CERN Accelerating science

LHC MD Notes

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2020-10-27
16:18
MD2490 – Measurement of the TMCI threshold at flat-top in the LHC / Albert, Markus (CERN) ; Amorim, David (Universite Grenoble-Alpes (FR)) ; Antipov, Sergey ; Biancacci, Nicolo (CERN) ; Buffat, Xavier (CERN) ; Carver, Lee Robert (University of Liverpool (GB)) ; Fuchsberger, Kajetan ; Mereghetti, Alessio ; Metral, Elias (CERN) ; Mounet, Nicolas (CERN) et al.
This report summarizes the results of MD2490 on the measurement of the intensity threshold of the Transverse Mode Coupling Instability (TMCI) in the LHC at flat top. [...]
CERN-ACC-NOTE-2020-0056.
- 2020.

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2020-10-06
17:47
MD3310 – Complex tune shift measurement at flat-top in the LHC / Amorim, David (Universite Grenoble-Alpes (FR)) ; Antipov, Sergey ; Biancacci, Nicolo (CERN) ; Buffat, Xavier (CERN) ; Giordano, Francesco (Universita e sezione INFN di Napoli (IT)) ; Hemelsoet, Georges-Henry (CERN) ; Levens, Tom (CERN) ; Metral, Elias (CERN) ; Mounet, Nicolas (CERN) ; Ribes Metidieri, Ariadna (University of Barcelona (ES)) et al.
This note summarises the MD3310 activity. [...]
CERN-ACC-NOTE-2020-0053.
- 2020. - 6 p.
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2020-09-25
10:47
MD 3603: Dynamic Aperture with uncorrected dipole b3 / Hofer, Michael (Vienna University of Technology (AT)) ; Carlier, Felix Simon (Technische Universiteit Delft (NL)) ; Dilly, Joschua Werner (Humboldt University of Berlin (DE)) ; Fol, Elena (Goethe University Frankfurt (DE)) ; Garcia-Tabares Valdivieso, Ana (Universidad Complutense (ES)) ; Maclean, Ewen Hamish (CERN) ; Malina, Lukas (CERN) ; Persson, Tobias Hakan Bjorn (CERN) ; Coello De Portugal - Martinez Vazquez, Jaime Maria ; Solfaroli Camillocci, Matteo (CERN) et al.
The hadron collider options currently investigated as part of the FCC study rely on the use of dipoles with a field strength of 16 T or above in order to achieve the targeted collision energy. [...]
CERN-ACC-NOTE-2020-0049.
- 2020. - 22 p.
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2020-09-25
10:42
MD3287: Luminosity scans with waist shifts / Coello De Portugal - Martinez Vazquez, Jaime Maria ; Fol, Elena (Goethe University Frankfurt (DE)) ; Malina, Lukas (CERN) ; Tomas Garcia, Rogelio (CERN)
This note reports on the first measurements of the beam waist displacements in the LHC using luminosity scans. [...]
CERN-ACC-NOTE-2020-0048.
- 2020. - 11 p.
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2020-08-13
11:16
PROTON-BEAM MACRO-PARTICLE INTERACTION: BEAM DUMPS AND QUENCHES / Auchmann, Bernhard (CERN) ; Baer, Thomas Martin ; Lechner, Anton (CERN) ; Riegler, Werner (CERN) ; Rowan, Scott ; Schindler, Heinrich (CERN) ; Schmidt, Rudiger (GSI - Helmholtzzentrum fur Schwerionenforschung GmbH (DE)) ; Zimmermann, Frank (CERN)
We derive a model for the time evolution of beam losses due to macro particles falling into the LHC proton beam. [...]
CERN-ACC-NOTE-2020-0041.
- 2014. - 19 p.
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2020-07-01
12:55
MD 2935: 16L2 solenoid tests / Salvant, Benoit (CERN) ; Albert, Markus (CERN) ; Arduini, Gianluigi (CERN) ; Buffat, Xavier (CERN) ; Collier, Paul (CERN) ; Gorzawski, Arkadiusz (University of Malta (MT)) ; Grob, Laura Katharina ; Iadarola, Giovanni (CERN) ; Lechner, Anton (CERN) ; Levens, Tom (CERN) et al.
This MD allowed confirming that the solenoid installed in 16L2 during Technical Stop 2 (TS22017) could be held responsible for the performance improvement observed after TS2. [...]
CERN-ACC-NOTE-2020-0038.
- 2020. - 8 p.
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2020-06-24
14:20
Progress report : UFO Dynamics studies / Belanger, Philippe (Universite de Montreal (CA))
(From the collaboration on UFO studies between TRIUMF and CERN HL-LHC)
CERN-ACC-NOTE-2020-0037.
- 2020.
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2020-06-24
14:19
Progress report : UFO Dynamics studies / Belanger, Philippe (Universite de Montreal (CA))
(From the collaboration on UFO studies between TRIUMF and CERN HL-LHC)
CERN-ACC-NOTE-2020-0036.
- 2019.
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2020-06-12
17:02
MD3308 – Growth rate versus chromaticity measurement at injection / Amorim, David (CERN) ; Antipov, Sergey (CERN) ; Buffat, Xavier (CERN) ; Carideo, Emanuela (CERN) ; Dascalu, Titus-Stefan (CERN) ; Metral, Elias (CERN) ; Mounet, Nicolas (CERN) ; Oeftiger, Adrian (CERN) ; Salvant, Benoit (CERN) ; Valuch, Daniel (CERN)
This report summarises the results of MD3308 on the measurement of the instability rise time as a function of chromaticity in the LHC. [...]
CERN-ACC-NOTE-2020-0034.
- 2020. - 8 p.
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2020-06-12
16:42
MD3318 – Impedance Contribution of Secondary and Tertiary Collimators / Amorim, David (Universite Grenoble-Alpes (FR)) ; Antipov, Sergey ; Biancacci, Nicolo (CERN) ; Buffat, Xavier (CERN) ; Mereghetti, Alessio (CERN) ; Metral, Elias (CERN) ; Redaelli, Stefano (CERN) ; Salvant, Benoit (CERN) ; Soderen, Martin (CERN) ; Valuch, Daniel (CERN)
This report summarises the results of MD3318 about impedance measurements of individual LHC secondary and tertiary collimators. [...]
CERN-ACC-NOTE-2020-0033.
- 2020. - 11 p.
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