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2019-10-11
11:15
ATLAS Experiment Colouring Book in Chinese | 超环面仪器(ATLAS) 彩铅手绘本 / Anthony, Katarina (Universita degli Studi di Udine (IT))
Language: Chinese - The ATLAS Experiment Colouring Book is a free-to-download educational book, ideal for kids aged 5-9. [...]
ATLAS-OUTREACH-2019-004.
- 2019. - 16.
Language: Chinese

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2019-10-09
09:01
Report and Analysis from LHC MD 3311: Amplitude detuning at end-of-squeeze / Dilly, Joschua Werner (Humboldt University of Berlin (DE)) ; Albert, Markus (CERN) ; Argyropoulos, Theodoros (CERN) ; Carlier, Felix Simon (Technische Universiteit Delft (NL)) ; Hofer, Michael (Vienna University of Technology (AT)) ; Malina, Lukas (CERN) ; Maclean, Ewen Hamish (University of Malta (MT)) ; Solfaroli Camillocci, Elena (Sapienza Universita e INFN, Roma I (IT)) ; Tomas Garcia, Rogelio (CERN)
Amplitude detuning at end-of-squeeze is measured during this MD, with both flat-orbit and crossing-angles in IP5. [...]
CERN-ACC-NOTE-2019-0042.
- 2019. - 39 p.
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2019-10-09
06:01
Operational results on the fully automatic LHC collimator alignment / Azzopardi, Gabriella (CERN ; U. Malta) ; Salvachua, Belen (CERN) ; Valentino, Gianluca (U. Malta) ; Redaelli, Stefano (CERN) ; Muscat, Adrian (U. Malta)
The Large Hadron Collider has a complex collimation system installed to protect its sensitive equipment from normal and abnormal beam losses. The collimators are set around the beam following a multistage transverse setting hierarchy. [...]
2019 - 15 p. - Published in : Phys. Rev. Accel. Beams 22 (2019) 093001 Fulltext from publisher: PDF;

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2019-10-09
06:01
Operational performance of the machine protection systems of the Large Hadron Collider during Run 2 and lessons learnt for the LIU/HL-LHC era / Zerlauth, Markus (CERN) ; Antoine, Alain (CERN) ; Bartmann, Wolfgang (CERN) ; Bracco, Chiara (CERN) ; Carlier, Etienne (CERN) ; Charifoulline, Zinour (CERN) ; Denz, Reiner (CERN) ; Goddard, Brennan (CERN) ; Lechner, Anton (CERN) ; Magnin, Nicolas (CERN) et al.
The Large Hadron Collider (LHC) has successfully completed its second operational run in December 2018. To allow for the completion of the diverse physics program at 6.5 TeV, the machine has been routinely operating with stored beam energies up to 300 MJ per beam during high intensity proton runs as well as being frequently reconfigured to allow for special physics runs and important machine development studies. [...]
2019 - 4 p. - Published in : 10.18429/JACoW-IPAC2019-THPRB031 Fulltext from publisher: PDF;
In : 10th International Particle Accelerator Conference, Melbourne, Australia, 19 - 24 May 2019, pp.THPRB031

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2019-10-08
19:34
Beam-induced heat loads on the beam screens of the HL-LHC arcs / Skripka, Galina (Joint Institute for Nuclear Research (RU)) ; Iadarola, Giovanni (CERN)
The heat load on the beam screens of cold magnets and drift sections in the HL-LHC arcs is estimated considering power deposition from impedance, synchrotron radiation and electron cloud. [...]
CERN-ACC-NOTE-2019-0041.
- 2019. - 25 p.
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2019-10-08
12:00
Report on the Prompt Dose Distribution Along the LHC Based on BLM Data for proton-proton operation in Run 2 / Bilko, Kacper (CERN) ; Stein, Oliver
In this report dose levels and the distributions of the prompt total ionising dose along the LHC for the proton-proton operation are presented for Run 2, covering the accelerator operation periods in 2015, 2016, 2017 and 2018. [...]
CERN-ACC-NOTE-2019-0040.
- 2019. - 126 p.
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2019-10-08
08:15
Transverse impedance measurements and simulations of the LHC injection kicker magnet / Vlachodimitropoulos, Vasileios (CERN) ; Barnes, Michael (CERN) ; Chmielinska, Agnieszka (Ecole Polytechnique, Lausanne ; CERN) ; Ducimetière, Laurent (CERN)
Kicker magnets contribute significantly to the total impedance budget of many accelerators. Of particular interest, from a beam stability point of view, is the transverse beam coupling impedance (TBCI) that is used to determine intensity limitations of a machine. [...]
2019 - 4 p. - Published in : 10.18429/JACoW-IPAC2019-THPRB075 Fulltext from publisher: PDF;
In : 10th International Particle Accelerator Conference, Melbourne, Australia, 19 - 24 May 2019, pp.THPRB075

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2019-10-08
08:15
Operational experience of a prototype LHC injection kicker magnet with a low SEY coating and redistributed power deposition / Barnes, Michael (CERN) ; Bracco, Chiara (CERN) ; Bregliozzi, Giuseppe (CERN) ; Chmielinska, Agnieszka (Ecole Polytechnique, Lausanne ; CERN) ; Ducimetière, Laurent (CERN) ; Goddard, Brennan (CERN) ; Iadarola, Giovanni (CERN) ; Kramer, Thomas (CERN) ; Vega Cid, Lorena (Madrid, Polytechnic U. ; CERN) ; Vlachodimitropoulos, Vasileios (CERN) et al.
In the event that it is necessary to exchange an LHC injection kicker magnet (MKI), the newly installed kicker magnet would limit operation for a few hundred hours due to dynamic vacuum. A surface coating with a low secondary electron yield, applied to the inner surface of an alumina tube to reduce dynamic vacuum activity without increasing the probability of Unidentified Falling Objects, and which is compatible with the high voltage environment, was included in an upgraded MKI installed in the LHC during the 2017-18 Year End Technical Stop. [...]
2019 - 4 p. - Published in : 10.18429/JACoW-IPAC2019-THPRB072 Fulltext from publisher: PDF;
In : 10th International Particle Accelerator Conference, Melbourne, Australia, 19 - 24 May 2019, pp.THPRB072

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2019-09-26
16:45
Reliability Considerations for the LHC MKB Re-trigger Upgrade During LS2 / Renner, Elisabeth (Vienna University of Technology (AT)) ; Bartmann, Wolfgang (CERN) ; Benedikt, Michael (CERN) ; Magnin, Nicolas (CERN) ; Wiesner, Christoph (CERN)
An upgrade of the LHC dilution kicker system (MKB) during LS2 foresees the new implementation of a MKB re-trigger mechanism. [...]
CERN-ACC-2019-0055.
- 2018. - 37 p.
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2019-09-24
06:39
Effect of ground motion introduced by HL-LHC CE work on LHC beam operation / Schaumann, Michaela (CERN) ; Gamba, Davide (CERN) ; Guinchard, Michael (CERN) ; Scislo, Lukasz (CERN ; Cracow Tech. U.) ; Wenninger, Jorg (CERN)
The official groundbreaking of the civil engineering (CE) work for the high luminosity upgrade of the LHC started on 15 June 2018 parallel to LHC beam operation. Compactor work and shaft excavation around the two low beta experiments, ATLAS and CMS, were expected to induce vibrations to the accelerator magnets and cause orbit disturbance, beam loss and potentially premature beam dumps. [...]
2019 - 4 p. - Published in : 10.18429/JACoW-IPAC2019-THPRB116 Fulltext from publisher: PDF;
In : 10th International Particle Accelerator Conference, Melbourne, Australia, 19 - 24 May 2019, pp.THPRB116

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