CERN Accelerating science

SPS and CNGS

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2016-07-25
11:01
Intensity effects in the formation of stable islands in phase space during the multi-turn extraction process at the CERN PS / machida, Shinji (STFC) ; Prior, Chris ; Gilardoni, Simone (CERN) ; Giovannozzi, Massimo (CERN) ; Hirlander, Simon (Graz University of Technology (AT)) ; Huschauer, Alexander (CERN)
The CERN PS utilises a Multi-Turn Extraction (MTE) scheme to stretch the beam pulse length to optimise the filling process of the SPS. [...]
CERN-ACC-2016-0102.
- 2016. - 6 p.
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2016-07-20
14:05
Transverse beam splitting made operational: Recent progress of the multi-turn extraction at the CERN proton synchrotron / Huschauer, Alexander (CERN) ; Borburgh, Jan (CERN) ; Damjanovic, Sanja (GSI - Helmholtzzentrum fur Schwerionenforschung GmbH (DE)) ; Gilardoni, Simone (CERN) ; Giovannozzi, Massimo (CERN) ; Hourican, Michael (CERN) ; Kahle, Karsten (CERN) ; Michels, Olivier (CERN) ; Sterbini, Guido (CERN) ; Hernalsteens, Cedric et al.
Following a successful commissioning period, the Multi-Turn Extraction (MTE) at the CERN Proton Synchrotron (PS) has been applied for the fixed-target physics programme at the Super Proton Synchrotron (SPS) since September 2015. [...]
CERN-ACC-2016-0100.
- 2016. - 7 p.
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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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2016-07-18
10:41
Electron cloud in the CERN accelerator complex / Rumolo, Giovanni (CERN) ; Bartosik, Hannes (CERN) ; Belli, Eleonora (Universita e INFN, Roma I (IT)) ; Iadarola, Giovanni (CERN) ; Li, Kevin Shing Bruce (CERN) ; Mether, Lotta Maria (CERN) ; Romano, Annalisa (Technische Universitaet Darmstadt (DE)) ; Schenk, Michael (Ecole Polytechnique Federale de Lausanne (CH))
Operation with closely spaced bunched beams causes the build-up of an Electron Cloud (EC) in both the LHC and the two last synchrotrons of its injector chain (PS and SPS). [...]
CERN-ACC-2016-0099.
- 2016. - 7 p.

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2016-07-14
09:11
Use of RF quadrupole structures to enhance stability in accelerator rings / Schenk, Michael (Ecole Polytechnique Federale de Lausanne (CH)) ; Grudiev, Alexej (CERN) ; Li, Kevin Shing Bruce (CERN) ; Papke, Kai (CERN)
The beams required for the high luminosity upgrade of the Large Hadron Collider (HL-LHC) at CERN call for efficient mechanisms to suppress transverse collective instabilities. [...]
CERN-ACC-2016-0096.
- 2016. - 7 p.
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2016-07-12
06:01
Resonant converter topology for the new ISOLDE/CERN modulator / Redondo, L M (Lisbon, ISEL ; Lisbon U.) ; Fernando Silva, J (Lisbon U.) ; Canacsinh, H (Lisbon, ISEL) ; Mendes, J P M (Lisbon, ISEL) ; Rodrigues, M A (Lisbon, ISEL) ; Fowler, T (CERN)
This paper describes a new resonant converter topology, using a solid-state asymmetric bridge to increase the energy efficiency of the solid-state switching circuit being designed to replace the actual pulse transformer and thyratron based resonant modulator that supplies the 60 kV target potential for the ion acceleration of the On-Line Isotope Mass Separator ISOLDE accelerator. The preliminary results of a 5 kV laboratory prototype validate this concept, however the design of all components, including a high-voltage coil, as well as, the selection of the semiconductors proven to be crucial in order to reduce the energy dissipation during the recovery process..
2014 - 4 p. - Published in : 10.1109/IPMHVC.2014.7287222
In : 2014 IEEE International Power Modulator and High Voltage Conference, Santa Fe, NM, USA, 1 - 5 Jun 201, pp.119-122

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2016-07-12
06:01
Drive beam recombination optimization at CTF3 / Gamba, Davide (CERN ; Oxford U.)
The CLIC Test Facility (CTF3) installed at CERN has a scaled version of the CLIC design Drive-Beam Recombination Complex (DBRC). This complex is designed to recombine a long electron train into a shorter one but with increased bunch frequency and pulse current. [...]
2014 - 2 p. - Published in : 10.1109/BDO.2014.6890018
In : 20th International Workshop on Beam Dynamics and Optimization, Saint-Petersburg, Russia, 30 Jun - 4 Jul 2014, pp.6890018

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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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2016-06-26
20:43
Beam Dynamics Studies for High-Intensity Beams in the CERN Proton Synchrotron / Huschauer, Alexander
With the discovery of the Higgs boson, the existence of the last missing piece of the Standard Model of particle physics (SM) was confirmed [...]
CERN-THESIS-2016-061 - 178 p.

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