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ATS Notes

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2016-09-30
10:27
Suppression of Amplitude dependent closest tune approach and first tests of the ADT as an AC-dipole (MD 1412) / Persson, Tobias Hakan Bjorn (CERN) ; Gasior, Marek (CERN) ; Maclean, Ewen Hamish (CERN) ; Olexa, Jakub (CERN) ; Tomas Garcia, Rogelio (CERN) ; Valuch, Daniel (CERN) ; Wierichs, David Alexander ; Carlier, Felix Simon (Technische Universiteit Delft (NL))
The amplitude detuning has been observed to decrease significantly as the horizontal and vertical tunes are approaching each other. [...]
CERN-ACC-NOTE-2016-0057. - 2016. - 6 p.

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2016-09-23
11:29
Coupling Measurements and Corrections for the Combined Ramp and Squeeze / Persson, Tobias Hakan Bjorn (CERN) ; Gorzawski, Arkadiusz (Ecole Polytechnique Federale de Lausanne (CH)) ; Langner, Andy Sven (CERN) ; Malina, Lukas (University of Oslo (NO)) ; Maclean, Ewen Hamish (CERN) ; Coello De Portugal - Martinez Vazquez, Jaime Maria (Universitat Politecnica Catalunya (ES)) ; Redaelli, Stefano (CERN) ; Salvachua Ferrando, Belen Maria (CERN) ; Schaumann, Michaela (CERN) ; Solfaroli Camillocci, Matteo (CERN) et al.
In operation of the LHC the ramp and the squeeze process have been independent beam processes up to now. [...]
CERN-ACC-NOTE-2016-0056. - 2016. - 6 p.

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2016-09-13
08:41
Time Optimal Synchronization Procedure and Associated Feedback Loops / Angoletta, Maria Elena (CERN) ; Pedersen, Flemming
A procedure to increase the speed of currently used synchronization loops in a synchrotron by an order of magnitude is presented. [...]
CERN-ACC-NOTE-2016-0055. - 2016. - 31 p.
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2016-09-12
14:54
Thermal Studies on the SPS Wideband Transverse Feedback Kicker / Roggen, Toon (CERN) ; Calaga, Rama (CERN) ; Hofle, Wolfgang (CERN) ; Montesinos, Eric (CERN)
As part of the SPS wideband transverse feedback system in the framework of the LHC Injector Upgrade (LIU) project, a wideband kicker design is being proposed. [...]
CERN-ACC-NOTE-2016-0054. - 2016. - 7 p.
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2016-08-26
09:32
Demonstration of coupling correction below the per-mil limit in the LHC / Maclean, Ewen Hamish (CERN) ; Carlier, Felix Simon (Technische Universiteit Delft (NL)) ; Fartoukh, Stephane (CERN) ; Persson, Tobias Hakan Bjorn (CERN) ; Skowronski, Piotr Krzysztof (CERN) ; Tomas Garcia, Rogelio (CERN) ; Wierichs, David Alexander
Linear coupling between betatron motion in the transverse planes is one of the key optics parameters for any accelerator. [...]
CERN-ACC-NOTE-2016-0053. - 2016. - 7 p.

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2016-07-28
09:00
Beam performance and instrumentation studies for the ProtoDUNE-DP experiment of CENF / Charitonidis, Nikolaos (CERN) ; Karyotakis, Yannis (LAPP (FR)) ; Efthymiopoulos, Ilias (CERN)
In this note, we address the beam performance (particle content, rates) with emphasis on the momentum determination and particle identification methods for the new H2-VLE (Very Low Energy) beam line that will serve the double phase ProtoDUNE experiment (also known as WA105), in the framework of the CENF project. [...]
CERN-ACC-NOTE-2016-0052 ; 27. - 2016.
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2016-07-19
08:43
Measurements on the SPS 200 MHz Travelling Wave Cavity towards an Impedance Model / Roggen, Toon (CERN) ; Calaga, Rama (CERN) ; Caspers, Fritz (European Scientific Institute (FR)) ; Vollinger, Christine (CERN)
This note discusses the contribution of the SPS 200 MHz TWC (Travelling Wave Cavity) to the SPS longitudinal impedance model. [...]
CERN-ACC-NOTE-2016-0051. - 2016.
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2016-07-08
14:57
Required modifications of the ESS accelerator architecture for ESSnuSB / Gerigk, Frank (CERN) ; Montesinos, Eric (CERN)
This report is a summary of major modifications to the ESS nominal linac layout, which are needed to enable the operation of the ESS linac as 5 MW proton driver for the ESSnuSB initiative in addition to its regular operation as 5 MW ESS proton source [...]
CERN-ACC-NOTE-2016-0050. - 2016.
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2016-07-06
10:55
Sub-LET Threshold SEE Cross Section Dependency with Ion Energy / Garcia Alia, Ruben (CERN) ; Bahamonde Castro, Cristina (CERN) ; Brandenburg, Sytze (University of Groningen) ; Brugger, Markus (CERN) ; Daly, Eamonn (ESA) ; Ferlet-Cavrois, Veronique (ESA) ; Gaillard, Remi ; Hoeffgen, Stefan (Fraunhofer INT) ; Menicucci, Alessandra (Universita e INFN Roma Tor Vergata (IT)) ; Metzger, Stefan (Fraunhofer INT) et al.
This study focuses on the ion species and energy dependence of the heavy ion SEE cross section in the sub-let threshold region through a set of experimental data. [...]
CERN-ACC-NOTE-2016-0049. - 2015. - 11 p.
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2016-07-06
10:38
SEL Hardness Assurance in a Mixed Radiation Field / Garcia Alia, Ruben (CERN) ; Brugger, Markus (CERN) ; Danzeca, Salvatore (CERN) ; Ferlet-Cavrois, Veronique (Rutherford Appleton Laboratory) ; Frost, Christopher (Consultant in St Arnoult France) ; Gaillard, Remi ; Mekki, Julien (Centre Spatial de Toulouse (FR)) ; Saigné, Frédéric (Institut d'Electronique du Sud, Université de Montpellier) ; Thornton, Adam (University of Surrey (GB)) ; Uznanski, Slawosz (CERN) et al.
This paper explores the relationship between monoenergetic and mixed-field Single Event Latchup (SEL) cross sections, concluding for components with a very strong energy dependence and highly-energetic environments, test results from monoenergetic or soft mixed-field spectra can significantly underestimate the operational failure rate. [...]
CERN-ACC-NOTE-2016-0048. - 2015. - 10 p.
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LHC MD Notes (50)