CERN Accelerating science

All CERN Accelerators documents

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2018-05-16
06:13
Towards REBCO 20T+ dipoles for accelerators / van Nugteren, Jeroen (CERN) ; Kirby, Glyn (CERN) ; Murtomäki, Jaakko (CERN) ; DeRijk, Gijs (CERN) ; Rossi, Lucio (CERN) ; Stenvall, Antti (Tampere U. of Tech.)
ReBCO high temperature superconducting (HTS) coated conductor tapes are a promising candidate for pushing the magnetic fields in accelerator magnets well beyond 20 T. They are capable of very high current densities in intense applied magnetic field, have a very high thermal stability, can withstand high transverse pressures and allow operation in 20–30 K helium gas flow, potentially reducing operating cost significantly. [...]
2018 - 9 p. - Published in : IEEE Trans. Appl. Supercond. 28 (2018) 4008509
In : 13th European Conference on Applied Superconductivity, ICCG, Geneva, Switzerland, 17 - 21 Sep 2017, pp.4008509

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2018-05-16
06:13
Measurement and Analysis of the Dynamic Effects in an HTS Dipole Magnet / Petrone, Carlo (CERN) ; van Nugteren, Jeroen (CERN) ; Bajas, Hugues (CERN) ; Bottura, Luca (CERN) ; Kirby, Glyn (CERN) ; Rossi, Lucio (CERN) ; Russenschuck, Stephan (CERN)
The EuCARD-2 project, co-funded by the European Commission, supports the design, production and standalone cold testing of a high-temperature, superconducting demonstrator insert-magnet. The so-called Feather-M2 dipole magnet was built at CERN, using Roebel cable consisting of REBCO coated conductor tapes. [...]
2018 - 4 p. - Published in : IEEE Trans. Appl. Supercond. 28 (2018) 4604404
In : 13th European Conference on Applied Superconductivity, ICCG, Geneva, Switzerland, 17 - 21 Sep 2017, pp.4604404

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2018-05-16
06:13
A conceptual solution for a beam halo collimation system for the Future Circular hadron–hadron Collider (FCC-hh) / Fiascaris, M (CERN) ; Bruce, R (CERN) ; Redaelli, S (CERN)
We present the first conceptual solution for a collimation system for the hadron–hadron option of the Future Circular Collider (FCC-hh). The collimation layout is based on the scaling of the present Large Hadron Collider collimation system to the FCC-hh energy and it includes betatron and momentum cleaning, as well as dump protection collimators and collimators in the experimental insertions for protection of the final focus triplet magnets. [...]
2018 - 11 p. - Published in : Nucl. Instrum. Methods Phys. Res., A 894 (2018) 96-106 Fulltext: PDF;

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2018-05-16
06:13
CERN Intersecting Storage Rings (ISR) / Johnsen, Kjell (CERN)
It has been realized for many years that it would be possible to obtain a glimpse into a much higher energy region for elementary-particle research if particle beams could be persuaded to collide head-on..
1973 - 8 p. - Published in : Proc. Natl. Acad. Sci. U. S. A.: 70 (1973) , pp. 619-626 Fulltext: PDF; External link: PNAS

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2018-05-15
14:18
Design of LEIR Transfer Lines / Carli, Ch ; Chanel, M ; Hemery, J-Y
The LEIR transfer lines are designed to transport the ion beam from the Linac 3 to LEIR and, after accumulation and acceleration from LEIR to the PS. [...]
PIL-LEIR-Note-011 ; CERN-PS-AE-NOTE-2002-218.
- 2002. - 12 p.
Full text

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2018-05-15
07:32
Luminosity Scans for Beam Diagnostics / Hostettler, Michael (Bern U. ; CERN) ; Fuchsberger, Kajetan (CERN) ; Papotti, Giulia (CERN) ; Pieloni, Tatiana (IPT, Lausanne) ; Papaphilippou, Yannis (CERN)
A new type of fast luminosity separation scans ("Emittance Scans") was introduced at the CERN Large Hadron Collider (LHC) in 2015. [...]
arXiv:1804.10099.
- 10 p.
Preprint

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2018-05-15
06:02
ISOLDE: Targeting a New Era in Nuclear Physics / Ravn, Helge (CERN)
2017 - 4 p. - Published in : Adv. Ser. Direct. High Energy Phys.: 27 (2017) , pp. 77-80 Fulltext: PDF;

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2018-05-12
07:17
Amplitude enhancement of the self-modulated plasma wakefields / Li, Y. (Manchester U. ; Cockcroft Inst. Accel. Sci. Tech.) ; Xia, G. (Manchester U. ; Cockcroft Inst. Accel. Sci. Tech.) ; Lotov, K.V. (Novosibirsk, IYF ; Novosibirsk State U.) ; Sosedkin, A.P. (Novosibirsk, IYF ; Novosibirsk State U.) ; Zhao, Y. (Manchester U.) ; Gessner, S.J. (CERN)
Seeded Self-modulation (SSM) has been demonstrated to transform a long proton bunch into many equidistant micro-bunches (e.g., the AWAKE case), which then resonantly excite strong wakefields. However, the wakefields in a uniform plasma suffer from a quick amplitude drop after reaching the peak. [...]
arXiv:1805.03272.- 2018-05-08 - 5 p. - Published in : , pp. TUPML023 Fulltext: PDF;
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018

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2018-05-12
06:31
First experience with carbon stripping foils for the 160 MeV H− injection into the CERN PSB / Weterings, Wim (CERN) ; Bracco, Chiara (CERN) ; Jorat, Louise (CERN) ; Noulibos, Remy (CERN) ; van Trappen, Pieter (CERN)
160 MeV H− beam will be delivered from the new CERN linear accelerator (Linac4) to the Proton Synchrotron Booster (PSB), using a H− charge-exchange injection system. A 200 µg/cm2 carbon stripping foil will convert H− into protons by stripping off the electrons. [...]
2018 - Published in : AIP Conf. Proc. 1962 (2018) 030003 Preprint: PDF;
In : 28th World Conference of the International Nuclear Target Development Society, Cape Town, South Africa, 13 - 18 Nov 2016, pp.030003

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2018-05-10
07:05
Sensitivity of the LHC Transverse Feedback System to Intra-Bunch Motion / Kotzian, G (CERN) ; Höfle, W (CERN) ; Valuch, D (CERN)
The LHC Transverse Feedback System is designed to damp and counteract all possible coupled bunch modes between the lowest betatron frequency and 20 MHz. The present study reveals that the analog frontend processing scheme based on down converting the pick-up signal at the LHC RF frequency to baseband considerably extends the detected bunch movements visible to the feedback system to beyond 1 GHz. [...]
IPAC-2017-TUPIK093.- 2017 - 4 p. - Published in : 10.18429/JACoW-IPAC2017-TUPIK093 Fulltext: PDF; External link: Fulltext
In : 8th International Particle Accelerator Conference, Copenhagen, Denmark, 14 - 19 May 2017, pp.TUPIK093

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