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Reconstruction of Transverse Phase Space From Transverse Feedback Data for Real Time Extraction of Vital LHC Machine Parameters
/ Kotzian, Gerd (CERN) ; Soderen, Martin (CERN) ; Solvang, Preben (CERN) ; Stopjakova, Viera (Bratislava, Inst. Phys.) ; Valuch, Daniel (CERN)
The LHC transverse feedback system (ADT) provides bunch by bunch, turn by turn, normalized and digitized beam position signals from four pick-ups per plane and for each beam. Together with already existing powerful computer-based observation systems, this data can be used to reconstruct in real-time the transverse phase space coordinates of the centre-of-charges, for each individual bunch. [...]
2022 - 4 p.
- Published in : JACoW IPAC 2022 (2022) 937-940
Fulltext: PDF;
In : 13th International Particle Accelerator Conference (IPAC 2022), Bangkok, Thailand, 12 - 17 Jun 2022, pp.937-940
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Linac3, LEIR and PS Performance with Ions in 2021 and Prospects for 2022
/ Biancacci, Nicolo (CERN) ; Albright, Simon (CERN) ; Alemany-Fernández, Reyes (CERN) ; Alves, Diogo (CERN) ; Angoletta, Maria Elena (CERN) ; Barrientos, Diego (CERN) ; Bartosik, Hannes (CERN) ; Bellodi, Giulia (CERN) ; Bertolo, Sebastien (CERN) ; Bodart, Dominique (CERN) et al.
CERN accelerators underwent a period of long shutdown from the end of 2018 to 2020. During this time frame, significant hardware and software upgrades have been put in place to increase the performance of both proton and ion accelerator chains in the High Luminosity LHC era. [...]
2022 - 4 p.
- Published in : JACoW IPAC 2022 (2022) 1983-1986
Fulltext: PDF;
In : 13th International Particle Accelerator Conference (IPAC 2022), Bangkok, Thailand, 12 - 17 Jun 2022, pp.1983-1986
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Review of LEIR operation in 2018
/ Albright, Simon (CERN) ; Alemany Fernandez, Reyes (CERN) ; Angoletta, Maria Elena (CERN) ; Bartosik, Hannes (CERN) ; Beaumont, Anthony (CERN) ; Bellodi, Giulia (CERN) ; Biancacci, Nicolo (CERN) ; Bozzolan, Michele (CERN) ; Buzio, Marco (CERN) ; Di Lorenzo, Francesco (CERN) et al.
During run 2 (2015-2018) the LEIR machine experienced several important improvements in terms of extracted intensity, driven by the LHC Injectors Upgrade (LIU) project requirements. [...]
CERN-ACC-Note-2020-0023.
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2019. - 113 p.
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Transverse beam dynamics studies with high intensity LHC beams in the SPS
/ Carlà, Michele (CERN) ; Bartosik, Hannes (CERN) ; Beck, Mario (CERN) ; Carver, Lee (CERN ; U. Liverpool (main)) ; Kain, Verena (CERN) ; Kotzian, Gerd (CERN) ; Li, Kevin (CERN) ; Rumolo, Giovanni (CERN) ; Zannini, Carlo (CERN)
In order to reach the target beam parameters of the LHC injectors upgrade (LIU), about twice the presently operational intensity of LHC type beams has to be achieved. Although the planned upgrade of the main RF system will occur during the long shutdown, a series of measurements have been performed to assess the beam dynamics challenges with these very high intensity beams on the long SPS injection plateau. [...]
CERN-ACC-2019-083.-
2019 - 4 p.
- Published in : 10.18429/JACoW-IPAC2019-MOPTS089
Fulltext from publisher: PDF;
In : 10th International Particle Accelerator Conference, Melbourne, Australia, 19 - 24 May 2019, pp.MOPTS089
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Commissioning of a new digital transverse damper system at the PSB
/ Di Giovanni, Gian Piero (CERN) ; Antoniou, Fanouria (CERN) ; Blas, Alfred (CERN) ; Brischetto, Ylenia (CERN) ; Findlay, Alan (CERN) ; Kotzian, Gerd (CERN) ; Mikulec, Bettina (CERN) ; Sterbini, Guido (CERN)
At the CERN Proton Synchrotron Booster, PSB, an analog transverse damper system has been in operation since 1999, providing satisfactory operational results with the proton beam supplied by Linac2. As a consequence of the LHC Injectors Upgrade, the PSB will face new challenges imposed by higher intensity, injection and extraction energy. [...]
CERN-ACC-2019-087.-
2019 - 4 p.
- Published in : 10.18429/JACoW-IPAC2019-MOPTS085
Fulltext from publisher: PDF;
In : 10th International Particle Accelerator Conference, Melbourne, Australia, 19 - 24 May 2019, pp.MOPTS085
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The CERN SPS Low Level RF upgrade project
/ Hagmann, Gregoire (CERN) ; Baudrenghien, Philippe (CERN) ; Betz, Jochen (CERN) ; Egli, Julien (CERN) ; Galindo Guarch, Francisco Javier (Barcelona, Polytechnic U.) ; Kotzian, Gerd (CERN) ; Rizzi, Mattia (CERN) ; Schmid, Lorenz (CERN) ; Spierer, Arthur (CERN) ; Włostowski, Tomasz (CERN)
The High Luminosity LHC project (HL-LHC) calls for the doubling of the beam intensity injected from the Super Proton Synchrotron (SPS). This is not possible with the present RF system consisting of four 200 MHz cavities. [...]
CERN-ACC-2019-124.-
2019 - 4 p.
- Published in : 10.18429/JACoW-IPAC2019-THPRB082
Fulltext from publisher: PDF;
In : 10th International Particle Accelerator Conference, Melbourne, Australia, 19 - 24 May 2019, pp.THPRB082
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Noise studies with new ADT pickups (MD4143)
/ Buffat, Xavier (CERN) ; Albert, Markus (CERN) ; Amorim, David (Universite Grenoble-Alpes (FR)) ; Antipov, Sergey (CERN) ; Crockford, Guy (CERN) ; Furuseth, Sondre (EPFL - Ecole Polytechnique Federale Lausanne (CH)) ; Komppula, Jani Paavo Olavi ; Kotzian, Gerd (CERN) ; Mounet, Nicolas (CERN) ; Oeftiger, Adrian (GSI - Helmholtzzentrum fur Schwerionenforschung GmbH (DE)) et al.
An experiment aiming at characterizing the performance of a new engineering prototype for the ADT pickup readout electronics with a low noise floor from the point of view of beam stability and emittance growth in collision is described in this note [...]
CERN-ACC-NOTE-2019-0026.
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2019. - 12 p.
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Observations, Analysis and Mitigation of Recurrent LHC Beam Dumps Caused by Fast Losses in Arc Half-Cell 16L2
/ Jimenez, José (CERN) ; Amorim, David (CERN ; U. Grenoble Alpes) ; Antipov, Sergey (CERN) ; Arduini, Gianluigi (CERN) ; Bertarelli, Alessandro (CERN) ; Biancacci, Nicolo (CERN) ; Bradu, Benjamin (CERN) ; Bravin, Enrico (CERN) ; Bregliozzi, Giuseppe (CERN) ; Brodzinski, Krzysztof (CERN) et al.
Recurrent beam dumps significantly perturbed the operation of the CERN LHC in the summer months of 2017, especially in August. These unexpected beam dumps were triggered by fast beam losses that built up in the cryogenic beam vacuum at the half-cell 16 left of LHC-IP2 and were detected either at that location but mainly in the collimation insertions. [...]
CERN-ACC-2018-164.-
2018 - 4 p.
- Published in : 10.18429/JACoW-IPAC2018-MOPMF053
Fulltext: PDF;
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.MOPMF053
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