedings-2017-002.43
In : Injector MD Days 2017, CERN, Geneva, Switzerland, 23 - 24 Mar 2017, pp.43-50

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