CERN Accelerating science

ATS Notes

Последно добавени:
2016-02-05
09:54
Linac3 LEBT beam measurements during the 2014-2015 Argon ion run / Bellodi, Giulia (CERN) ; Lombardi, Alessandra (CERN) ; Maintrot, Marc (CERN) ; Toivanen, Ville Aleksi (CERN)
Between Spring 2014 and Spring 2015, LINAC3 delivered a beam of Argon ions. [...]
CERN-ACC-NOTE-2016-0026.
- 2016. - 24 p.
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2016-02-04
14:38
Amplitude dependent closest tune approach / Tomas Garcia, Rogelio (CERN) ; Persson, Tobias Hakan Bjorn (CERN) ; Franchi, Andrea ; Maclean, Ewen Hamish (CERN)
Recent observations in the LHC point to the existence of an amplitude dependent closest tune approach. [...]
CERN-ACC-NOTE-2016-0025.
- 2016. - 11 p.
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2016-02-01
11:06
LHC BFPP Quench Test with Ions (2015) / Schaumann, Michaela (CERN) ; Alemany Fernandez, Reyes (CERN) ; Bahamonde Castro, Cristina (CERN) ; Auchmann, Bernhard (CERN) ; Chetvertkova, Vera (GSI - Helmholtzzentrum fur Schwerionenforschung GmbH (DE)) ; Giachino, Rossano (CERN) ; Jowett, John (CERN) ; Kalliokoski, Matti (Helsinki Institute of Physics (FI)) ; Lechner, Anton (CERN) ; Mertens, Tom (CERN) et al.
The 2015 Pb-Pb collision run of the LHC operated at a beam energy of 6.37Z TeV [...]
CERN-ACC-NOTE-2016-0024.
- 2016.

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2016-01-28
09:31
MD 402: Head-on limits. Separation leveling. / Barranco Garcia, Javier (Ecole Polytechnique Federale de Lausanne (CH)) ; Buffat, Xavier (CERN) ; Pieloni, Tatiana (CERN) ; Tambasco, Claudia (Ecole Polytechnique Federale de Lausanne (CH)) ; Crouch, Matthew ; Salvachua Ferrando, Belen Maria (CERN) ; Pojer, Mirko (CERN) ; Trad, Georges (CERN) ; Solfaroli Camillocci, Matteo (CERN) ; Jacquet, Delphine (CERN) et al.
HL-LHC will rely on very large beam-beam head-on shift and spread. [...]
CERN-ACC-NOTE-2016-0023.
- 2016. - 6 p.

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2016-01-27
09:48
MD 754: Instability Threshold for Train with 25ns Spacing / Carver, Lee Robert (CERN) ; Astapovych, Daria ; Biancacci, Nicolo (CERN) ; Iadarola, Giovanni (CERN) ; Levens, Tom (University of Glasgow (GB)) ; Metral, Elias (CERN) ; Salvant, Benoit (CERN) ; Wang, Na
Measurements made since the beginning of run II at 6.5 TeV have shown that there is a large discrepancy in the instability thresholds between single bunches and trains of 72 bunches with 25ns spacing, whereas the same result is expect for pure impedance-induced instabilities. [...]
CERN-ACC-NOTE-2016-0022.
- 2016. - 9 p.
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2016-01-21
10:18
Injection quality measurements with diamond based particle detectors / Stein, Oliver (Hamburg University (DE)) ; Burkart, Florian (CERN)
During the re-commissioning phase of the LHC after the long shutdown 1 very high beam losses were observed at the TDI during beam injection. [...]
CERN-ACC-NOTE-2016-0021.
- 2016. - 10 p.
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2016-01-19
15:02
MD 400: LHC emittance growth in presence of an external source of noise during collision / Barranco Garcia, Javier (Ecole Polytechnique Federale de Lausanne (CH)) ; Buffat, Xavier (CERN) ; Pieloni, Tatiana (CERN) ; Tambasco, Claudia (Ecole Polytechnique Federale de Lausanne (CH)) ; Trad, Georges (CERN) ; Valuch, Daniel (CERN) ; Betz, Michael (CERN) ; Wendt, Manfred (CERN) ; Pojer, Mirko (CERN) ; Solfaroli Camillocci, Matteo (CERN) et al.
The interplay between head-on beam-beam interaction and external sources of noise can be a significant source of emittance growth, especially when considering large beam-beam tune shifts as for the HL-LHC upgrade project. [...]
CERN-ACC-NOTE-2016-0020.
- 2016. - 9 p.

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2016-01-18
17:27
Long range beam-beam interaction and the effect on the beam and luminosity lifetimes / Crouch, Matthew (University of Manchester, Manchester, U.K / The Cockcroft) ; Pieloni, Tatiana (CERN) ; Barranco Garcia, Javier (Ecole Polytechnique Federale de Lausanne (CH)) ; Banfi, Danilo ; Buffat, Xavier (CERN) ; Tambasco, Claudia (Ecole Polytechnique Federale de Lausanne (CH)) ; Alexahin, Yuri ; Bruce, Roderik (CERN) ; Giachino, Rossano (CERN) ; Pojer, Mirko (CERN) et al.
Identifying the minimum crossing angle achievable in the LHC is a key parameter to identify the collider luminosity reach [...]
CERN-ACC-NOTE-2016-0019.
- 2016. - 12 p.

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2016-01-18
15:23
MD 239 on Collide and Squeeze (part 2) / Gorzawski, Arkadiusz (Ecole Polytechnique Federale de Lausanne (CH)) ; Mirarchi, Daniele (CERN) ; Salvachua Ferrando, Belen Maria (CERN) ; Wenninger, Jorg (CERN)
Colliding the beams during the squeeze to profit from Landau damping due to head--on beam-beam and beta--star leveling are two operational modes that may have to be used in a not so distant future at the LHC. [...]
CERN-ACC-NOTE-2016-0018.
- 2016.
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2016-01-18
10:37
TCDQ-TCT retraction and losses during asynchronous beam dump / Bracco, Chiara (CERN) ; Bruce, Roderik (CERN) ; Quaranta, Elena (Politecnico di Milano (IT))
The protection provided by the TCDQs in case of asynchronous beam dump depends strongly on their correct setup. [...]
CERN-ACC-NOTE-2016-0017.
- 2016. - 15 p.
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