CERN Accelerating science

All CERN Accelerators documents

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2017-11-18
06:51
Thermal conductivity measurements of impregnated Nb3Sn coil samples in the temperature range of 3.5 K to 100 K / Koettig, T (CERN) ; Maciocha, W (CERN) ; Bermudez, S (CERN) ; Rysti, J (CERN) ; Tavares, S (CERN) ; Cacherat, F (CERN) ; Bremer, J (CERN)
In the framework of the luminosity upgrade of the LHC, high-field magnets are under development. Magnetic flux densities of up to 13 T require the use of Nb3Sn superconducting coils. [...]
2017 - Published in : IOP Conf. Ser. Mater. Sci. Eng. 171 (2017) 012103 Fulltext: PDF;

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2017-11-18
06:51
Cryogenic system configuration for the International Linear Collider (ILC) at mountainous site / Nakai, H (KEK, Tsukuba) ; Okamura, T (KEK, Tsukuba) ; Delikaris, D (CERN) ; Peterson, T (Fermilab) ; Yamamoto, A (KEK, Tsukuba)
The International Linear Collider (ILC) plans to make use of ten cryoplants for its main linacs, each providing 19 kW at 4.5 K equivalent and among of it 3.6 kW at 2 K. Each cryoplant will consist of various cryogenic components such as a 4.5 K refrigerator cold box, a 2 K refrigerator cold box, and helium compressors and so on. [...]
2017 - Published in : IOP Conf. Ser. Mater. Sci. Eng. 171 (2017) 012036 Fulltext: PDF;

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2017-11-18
06:51
Design and optimisation of low heat load liquid helium cryostat to house cryogenic current comparator in antiproton decelerator at CERN / Lees, A (CERN) ; Koettig, T (CERN) ; Fernandes, M (CERN) ; Tan, J (CERN)
The Cryogenic Current Comparator (CCC) is installed in the low-energy Antiproton Decelerator (AD) at CERN to make an absolute measurement of the beam intensity. Operating below 4.2 K, it is based on a superconducting quantum interference device (SQUID) and employs a superconducting niobium shield to supress magnetic field components not linked to the beam current. [...]
2017 - Published in : IOP Conf. Ser. Mater. Sci. Eng. 171 (2017) 012033 Fulltext: PDF;

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2017-11-18
06:51
Investigation and performance assessment of hydraulic schemes for the beam screen cooling for the Future Circular Collider of hadron beams / Kotnig, Claudio (CERN ; Graz, Tech. U.) ; Tavian, L (CERN) ; Brenn, G (Graz, Tech. U.)
The international study at CERN of a possible future circular collider (FCC) considers an option for a very high energy hadron-hadron collider located in a quasi-circular underground tunnel of about 100 km of length. The technical segmentation of the collider foresees continuously cooled sections of up to 10.4 km; throughout the entire section length, more than 600 kW of heat mainly generated by the beam synchrotron radiation must be removed from the beam screen circuits at a mean temperature of 50 K. [...]
2017 - Published in : IOP Conf. Ser. Mater. Sci. Eng. 171 (2017) 012006 Fulltext: PDF;

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2017-11-18
06:51
Field Quality Measurements in the FNAL Twin-Aperture 11 T Dipole for LHC Upgrades / Strauss, T (Fermilab) ; Apollinari, G (Fermilab) ; Barzi, E (Fermilab) ; Chlachidze, G (Fermilab) ; Di Marco, J (Fermilab) ; Nobrega, F (Fermilab) ; Novitski, I (Fermilab) ; Stoynev, S (Fermilab) ; Turrioni, D (Fermilab) ; Velev, G (Fermilab) et al.
FNAL and CERN are developing an 11 T Nb3Sn dipole suitable for installation in the LHC to provide room for additional collimators. Two 1 m long collared coils previously tested at FNAL in single-aperture dipole configuration were assembled into the twin-aperture configuration and tested including magnet quench performance and field quality. [...]
FERMILAB-CONF-16-520-TD; NAPAC-2016-MOPOB41.- 2017 - 4 p. - Published in : 10.18429/JACoW-NAPAC2016-MOPOB41 Fulltext: PDF; External links: FERMILABCONF; JACoW

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2017-11-18
06:51
First Test Results of the 150 mm Aperture IR Quadrupole Models for the High Luminosity LHC / Ambrosio, G (Fermilab) ; Chlachidze, G (Fermilab) ; Wanderer, P (Brookhaven) ; Ferracin, P (CERN) ; Sabbi, G (LBNL, Berkeley) /LARP
The High Luminosity upgrade of the LHC at CERN will use large aperture (150 mm) quadrupole magnets to focus the beams at the interaction points. The high field in the coils requires Nb3Sn superconductor technology, which has been brought to maturity by the LHC Accelerator Re-search Program (LARP) over the last 10 years. [...]
FERMILAB-CONF-16-440-TD.- 2017 - 6 p. - Published in : 10.18429/JACoW-NAPAC2016-WEB3IO02 Fulltext: PDF; External link: FERMILABCONF

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2017-11-17
09:19
Considerations on a Partial Energy Upgrade of the LHC / Fartoukh, Stephane (CERN) ; Giovannozzi, Massimo (CERN) ; Missiaen, Dominique (CERN) ; Todesco, Ezio (CERN) ; Zimmermann, Frank (CERN)
In the frame of the HL-LHC project, a few accelerator dipole and quadrupole magnets of higher critical field and/or larger aperture are being produced. The new inner triplet quadrupoles and dispersion-suppressor dipoles are made from Nb3Sn superconductor, which supports a higher field than the classical Nb-Ti magnets used for the LHC. [...]
ARIES-2017-001; CERN-ACC-2017-096.- Geneva : CERN, 2017 Fulltext: PDF;

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2017-11-17
08:18
RF Measurements of the New TOTEM Roman Pot / Berrig, O. (CERN) ; Biancacci, N. (CERN) ; Caspers, F. (CERN) ; Danisi, A. (CERN) ; Eberhardt, J. (CERN) ; Kuczerowski, J. (CERN) ; Minafra, Nicola (CERN) ; Salvant, B. (CERN) ; Vollinger, C. (CERN)
The TOTEM experiment has been designed to measure the total proton-proton cross section and to study the elastic and diffractive scattering at the LHC energy. [...]
arXiv:1612.02200.
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Preprint

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2017-11-16
07:23
Upgraded polarized target for polarized Drell-Yan measurement at COMPASS / Pešek, Michael (Charles U. ; Turin U.) /COMPASS
The first ever polarized Drell-Yan measurement, presently being done by the COMPASS collaboration at CERN is described. Emphasis is put on the polarized target and its upgrade..
2016 - 4 p. - Published in : J. Phys. : Conf. Ser. 678 (2016) 012005 Fulltext: PDF;
In : 16th Workshop on High Energy Spin Physics, Dubna, Russia, 08 - 12 Sep 2015, pp.012005

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2017-11-15
13:49
Stability of coherent synchrotron motion : Part 1 / Gumowski, I
CERN-SI-Int-DL-70-13.
- 1970. - 42 p.
Full text

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