CERN Accelerating science

All PS Complex

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2019-10-19
06:02
Study of the transverse emittance blow-up along the Proton Synchrotron Booster cycle during wire scanner operation / Santamaría García, Andrea (CERN) ; Antoniou, Fanouria (CERN) ; Bartosik, Hannes (CERN) ; Briz Monago, Jose (CERN) ; Di Giovanni, Gian Piero (CERN) ; Guerrero Ollacarizqueta, Ana (CERN) ; Hunt, James (CERN) ; Mikulec, Bettina (CERN) ; Roncarolo, Federico (CERN) ; Senes, Eugenio (CERN) et al.
Transverse emittance measurements with wire scanners have been extensively studied across the accelerator complex at CERN due to their important role in characterizing the beams and their complicated modelling. In recent years, this topic has been of particular interest for the LHC Injectors Upgrade (LIU) project, where a tight transverse emittance blow-up budget between the Proton Synchrotron Booster (PSB) and the Proton Synchrotron (PS) is imposed to ensure the required beam brightness for the High Luminosity LHC (HL-LHC). [...]
2019 - 4 p. - Published in : 10.18429/JACoW-IPAC2019-MOPTS101 Fulltext from publisher: PDF;
In : 10th International Particle Accelerator Conference, Melbourne, Australia, 19 - 24 May 2019, pp.MOPTS101

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2019-10-19
06:02
Transverse emittance measurement in the CERN Proton Synchrotron in view of beam production for the High-Luminosity LHC / Senes, Eugenio (CERN ; JAI, UK ; U. Oxford (main)) ; Emery, Jonathan (CERN) ; Forte, Vincenzo (CERN) ; Fraser, Matthew (CERN) ; Guerrero Ollacarizqueta, Ana (CERN) ; Huschauer, Alexander (CERN) ; Roncarolo, Federico (CERN) ; Sirvent, Jose (CERN ; Barcelona U.) ; Skowroński, Piotr (CERN) ; Tecker, Frank (CERN)
In the framework of the LHC Injectors Upgrade project the improvements required to achieve the parameters of the future beams for the High-Luminosity LHC are being studied and implemented. In order to deliver high brightness beams, control over the beam intensity and emittance is fundamental. [...]
2019 - 4 p. - Published in : 10.18429/JACoW-IPAC2019-MOPTS100 Preprint: PDF;
In : 10th International Particle Accelerator Conference, Melbourne, Australia, 19 - 24 May 2019, pp.MOPTS100

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2019-10-19
06:01
Beam manipulations with barrier buckets in the CERN PS / Vadai, Mihaly (Queen Mary, U. of London (main) ; CERN) ; Alomainy, Akram (Queen Mary, U. of London (main)) ; Damerau, Heiko (CERN) ; Gilardoni, Simone (CERN) ; Giovannozzi, Massimo (CERN) ; Huschauer, Alexander (CERN)
A barrier bucket scheme is being considered to reduce losses during the Multi-Turn Extraction from the CERN Proton Synchrotron to the Super Proton Synchrotron for the fixed-target physics programme. For effective loss reduction, the extraction kicker has to be triggered during the gap at the time of the longitudinal barrier. [...]
2019 - 4 p. - Published in : 10.18429/JACoW-IPAC2019-MOPTS107 Preprint: PDF;
In : 10th International Particle Accelerator Conference, Melbourne, Australia, 19 - 24 May 2019, pp.MOPTS107

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2019-10-19
06:01
Barrier bucket studies in the CERN PS / Vadai, Mihaly (Queen Mary, U. of London (main) ; CERN) ; Alomainy, Akram (Queen Mary, U. of London (main)) ; Damerau, Heiko (CERN)
Part of the residual beam loss during the Multi-Turn Extraction (MTE) of fixed target beams from the CERN Proton Synchrotron (PS) can be attributed to kicker magnets switching while the beam is coasting with the main radio frequency (RF) systems off before extraction. Generating a barrier bucket to deplete the longitudinal line density of the coasting beam during the kicker rise time can reduce these losses. [...]
2019 - 4 p. - Published in : 10.18429/JACoW-IPAC2019-MOPTS106 Fulltext from publisher: PDF;
In : 10th International Particle Accelerator Conference, Melbourne, Australia, 19 - 24 May 2019, pp.MOPTS106

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2019-10-19
06:01
Linear and non-linear optics measurements in PS using turn-by-turn BPM data / Skowroński, Piotr (CERN) ; Giovannozzi, Massimo (CERN) ; Huschauer, Alexander (CERN)
For the first time, the optics of the CERN Proton Synchrotron (PS) was measured using turn-by-turn BPM data of forced betatron oscillations excited with an AC dipole. We report results of phase advance and beta-beating measurements. [...]
2019 - 4 p. - Published in : 10.18429/JACoW-IPAC2019-MOPTS102 Fulltext from publisher: PDF;
In : 10th International Particle Accelerator Conference, Melbourne, Australia, 19 - 24 May 2019, pp.MOPTS102

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2019-10-19
06:01
Linac4: Reliability run results and source extraction studies / Noll, Daniel (CERN) ; Bellodi, Giulia (CERN) ; Bertolo, Sebastien (CERN) ; Di Lorenzo, Francesco (CERN) ; Lallement, Jean-Baptiste (CERN) ; Lettry, Jacques (CERN) ; Lombardi, Alessandra (CERN) ; Mastrostefano, Cristiano (CERN) ; Mikulec, Bettina (CERN) ; O'Neil, Michael (CERN) et al.
Linac4, a 160 MeV, 352.2 MHz linear accelerator, has been fully commissioned and will take its place as injector to the CERN chain of accelerators during the long shutdown (LS2) in 2019-2020. In the past year, it has been providing beam during a test run to assess its reliability in view of the connection to the LHC proton injector chain. [...]
2019 - 4 p. - Published in : 10.18429/JACoW-IPAC2019-MOPTS096 Fulltext from publisher: PDF;
In : 10th International Particle Accelerator Conference, Melbourne, Australia, 19 - 24 May 2019, pp.MOPTS096

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2019-10-18
06:27
Emittance dilution from the CERN Proton Synchrotron Booster’s extraction kickers / Fraser, Matthew (CERN) ; Albright, Simon (CERN) ; Antoniou, Fanouria (CERN) ; Di Giovanni, Gian Piero (CERN) ; Dutheil, Yann (CERN) ; Forte, Vincenzo (CERN) ; Huschauer, Alexander (CERN) ; Roncarolo, Federico (CERN)
Understanding the different sources of emittance dilution along the LHC injector chain is an important part of providing the high brightness proton beams demanded by the LHC Injectors Upgrade (LIU) project. In this context, the first beam-based measurements of the magnetic waveforms of the Proton Synchrotron Booster’s (PSB) extraction kickers were carried out and used to quantify the transverse emittance blow-up during extraction and transfer to the Proton Synchrotron (PS). [...]
2019 - 4 p. - Published in : 10.18429/JACoW-IPAC2019-WEPMP026 Fulltext from publisher: PDF;
In : 10th International Particle Accelerator Conference, Melbourne, Australia, 19 - 24 May 2019, pp.WEPMP026

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2019-10-18
06:27
Matching studies between CERN PSB and PS through multi-turn beam profile acquisitions / Fraser, Matthew (CERN) ; Dutheil, Yann (CERN) ; Forte, Vincenzo (CERN) ; Guerrero, Ana (CERN) ; Huschauer, Alexander (CERN) ; Oeftiger, Adrian (CERN) ; Ogur, Salim (CERN) ; Roncarolo, Federico (CERN) ; Senes, Eugenio (CERN) ; Tecker, Frank (CERN)
In the framework of the LHC Injectors Upgrade (LIU) project, the investigation and quantification of the optics mismatch between the CERN Proton Synchrotron Booster (PSB) and PS is a crucial step in understanding the source of horizontal emittance growth between the two machines. Extensive studies were carried out to estimate the mismatch from single-pass measurements in the transfer line and to rematch the transfer line to reduce the dispersive mismatch at PS injection while keeping the betatron matching unaltered. [...]
2019 - 4 p. - Published in : 10.18429/JACoW-IPAC2019-WEPMP025 Fulltext from publisher: PDF;
In : 10th International Particle Accelerator Conference, Melbourne, Australia, 19 - 24 May 2019, pp.WEPMP025

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2019-10-18
06:27
Frequency modulated capture of cooled coasting ion beams / Albright, Simon (CERN) ; Angoletta, Maria Elena (CERN)
Transverse space charge effects in the Low Energy Ion Ring (LEIR) at CERN have been shown to be a major source of particle losses, which can be mitigated with a larger RMS longitudinal emittance. However, due to electron cooling during the injection plateau, the longitudinal density is very high prior to RF capture. [...]
2019 - 3 p. - Published in : 10.18429/JACoW-IPAC2019-WEPMP021 Preprint: PDF;
In : 10th International Particle Accelerator Conference, Melbourne, Australia, 19 - 24 May 2019, pp.WEPMP021

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2019-10-17
06:46
The new injection region of the CERN PS Booster / Weterings, Wim (CERN) ; Bracco, Chiara (CERN) ; Jorat, Louise Olivia (CERN) ; Meddahi, Malika (CERN) ; Noulibos, Remy (CERN) ; Van Trappen, Pieter (CERN)
During the Long Shutdown 2 (LS2) at CERN, the new Linac4 (L4) accelerator will be connected to the PS Booster (PSB) to inject 160 MeV H$^−$ beam into the 4 superposed PSB rings. In order to achieve this, we have designed, built and pre-assembled a completely new H$^−$ charge-exchange injection chicane system, with a carbon stripping foil unit to convert the negative hydrogen ions into protons by stripping off the electrons. [...]
2019 - 4 p. - Published in : 10.18429/JACoW-IPAC2019-WEPMP039 Fulltext from publisher: PDF;
In : 10th International Particle Accelerator Conference, Melbourne, Australia, 19 - 24 May 2019, pp.WEPMP039

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