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ATS Notes

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2013-06-05
08:53
Simple models for the integrated luminosity / Wenninger, J
In this note simple analytic expressions are derived to model the integrated luminosity of the LHC for the case of exponential luminosity decays as well as for leveled luminosity evolutions. [...]
CERN-ATS-Note-2013-033 PERF. - 2013.
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2013-05-30
08:36
Radiation Levels around the LHC / Mala, P ; Brugger, M ; Calviani, M ; Nordt, A
This work discuss on the radiation levels measured around the LHC machine during the 2012 operational year. [...]
CERN-ATS-Note-2013-032 TECH TECH. - 2013. - 34 p.

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2013-05-29
15:09
Optimal RF Conditioning of Advanced Photon Source (APS) Fundamental Power Coupler / Montesinos, E (-) ; Trento, G (ANL-APS)
Experience at many laboratories regarding conditioning of RF Fundamental Power Couplers (FPC) has shown that it is a very apprehensive and laborious process [...]
CERN-ATS-Note-2013-031 TECH. - 2013.
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2013-05-27
14:16
Future wishes and constraints from the experiments at the LHC for the proton-proton program / Jacobsson, R
Hosting six different experiments at four different interaction points and widely different requirements for the running conditions, the LHC machine has been faced with a long list of challenges in the first three years of luminosity production 2010 – 2012 (Run 1), many of which were potentially capable of limiting the performance due to instabilities resulting from the extremely high bunch brightness [...]
CERN-ATS-Note-2013-030 PERF ; CERN-LHCb-PROC-2013-029. - 2013. - 15 p.
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2013-05-08
11:29
1% calibration errors in MQY magnets / Bach, T ; Hagen, Per ; Langner, A ; Levinsen, Y ; McAteer, M ; Maclean, E H ; Persson, T ; Skowronski, P ; Tomás, R ; Todesco, E et al.
Errors in the range of 1% have been observed for the MQY magnets in beam-based measurements. [...]
CERN-ATS-Note-2013-029 MD. - 2013.
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2013-04-22
16:50
IR8 Aperture Measurements at injection energy / Bruce, R ; Giovannozzi, M ; Hermes, P D ; Holzer, B ; Nosych, A A ; Redaelli, S ; Wenninger, J
This report describes aperture measurements in the IR8 triplet region performed during the MD block 4 on 29 of November 2012. [...]
CERN-ATS-Note-2013-026 MD. - 2013.
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2013-04-22
16:46
Non-linear beam dynamics tests in the LHC: measurement of intensity decay for probing dynamic aperture at injection / Cettour Cave, S ; De Maria, R ; Giovannozzi, M ; Ludwig, M ; MacPherson, A ; Redaelli, S ; Roncarolo, F ; Solfaroli Camillocci, M ; Venturini Delsolaro, W
For a second year in a row dynamic aperture experiments have been performed at the LHC. [...]
CERN-ATS-Note-2013-025 MD. - 2013.
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2013-04-16
10:43
Vertical Crossing Angle in IR8 / Holzer , B J ; Versteegen, R ; Alemany, R
The operation of the LHCb spectrometer dipole has a considerably larger and more challenging impact on the geometry of the LHC beams than the magnets in the high luminosity regions [1]. [...]
CERN-ATS-Note-2013-024 PERF. - 2013.
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2013-04-16
10:39
Understanding the tune, coupling, and chromaticity dependence of the LHC on Landau octupole powering. / Maclean, E H ; Giovannozzi, M ; Persson, T ; Tomas, R ; Wenninger, J
During the 2012 LHC run several observations were made of shifts to tune, coupling and chromaticity which were correlated with changes in the powering of Landau octupoles. [...]
CERN-ATS-Note-2013-023 TECH. - 2013. - 27 p.

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2013-04-16
10:33
Non-linear beam dynamics tests in the LHC: LHC dynamic aperture MD on Beam 2 (24th of June 2012) / Maclean, E H ; Moeckel, S ; Persson, T H B ; Redaelli, S ; Schmidt, F ; Tomas, R ; Uythoven, J
This MD note summarizes measurements performed on LHC Beam 2 during the non-linear machine development (MD) of 24 June 2012 [...]
CERN-ATS-Note-2013-022 MD. - 2013. - 34 p.

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