CERN Accelerating science

All CERN Accelerators documents

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2019-02-18
14:21
MD#4164: Separatrix folding with octupoles during slow extraction at SPS / Stoel, Linda (Vienna University of Technology (AT)) ; Fraser, Matthew Alexander (CERN) ; Goddard, Brennan (CERN) ; Kain, Verena (CERN) ; Velotti, Francesco Maria (CERN)
The powering of the SPS main octupole circuit (LOF) during third-integer slow extraction was tested to reduce the density of the beam impinging the wires of the electrostatic extraction septum (ZS) [...]
CERN-ACC-NOTE-2019-0004.
- 2019.

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2019-02-16
11:24
Design and Implementation of a Real-Time System Survey Functionality for Beam Loss Monitoring Systems / Hajdu, Csaba (Budapest University of Technology and Economics (HU)) ; Dabóczi, Tamás (dir.) (Budapest University of Technology and Economics (HU)) ; Zamantzas, Christos (dir.) (CERN)
This PhD thesis describes the design and implementation of a real-time system survey functionality for beam loss monitoring (BLM) systems, with a particular focus on signal processing aspects. In Part I, I introduce the basic concepts fundamental to the project. [...]
CERN-THESIS-2018-352.- 143 p. Fulltext: PDF; External link: Approve this document (restricted)

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2019-02-16
06:25
The ELENA facility / Bartmann, Wolfgang (CERN) ; Belochitskii, Pavel (CERN) ; Breuker, Horst (CERN) ; Butin, Francois (CERN) ; Carli, Christian (CERN) ; Eriksson, Tommy (CERN) ; Oelert, Walter (Mainz U.) ; Ostojic, Ranko (CERN) ; Pasinelli, Sergio (CERN) ; Tranquille, Gerard /ELENA ; AD
The CERN Antiproton Decelerator (AD) provides antiproton beams with a kinetic energy of 5.3 MeV to an active user community. The experiments would profit from a lower beam energy, but this extraction energy is the lowest one possible under good conditions with the given circumference of the AD. [...]
2018 - 10 p. - Published in : Philos. Trans. R. Soc. Lond. A 376 (2018) 20170266
In : Antiproton Physics in the ELENA Era : Theo Murphy meeting, Newport Pagnell, Buckinghamshire, UK, 4 - 5 Sep 2017, pp.20170266

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2019-02-14
07:22
Energy Density Method: An Approach for a Quick Estimation of Quench Temperatures in High-Field Accelerator Magnets / Salmi, Tiina (Tampere U. of Tech.) ; Schoerling, Daniel (CERN)
Accelerator magnets for future particle accelerators are designed to work with as high energy densities as possible to achieve high fields and compact magnet designs. A key factor limiting the energy density is given by the protection in case of a quench: If a quench occurs, the stored energy must be first absorbed by the windings, and the magnet temperature shall not exceed a given limit. [...]
2018 - 16 p. - Published in : IEEE Trans. Appl. Supercond. 29 (2018) 4900116

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2019-02-14
07:22
Upgrade of the NA61/SHINE Facility beyond 2020 for an Expanded Physics Programme / Larsen, Dag (Jagiellonian U.) /NA61/SHINE
The NA61/SHINE experiment studies hadron production in hadron-hadron, hadron-nucleus and nucleus-nucleus collisions. The physics programme includes the study of the onset of deconfinement and search for the critical point as well as reference measurements for neutrino and cosmic ray experiments. [...]
2019 - 18 p. - Published in : Universe 5 (2019) 24 Fulltext from Publisher: PDF;
In : 7th International Conference on New Frontiers in Physics, Kolymbari, Crete, Greece, 4 - 12 Jul 2018, pp.24

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2019-02-14
05:02
Simulations of an energy dechirper based on dielectric lined waveguides / Nie, Y. (CERN) ; Xia, G. (Manchester U. ; Cockcroft Inst. Accel. Sci. Tech.) ; Pacey, T. (Manchester U. ; Cockcroft Inst. Accel. Sci. Tech.)
Terahertz frequency wakefields can be excited by ultra-short relativistic electron bunches travelling through dielectric lined waveguide (DLW) structures. These wakefields can either accelerate a witness bunch with high gradient, or modulate the energy of the driving bunch. [...]
arXiv:1711.07244.- 2018-11-12 - 5 p. - Published in : Nucl. Instrum. Methods Phys. Res., A 909 (2018) 271-275 Fulltext from Publisher: PDF; Preprint: PDF;
In : 3rd European Advanced Accelerator Concepts Workshop, La Biodola, Isola d'Elba, Italy, 24 - 30 Sep 2017, pp.271-275

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2019-02-13
15:58
Note on the Efficiency of Differential Pumping in the LHC Polarized Gas Target (PGT) / Steffens, Erhard (University of Erlangen)
For a sufficient density of a window-less gas target based on a storage cell, a substantial gas flow rate is required, exceeding that of UHV vacuum systems. Therefore, differential pumping has to be applied in order to limit the gas flow into neighbouring sections. [...]
CERN-PBC-Notes-2019-002.- Geneva : CERN, 2019 Fulltext: PDF;

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2019-02-13
06:57
The PSD CBM Supermodule Response Study for Hadrons in Momentum Range 2 – 6 GeV/c at CERN Test Beams / Finogeev, D (Moscow, INR) ; Golubeva, M ; Guber, F (Moscow, INR) ; Ivashkin, A (Moscow, INR) ; Izvestnyy, A (Moscow, INR) ; Karpushkin, N (Moscow, INR) ; Morozov, S (Moscow, INR) ; Reshetin, A (Moscow, INR)
The Projectile Spectator Detector (PSD) will be used at the Compressed Baryonic Matter (CBM) experiment at FAIR to measure the centrality and orientation of the reaction plane in heavy-ion collisions. A study of PSD supermodule response at proton and pion momentum range 2 – 6 GeV has been done at the CERN T10 beam line. [...]
2018 - 7 p. - Published in : KnE Energ. Phys. 3 (2018) 333-339 Fulltext: PDF;
In : The 3rd International Conference on Particle Physics and Astrophysics, Moscow, Russia, 2 - 5 Oct 2017, pp.333-339

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2019-02-12
17:06
MD#2889: 16L2 Event Dynamics and UFO Nature Investigation / Lindstrom, Bjorn Hans Filip (Uppsala University (SE)) ; Apollonio, Andrea (CERN) ; Dziadosz, Martyna (AGH University of Science and Technology (PL)) ; Gorzawski, Arkadiusz (University of Malta (MT)) ; Grob, Laura Katharina ; Holzer, Eva Barbara (CERN) ; Lechner, Anton (CERN) ; Medvedeva, Tatiana (Russian Academy of Sciences (RU)) ; Schmidt, Rudiger (Technische Universitaet Darmstadt (DE)) ; Valette, Matthieu et al.
Micrometer sized particles (UFOs) entering the beam are a known cause of localized beam losses since the beginning of high intensity beam operation, however the origin of these particles is not fully known [...]
CERN-ACC-2019-0032.
- 2019. - 5 p.
Full text

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2019-02-12
13:16
Simulations of RF beam manipulations including intensity effects for CERN PSB and SPS upgrades / Quartullo, Danilo
During Long Shutdown 2 (LS2, 2019-2021) all the injectors of the CERN LHC will undergo several upgrades to fulfill the requests of the LHC Injectors Upgrade (LIU) Project [...]
CERN-THESIS-2019-006 - 179 p.

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