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ATS Notes

Derniers ajouts:
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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2017-03-06
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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2017-02-10
18:45
Code Development for Collective Effects / Bruce Li, Kevin Shing (CERN) ; Bartosik, Hannes (CERN) ; Hegglin, Stefan Eduard (Eidgenoessische Tech. Hochschule Zuerich (CH)) ; Iadarola, Giovanni (CERN) ; Oeftiger, Adrian (CERN) ; Passarelli, Andrea (Technische Universitaet Darmstadt (DE)) ; Romano, Annalisa (Technische Universitaet Darmstadt (DE)) ; Rumolo, Giovanni (CERN) ; Schenk, Michael (Ecole Polytechnique Federale de Lausanne (CH))
The presentation will cover approaches and strategies of modeling and implementing collective effects in modern simulation codes. [...]
CERN-ACC-NOTE-2017-0008.
- 2016. - 7 p.
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2017-01-23
15:09
Space Charge Mitigation With Longitudinally Hollow Bunches / Oeftiger, Adrian (CERN) ; Hancock, Steven (CERN) ; Rumolo, Giovanni (CERN)
Suitably, hollow longitudinal phase space distributions have a flat profile and hence reduce the impact of transverse space charge. [...]
CERN-ACC-NOTE-2017-0007.
- 2016. - 6 p.
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2017-01-23
11:40
RF Measurements and Tuning of the 750 MHz HF-RFQ / Koubek, Benjamin (CERN) ; Grudiev, Alexej (CERN) ; Timmins, Marc (CERN)
In the frame of the program on medical applications CERN has built a compact 750 MHz RFQ to be used as an injector for a hadron therapy linac. [...]
CERN-ACC-NOTE-2017-0006.
- 2017.
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LHC MD Notes (63)