CERN Accelerating science

All CERN Accelerators documents

Ultimi arrivi:
2019-07-24
06:03
Simulation of hydrodynamic tunneling induced by high-energy proton beam in copper by coupling computer codes / Nie, Y (CERN) ; Fichera, C (CERN) ; Mettler, L (CERN) ; Carra, F (CERN) ; Schmidt, R (CERN) ; Tahir, N A (Darmstadt, GSI) ; Bertarelli, A (CERN) ; Wollmann, D (CERN)
The design of machine protection systems for high-energy accelerators with high-intensity beams requires analyzing a large number of failures leading to beam loss. One of the most serious failures is an accidental impact of a large number of bunches at one location, for example, due to a deflection of the particle beams by the extraction kicker magnets with the wrong strength. [...]
2019 - 16 p. - Published in : Phys. Rev. Accel. Beams 22 (2019) 014501 Fulltext from Publisher: PDF;

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2019-07-24
06:03
Experiment exposing refractory metals to impacts of 440 GeV$/c$ proton beams for the future design of the CERN antiproton production target: Experiment design and online results / Torregrosa Martin, Claudio (CERN ; Valencia, Polytechnic U.) ; Perillo-Marcone, Antonio (CERN) ; Calviani, Marco (CERN) ; Gentini, Luca (CERN) ; Butcher, Mark (CERN) ; Muñoz-Cobo, José-Luis (Valencia, Polytechnic U.)
The HRMT27-RodTarg experiment employed the HiRadMat facility at CERN to impact intense 440 GeV proton beams onto thin rods 8 mm in diameter, 140 mm in length, and made of high-density materials such as Ir, W, Ta, Mo, and alloys. The purpose of the experiment was to reduce uncertainties on the CERN antiproton target material response and assess the material selection for its future redesign. [...]
2019 - 16 p. - Published in : Phys. Rev. Accel. Beams 22 (2019) 013401 Fulltext from Publisher: PDF;

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2019-07-24
06:03
Radiological clearance of equipment from high-energy electron accelerators: The example of LEP superconducting acceleration system / Duchemin, Charlotte (CERN) ; Magistris, Matteo (CERN) ; Pozzi, Fabio (CERN) ; Silari, Marco (CERN) ; Theis, Chris (CERN) ; Vincke, Helmut (CERN)
The lifespan of a particle accelerator includes its final decommissioning and the disposal of potentially activated materials, one of the major challenges faced at accelerator laboratories. This paper discusses the computational and experimental techniques adopted for clearing from regulatory control the superconducting acceleration system of the former CERN Large Electron Positron collider (LEP), consisting of nearly 450 tons of valuable metals. [...]
2019 - 14 p. - Published in : Nucl. Instrum. Methods Phys. Res., A 919 (2019) 42-55

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2019-07-24
06:03
Beam halo collimation studies and measurements at the Accelerator Test Facility ATF2 / Fuster-Martínez, N (CERN) ; Bambade, P (Orsay, LAL) ; Faus-Golfe, A (Orsay, LAL) ; Kubo, K (KEK, Tsukuba ; Sokendai, Tsukuba) ; Liu, S (DESY) ; Okugi, T (KEK, Tsukuba ; Sokendai, Tsukuba) ; Tauchi, T (KEK, Tsukuba ; Sokendai, Tsukuba) ; Terunuma, N (KEK, Tsukuba ; Sokendai, Tsukuba) ; Wallon, S (Orsay, LAL) ; Yang, R (Orsay, LAL)
A beam halo collimator was installed at the Accelerator Test Facility ATF2 in the spring of 2016. The main objective of the collimator is the reduction of background photons that limit the performance of key diagnostic devices around the Interaction Point, especially the Shintake Monitor, used for measuring the nanometer level vertical beam sizes, and the vertical and horizontal Diamond Sensors, used for transverse beam halo measurements. [...]
2019 - 12 p. - Published in : Nucl. Instrum. Methods Phys. Res., A 917 (2019) 31-42

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2019-07-24
04:13
Simple model for the RF field amplitude dependence of the trapped flux sensitivity in superconducting RF cavities / Calatroni, Sergio (CERN) ; Vaglio, Ruggero (INFN, Naples ; Naples U. ; CNR-SPIN, Naples)
The improvement of the performance of RF superconducting cavities has recently motivated a considerable research effort in order to elucidate the effect of trapped magnetic flux on the surface resistance $R_{s}$. In this paper we show that by introducing a non-linear pinning force in the Gittleman-Rosenblum equations for the RF power dissipation due to a trapped magnetic flux in a superconductor, we can empirically describe the linear dependence on the RF field amplitude $B_{rf0}$ of the additional surface resistance $R_{fl}$. [...]
arXiv:1810.00540.- 2019-02-05 - 7 p. - Published in : Phys. Rev. Accel. Beams: 22 (2019) , pp. 022001 Fulltext: PDF; Fulltext from Publisher: PDF;

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2019-07-24
04:13
Determination of the Bardeen–Cooper–Schrieffer material parameters of the HIE-ISOLDE superconducting resonator / Miyazaki, A. (CERN ; Manchester U.) ; Venturini Delsolaro, W. (CERN)
Superconducting material parameters of the Nb film coatings on the quarter-wave resonator for the HIE-ISOLDE project were studied by fitting experimental results with the Bardeen–Cooper–Schrieffer Mattis–Bardeen (BCS-MB) theory. We pointed out a strong correlation among fitted estimators of material parameters in the BCS-MB theory, and used a procedure to reduce the uncertainty by merging two χ 2 distributions of the surface resistance and effective penetration depth. [...]
arXiv:1806.04443.- 2019-01-03 - 11 p. - Published in : Supercond. Sci. Technol. 32 (2019) 025002 Fulltext: PDF;

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2019-07-23
13:23
Nb3Sn accelerator magnets : designs, technologies and performance / Schoerling, Daniel (ed.) ; Zlobin, Alexander V (ed.)
Cham : Springer, 2019. - 450 p.
Purchase it for me! - CERN library copies
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2019-07-23
06:56
Two-Layer 16 Tesla Cosθ Dipole Design for the FCC / Holik, Eddie Frank (Angelo State U. ; Fermilab) ; Ambrosio, Giorgio (Fermilab) ; Apollinari, Giorgio (Fermilab) /LARP
The Future Circular Collider or FCC is a study aimed at exploring the possibility to reach 100 TeV total collision energy which would require 16 tesla dipoles. Upon the conclusion of the High Luminosity Upgrade, the US LHC Accelerator Upgrade Pro-ject in collaboration with CERN will have extensive Nb3Sn magnet fabrication experience. [...]
FERMILAB-PUB-18-042-TD.- 2018 - 5 p. - Published in : IEEE Trans. Appl. Supercond. 28 (2018) 4006604 Fulltext: PDF; External link: FERMILABPUB

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2019-07-23
04:03
First demonstration of ionization cooling by the Muon Ionization Cooling Experiment / MICE Collaboration
High-brightness muon beams of energy comparable to those produced by state-of-the-art electron, proton and ion accelerators have yet to be realised. [...]
arXiv:1907.08562 ; RAL-P-2019-003.
- 19 p.
Fulltext

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2019-07-19
14:24
Génération de fontions analogiques du temps par ordinateur / Bosser, Jacques
CERN-MPS-CO-71-4.
- 1971. - 152 p.
Full text

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