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 |
A modular optical firing interface for CERN’s generic power converter control platform
/ Di Cosmo, Matteo (CERN) ; Gaime, Thomas (CERN) ; Todd, Benjamin (CERN)
The power converters group at CERN has developed a third generic converter controller (FGC3) and regulation platform (RegFGC3), capable of controlling any of CERN's power converters. This platform provides electrical connections to the low-level control elements of power converters, and in some cases a galvanic isolation is required between the converter controller output, and the power converter under control. [...]
2019 - 4 p.
- Published in : 10.18429/JACoW-IPAC2019-TUPMP034
Fulltext from publisher: PDF;
In : 10th International Particle Accelerator Conference, Melbourne, Australia, 19 - 24 May 2019, pp.TUPMP034
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2019-10-19
06:01 |
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2019-10-19
06:01 |
Updates on alternative pre-booster ring design and wiggler magnet considerations of SPS for the FCC $e^{+}e^{-}$ injector
/ Etisken, Ozgur (Ankara U. ; CERN) ; Antoniou, Fanouria (CERN) ; Çiftçi, Abbas (Izmir U. Economics, Izmir) ; Papaphilippou, Yannis (CERN) ; Tydecks, Tobias (CERN)
The Future Circular $e^{+}e^{−}$ Collider (FCC-$e^{+}e^{−}$) injector complex needs to produce and to transport a high-intensity $e^{+}e^{−}$ beam at a fast repetition rate for topping up the collider at its collision energy. Two different options are under consideration as pre-accelerator before the bunches are transferred to the high-energy booster: using the existing SPS and designing a completely new ring. [...]
2019 - 4 p.
- Published in : 10.18429/JACoW-IPAC2019-MOPTS097
Fulltext from publisher: PDF;
In : 10th International Particle Accelerator Conference, Melbourne, Australia, 19 - 24 May 2019, pp.MOPTS097
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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 |
Building the impedance model of a real machine
/ Salvant, Benoit (CERN) ; Amorim, David (CERN ; Grenoble, INP) ; Antipov, Sergey (CERN) ; Arsenyev, Sergey (CERN) ; Beck, Mario (CERN) ; Biancacci, Nicolo (CERN) ; Brüning, Oliver (CERN) ; Campelo, Jose Enrique (CERN) ; Carideo, Emanuela (CERN) ; Caspers, Fritz (CERN) et al.
A reliable impedance model of a particle accelerator can be built by combining the beam coupling impedances of all the components. This is a necessary step to be able to evaluate the machine performance limitations, identify the main contributors in case an impedance reduction is required, and study the interaction with other mechanisms such as optics nonlinearities, transverse damper, noise, space charge, electron cloud, beam-beam (in a collider). [...]
2019 - 6 p.
- Published in : 10.18429/JACoW-IPAC2019-WEYPLS1
Fulltext from publisher: PDF;
In : 10th International Particle Accelerator Conference, Melbourne, Australia, 19 - 24 May 2019, pp.WEYPLS1
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2019-10-18
06:27 |
Singularities of particle trajectory caustics and beam shaping in bunch compressors
/ Charles, T K (CERN ; Melbourne U.) ; Paganin, D M (Monash U.) ; Boland, M J (Saskatchewan U.) ; Dowd, R T (Australia, CSIRO, Clayton)
Caustics are a common occurrence in optics, describing the bright lines seen in a well-lit coffee cup or the dancing networks of light seen at the bottom of a swimming pool on a sunny day. Recently, caustic formation in electron trajectories was identified as the mechanism driving strong current modulations in accelerated charged-particle beams. [...]
2019 - 12 p.
- Published in : 10.1142/9789813279612_0008
Fulltext from publisher: PDF;
In : Nonlinear Dynamics and Collective Effects in Particle Beam Physics, Arcidosso, Italy, 19 - 22 Sep 2017, pp.103-114
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2019-10-17
06:46 |
The 2018 heavy-ion run of the LHC
/ Jowett, John (CERN) ; Bahamonde Castro, Cristina (CERN) ; Bartmann, Wolfgang (CERN) ; Bracco, Chiara (CERN) ; Bruce, Roderik (CERN) ; Coello, Jaime (CERN) ; Dilly, Joschua (CERN) ; Fartoukh, Stephane (CERN) ; Fol, Elena (CERN) ; Fuster-Martínez, Nuria (CERN) et al.
The fourth one-month Pb-Pb collision run brought LHC Run 2 to an end in December 2018. Following the tendency to reduce dependence on the configuration of the preceding proton run, a completely new optics cycle with the strongest ever focussing at the ALICE and LHCb experiments was designed and rapidly implemented, demonstrating the maturity of the collider’s operating modes. [...]
2019 - 4 p.
- Published in : 10.18429/JACoW-IPAC2019-WEYYPLM2
Fulltext from publisher: PDF;
In : 10th International Particle Accelerator Conference, Melbourne, Australia, 19 - 24 May 2019, pp.WEYYPLM2
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2019-10-17
06:46 |
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2019-10-16
07:36 |
LHC optics measurement and correction software progress and plans
/ Tomás, Rogelio (CERN) ; Cardona, Javier (Colombia, U. Natl.) ; Carlier, Felix (CERN) ; Coello, Jaime (CERN) ; Dilly, Joschua (CERN) ; Fol, Elena (CERN) ; Garcia-Tabares, Ana (CERN) ; Hofer, Michael (CERN) ; Maclean, Ewen (CERN) ; Malina, Lukas (CERN) et al.
LHC Optics Measurements and Corrections (OMC) require efficient on-line software applications to acquire and analyze data and to compute the necessary corrections. During Run 2 various measurement and correction techniques have been merged to yield unprecedented optics quality, increasing the required number of steps to finalize the optics commissioning and the size of the software project. [...]
2019 - 4 p.
- Published in : 10.18429/JACoW-IPAC2019-WEPGW116
Fulltext from publisher: PDF;
In : 10th International Particle Accelerator Conference, Melbourne, Australia, 19 - 24 May 2019, pp.WEPGW116
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