CERN Accelerating science

LHC

Последние добавления:
2017-03-17
15:27
Linear coupling dependence on intensity and a next step towards a feedback (MD1850) / Persson, Tobias Hakan Bjorn (CERN) ; Baud, Guillaume (CERN) ; Coello De Portugal - Martinez Vazquez, Jaime Maria (Universitat Politecnica Catalunya (ES)) ; Gasior, Marek (CERN) ; Giovannozzi, Massimo (CERN) ; Olexa, Jakub (CERN) ; Tomas Garcia, Rogelio (CERN) ; Garcia-Tabares Valdivieso, Ana (Universidad Complutense (ES)) ; Valuch, Daniel (CERN)
Transverse coupling has proven to be an important variable to control beam dynamics and performance in the LHC. [...]
CERN-ACC-2017-0008.
- 2017. - 11 p.
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2017-03-16
16:38
Orbit Feedback Operation with RCBX (MD 1209) / Wenninger, Jorg (CERN) ; Jackson, Stephen (CERN) ; Nisbet, David (CERN) ; Ponce, Laurette (CERN) ; Louro Alves, Diogo Miguel (CERN)
The LHC Orbit Feedback (OFB) is able to drive any orbit corrector circuit (COD) to steer the LHC orbit. [...]
CERN-ACC-NOTE-2017-0015.
- 2017.
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2017-03-16
06:20
High Luminosity LHC: challenges and plans / Arduini, G (CERN) ; Barranco, J (CERN) ; Bertarelli, A (CERN) ; Biancacci, N (CERN) ; Bruce, R (CERN) ; Brüning, O (CERN) ; Buffat, X (CERN) ; Cai, Y (KIPAC, Menlo Park ; Kyoto U. ; SLAC) ; Carver, L R (CERN) ; Fartoukh, S (CERN) et al.
The Large Hadron Collider (LHC) is one of the largest scientific instruments ever built. Since opening up a new energy frontier for exploration in 2010, it has gathered a global user community working in fundamental particle physics and the physics of hadronic matter at extreme temperature and density. [...]
FERMILAB-CONF-16-621-AD-APC.- 2016 - Published in : J. Instrum. 11 (2016) C12081 Fulltext: PDF; IOP Open Access article: PDF; External link: FERMILABCONF
In : 14th Topical Seminar on Innovative Particle and Radiation Detectors , Siena, Italy, 3 - 6 Oct 2016, pp.C12081

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2017-03-06
11:42
Large Hadron Collider momentum calibration and accuracy / Wenninger, Jorg (CERN) ; Todesco, Ezio (CERN)
As a result of the excellent quality of the Large Hadron Collider (LHC) experimental detectors and the accurate calibration of the luminosity at the LHC, uncertainties on the LHC beam energy may contribute significantly to the measurement errors on certain observables unless the relative uncertainty is well below 1%. [...]
CERN-ACC-2017-0007.
- 2017. - 14 p.
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2017-03-06
10:50
MD1878: Operation with primary collimators at tighter settings / Mirarchi, Daniele (CERN) ; Amorim, David (Centre National de la Recherche Scientifique (FR)) ; Biancacci, Nicolo (CERN) ; Bruce, Roderik (CERN) ; Buffat, Xavier (CERN) ; Carver, Lee Robert (CERN) ; Fiascaris, Maria (CERN) ; Mereghetti, Alessio (CERN) ; Redaelli, Stefano (CERN) ; Rossi, Roberto (Universita e INFN, Roma I (IT)) et al.
Primary (TCP) collimators of the betatron cleaning insertion determine the betatron cut of the LHC beam. [...]
CERN-ACC-NOTE-2017-0014.
- 2017. - 14 p.
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2017-02-23
08:53
MD1228: Validation of Single Bunch Stability Threshold & MD1751: Instability Studies with a Single Beam / Carver, Lee Robert (CERN) ; Amorim, David (Universite Grenoble-Alpes (FR)) ; Biancacci, Nicolo (CERN) ; Buffat, Xavier (CERN) ; Iadarola, Giovanni (CERN) ; Lasocha, Kacper (Jagiellonian University (PL)) ; Li, Kevin Shing Bruce (CERN) ; Levens, Tom (University of Glasgow (GB)) ; Metral, Elias (CERN) ; Salvant, Benoit (CERN) et al.
Instabilities were being routinely observed in B1V during ADJUST. [...]
CERN-ACC-NOTE-2017-0013.
- 2017. - 13 p.
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2017-02-22
14:04
MD1831: Single Bunch Instabilities with Q" and Non-Linear Corrections / Carver, Lee Robert (CERN) ; Schenk, Michael (Ecole Polytechnique Federale de Lausanne (CH)) ; De Maria, Riccardo (CERN) ; Li, Kevin Shing Bruce (CERN) ; Amorim, David (Universite Grenoble-Alpes (FR)) ; Biancacci, Nicolo (CERN) ; Buffat, Xavier (CERN) ; Maclean, Ewen Hamish (CERN) ; Metral, Elias (CERN) ; Lasocha, Kacper (Jagiellonian University (PL)) et al.
During MD1751, it was observed that both a full single beam and 964 non-colliding bunches in Beam 1 (B1) and Beam 2 (B2) were both stable at the End of Squeeze (EOS) for 0A in the Landau Octupoles. [...]
CERN-ACC-NOTE-2017-0012.
- 2017. - 18 p.
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2017-02-22
13:53
MD2013: Tune shift along the batch at flat top / Carver, Lee Robert (CERN) ; Valuch, Daniel (CERN) ; Buffat, Xavier (CERN) ; Giovannozzi, Massimo (CERN) ; Iadarola, Giovanni (CERN) ; Metral, Elias (CERN) ; Salvant, Benoit (CERN)
A series of tests were performed that led to a measurement of the tune shift along a 96 bunch batch with 25ns spacing at flat top. [...]
CERN-ACC-NOTE-2017-0011.
- 2017. - 12 p.
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2017-02-22
13:41
LHC MD 1988: Automatic coupling correction test / Fol, Elena (University of Applied Sciences (DE)) ; Coello De Portugal - Martinez Vazquez, Jaime Maria (Universitat Politecnica Catalunya) ; Persson, Tobias Hakan Bjorn (CERN) ; Tomas Garcia, Rogelio (CERN)
This paper reports on the tests of new software development for automatic coupling correction and automatic model generation for data acquisition extending functionality of the Multiturn application..
CERN-ACC-NOTE-2017-0010.
- 2017. - 5 p.
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2017-02-15
09:50
Coupled-bunch instabilities due to fundamental cavity impedance / Mastoridis, Themistoklis (California Polytechnic State Univ. (US)) ; Baudrenghien, Philippe (CERN) ; Chapochnikova, Elena (CERN) ; Esteban Muller, Juan (CERN) ; Molendijk, John (CERN) ; Timko, Helga (CERN)
The purpose of this MD was to estimate the stability threshold due to longitudinal coupled-bunch instabilities (CBIs) driven by the RF cavities' fundamental impedance. [...]
CERN-ACC-NOTE-2017-0009.
- 2017.
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