CERN Accelerating science

SPS and CNGS

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2017-05-26
06:40
Radiation Tolerance of Programmable Voltage Supply and High Galvanic Insulation Readout Electronics Used by CERN's LHC Cryogenics / Casas-Cubillos, Juan (CERN) ; Trikoupis, Nikolaos (CERN) ; Mekki, Julien (CERN)
Two new types of electronic cards have been tested in CERN's CHARM irradiation facility. The cards are a complete redesign of a programmable voltage power supply and a revision of a conditioning card used for resistance temperature sensors. [...]
2016 - 7 p. - Published in : IEEE Trans. Nucl. Sci. 63 (2016) 2022-2028

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2017-05-26
06:40
Progress on the HIE-ISOLDE Facility / Kadi, Yacine (CERN) ; Delruelle, Nicolas (CERN) ; Ferreira Somoza, Jose (CERN) ; Garcia Borge, Maria (CERN) ; Gayde, Jean-Christophe (CERN) ; Kautzmann, Guillaume (CERN) ; Martino, Michele (CERN) ; Rodriguez, Jose (CERN) ; Siesling, Erwin (CERN) ; Valdarno, Luca (CERN) et al.
After 20 years of successful ISOLDE operation at the PS-Booster*, a major upgrade of the facility, the HIE-ISOLDE (High Intensity and Energy ISOLDE) project was launched in 2010. It is divided into three parts; a staged upgrade of the REX post-accelerator to increase the beam energy from 3.3 MeV/u to 10 MeV/u using a super-conducting linac, an evaluation of the critical issues associated with an increase in proton-beam intensity and a machine design for an improvement in RIB quality. [...]
2016 - 5 p. - Published in : 10.18429/JACoW-HIAT2015-MOM1I01 Fulltext: PDF;

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2017-05-24
15:58
Thermophysical and mechanical characterization of advanced materials for the LHC collimation system / Bianchi, Laura
The aim of the thesis is to describe the methods employed for the thermo-physical and mechanical characterization and to show the results of the campaign conducted over two ceramic matrix composites, CFC FS140® and MG-6403-Fc, which are candidates as jaws materials in the LHC collimation system [...]
CERN-THESIS-2017-043 - 133 p.

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2017-05-24
15:13
Vol. 39 - Cryogenic Fiber Optic Sensors for Superconducting Magnets and Power Transmission Lines in High Energy Physics Applications / Chiuchiolo, Antonella (University of Sannio) ; Cusano, Andrea (dir.) (University of Sannio) ; Bajko, Marta (dir.) (CERN)
In the framework of the Luminosity upgrade of the Large Hadron Collider (HL - LHC), a remarkable R&D; effort is now ongoing at the European Organization for Nuclear Research (CERN) in order to develop a new generation of accelerator magnets and superconducting power transmission lines. The magnet technology will be based on Nb3Sn enabling to operate in the 11 - 13 T range. [...]
CERN-THESIS-2015-401.- Warsaw, Poland : Warsaw University of Technology Publishing House, 2015 Fulltext: PDF;

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2017-05-24
09:29
THERMOPHYSICAL AND MECHANICAL CHARACTERIZATION OF ADVANCED MATERIALS FOR THE LHC COLLIMATION SYSTEM / Bianchi, Laura (Universita & INFN, Pisa (IT))
The aim of the thesis is to describe the methods employed for the thermo-physical and mechanical characterization and to show the results of the campaign conducted over two ceramic matrix composites, CFC FS140® and MG-6403-Fc, which are candidates as jaws materials in the LHC collimation system. [...]
CERN-ACC-NOTE-2017-0038.
- 2017. - 133 p.

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2017-05-24
06:44
Determination of discharge parameters via OES at the Linac4 H− ion source / Briefi, S (Augsburg U.) ; Fink, D (CERN) ; Mattei, S (CERN) ; Lettry, J (CERN) ; Fantz, U (Augsburg U. ; Garching, Max Planck Inst. Plasmaphys.)
Optical emission spectroscopy (OES) measurements of the atomic Balmer series and the molecular Fulcher transition have been carried out at the Linac4 ion source in order to determine plasma parameters. As the spectroscopic system was only relatively calibrated, the data evaluation only yielded rough estimates of the plasma parameters (Te ≈ 1.2 eV, ne ≈ 1 × 1019 m−3, and n H/nH2 ≈ 0.5 at standard operational parameters). [...]
2016 - Published in : Rev. Sci. Instrum. 87 (2016) 02B104

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2017-05-24
06:44
Numerical study of plasma generation process and internal antenna heat loadings in J-PARC RF negative ion source / Shibata, T (J-PARC) ; Nishida, K (Keio U.) ; Mochizuki, S (Keio U.) ; Mattei, S (CERN) ; Lettry, J (CERN) ; Hatayama, A (Keio U.) ; Ueno, A (J-PARC) ; Oguri, H (J-PARC) ; Ohkoshi, K (J-PARC) ; Ikegami, K (J-PARC) et al.
A numerical model of plasma transport and electromagnetic field in the J-PARC (Japan Proton Accelerator Research Complex) radio frequency ion source has been developed to understand the relation between antenna coil heat loadings and plasma production/transport processes. From the calculation, the local plasma density increase is observed in the region close to the antenna coil. [...]
2016 - 3 p. - Published in : Rev. Sci. Instrum. 87 (2016) 02B128

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2017-05-23
18:14
Higher brightness beams from the SPS for the HL-LHC era / Velotti, Francesco Maria
The need to push the LHC beyond its limits and increase the deliverable luminosity to the experiments by about one order of magnitude has driven the ongoing injector and HL-LHC upgrades [...]
CERN-THESIS-2017-041 - 173 p.

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2017-05-22
07:14
Development and application of a generic CFD toolkit covering the heat flows in combined solid–liquid systems with emphasis on the thermal design of HiLumi superconducting magnets / Bozza, Gennaro (CERN) ; Malecha, Ziemowit M (Wroclaw Tech. U.) ; Van Weelderen, Rob (CERN)
The main objective of this work is to develop a robust multi-region numerical toolkit for the modeling of heat flows in combined solid–liquid systems. Specifically heat transfer in complex cryogenic system geometries involving super-fluid helium. [...]
2016 - 12 p. - Published in : Cryogenics 80 (2016) 253-264

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2017-05-18
10:53
Study of Cryogenic Losses in a Liquid Helium Transfer Line / Magnuson, M
CERN-AT-CR-92-2.
- 1992.
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