CERN Accelerating science

All CERN Accelerators documents

Announcement
This new collection aggregates CERN accelerator-related documents on CDS. It will continuously be enriched and improved in the near future.
Latest additions:
2020-02-26
07:41
Noninvasive bunch length measurements exploiting Cherenkov diffraction radiation / Curcio, A (CERN) ; Bergamaschi, M (CERN) ; Corsini, R (CERN) ; Farabolini, W (CERN) ; Gamba, D (CERN) ; Garolfi, L (CERN) ; Kieffer, R (CERN) ; Lefevre, T (CERN) ; Mazzoni, S (CERN) ; Fedorov, K (JAI, UK ; Tomsk Polytechnic U.) et al.
We present the observation and the detailed investigation of coherent Cherenkov diffraction radiation (CChDR) in terms of spectral-angular characteristics. Electromagnetic simulations have been performed to optimize the design of a prismatic dielectric radiator and the performance of a detection system with the aim of providing longitudinal beam diagnostics. [...]
2020 - 13 p. - Published in : Phys. Rev. Accel. Beams 23 (2020) 022802 Fulltext: PDF;

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2020-02-26
07:41
Optics interlock system for the CERN LHC: Implementation and operational experience / Schaumann, M (CERN) ; Calia, A (CERN) ; Fuchsberger, K (CERN) ; Galilée, M A (CERN) ; Hemelsoet, G H (CERN) ; Hostettler, M (CERN) ; Jacquet, D (CERN) ; Makai, J (CERN) ; Wenninger, J (CERN)
In 2016 the luminosity reach of the Large Hadron Collider (LHC) was increased by reducing the β-function in the main collision points below the design value to β*=40  cm. This was possible thanks to a specially matched betatron phase advance between the extraction kickers and some sensitive machine elements that would otherwise risk to be damaged by miskicked beam in case of an asynchronous beam dump. [...]
2020 - 12 p. - Published in : Phys. Rev. Accel. Beams 23 (2020) 022801 Fulltext: PDF;

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2020-02-25
06:57
Lead evaporation instabilities and failure mechanisms of the micro oven at the GTS-LHC ECR ion source at CERN / Kövener, T (CERN ; U. Hamburg (main)) ; Küchler, D (CERN) ; Toivanen, V A (Jyvaskyla U.)
The GTS-LHC ECR ion source (named after the Grenoble Test Source and the Large Hadron Collider) at CERN provides heavy ion beams for the chain of accelerators from Linac3 up to the LHC for high energy collision experiments and to the Super Proton Synchrotron for fixed target experiments. During the standard operation, the oven technique is used to evaporate lead into the source plasma to produce multiple charged lead ion beams. [...]
2020 - 5 p. - Published in : Rev. Sci. Instrum. 91 (2020) 013320

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2020-02-25
06:56
Experimental Characterization of an Overdense Plasma in a Compact ion Source / Castro, Giuseppe (INFN, LNS) ; Mascali, David (INFN, LNS) ; Romano, Francesco Paolo (INFN, LNS) ; Altana, Carmen (INFN, LNS) ; Caliri, Claudia (INFN, LNS) ; Celona, Luigi (INFN, LNS) ; Giugno, Rossella Di (INFN, LNS) ; Gambino, Nadia (INFN, Catania) ; Lanaia, Davide (CERN) ; Miracoli, Rosalba (ESS Bilbao) et al.
Electron Cyclotron Resonance Ion Sources (ECRIS) are compact plasma-based machines able to feed particle accelerators with high intensity beams of multi-charged ions. ECRIS plasmas are density-limited, since they are sustained by E.M. [...]
Czech Technical University in Prague, 2015 - 4 p. - Published in : Acta Polytech. 55 (2015) 146-149 Fulltext: PDF;

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2020-02-25
06:56
High energy muon induced radioactive nuclides in nickel plate and its use for 2-D muon-beam image profile / Kurebayashi, Y (Yamagata U.) ; Sakurai, H (Yamagata U.) ; Takahashi, Y (Yamagata U.) ; Doshita, N (Yamagata U.) ; Kikuchi, S (Yamagata U.) ; Tokanai, F (Yamagata U.) ; Horiuchi, K (Hirosaki U.) ; Tajima, Y (Yamagata U.) ; Oe, T (Yamagata U.) ; Sato, T (Yamagata U.) et al.
Target materials were exposed to a muon beam with an energy of 160 GeV/c at the COMPASS experiment line in CERN-SPS to measure the production cross-sections for muon-induced radionuclides. A muon imager containing four nickel plates, each measuring 100 mm×100 mm, exposed to the IP plate successfully detected the muon beam image during an irradiation period of 33 days. [...]
ScienceDirect, 2015 - 5 p. - Published in : Nucl. Instrum. Methods Phys. Res., A 799 (2015) 54-58

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2020-02-25
04:08
Radiation Damage Studies on Titanium Alloys as High Intensity Proton Accelerator Beam Window Materials / RaDIATE Collaboration
A high-strength dual alpha+beta phase titanium alloy Ti-6Al-4V is utilized as a material for beam windows in several accelerator target facilities. However, relatively little is known about how material properties of this alloy are affected by high-intensity proton beam irradiation. [...]
arXiv:1911.10198.- 2020 - 10 p. - Published in : JPS Conf. Proc. 28 (2020) 041001 Fulltext: PDF;
In : 14th International Workshop on Spallation Materials Technology, Fukushima, Japan, 11 - 17 Nov 2018, pp.041001

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2020-02-24
11:25
Design of a novel linear accelerator for carbon ion therapy / Bencini, Vittorio (Sapienza Universita e INFN, Roma I (IT))
Hadron therapy has been first proposed in 1946 by Robert Wilson as an advanced form of radiotherapy. Hadrons, such as protons and light ions, release the largest part of their energy in a narrow space range, called Bragg peak, allowing to target the tumor cells more precisely than photon beams [...]
CERN-THESIS-2019-301.- 126 p. Fulltext: PDF; External link: Approve this document (restricted)

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2020-02-22
07:03
Analysis of 440 GeV proton beam–matter interaction experiments at the High Radiation Materials test facility at CERN / Burkart, F (Frankfurt U. ; CERN) ; Schmidt, R (CERN) ; Raginel, V (CERN) ; Wollmann, D (CERN) ; Tahir, N A (Darmstadt, GSI) ; Shutov, A (IPCP, Chernogolovka) ; Piriz, A R (Castilla-La Mancha U.)
In a previous paper [Schmidt et al., Phys. Plasmas 21, 080701 (2014)], we presented the first results on beam–matter interaction experiments that were carried out at the High Radiation Materials test facility at CERN. [...]
AIP, 2015 - 9 p. - Published in : J. Appl. Phys. 118 (2015) 055902

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2020-02-22
07:03
Transformer ratio saturation in a beam-driven wakefield accelerator / Farmer, J P (Heinrich Heine U., Dusseldorf) ; Martorelli, R (Heinrich Heine U., Dusseldorf) ; Pukhov, A (Heinrich Heine U., Dusseldorf)
We show that for beam-driven wakefield acceleration, the linearly ramped, equally spaced train of bunches typically considered to optimise the transformer ratio only works for flat-top bunches. Through theory and simulation, we explain that this behaviour is due to the unique properties of the plasma response to a flat-top density profile. [...]
AIP, 2015 - 6 p. - Published in : Phys. Plasmas 22 (2015) 123113

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2020-02-22
07:03
Calibration of Fourier domain short coherence interferometer for absolute distance measurements / Montonen, R (Helsinki Inst. of Phys. ; Helsinki U.) ; Kassamakov, I (Helsinki Inst. of Phys. ; Helsinki U.) ; Hæggström, E (Helsinki U.) ; Österberg, K (Helsinki Inst. of Phys. ; Helsinki U.)
We calibrated and determined the measurement uncertainty of a custom-made Fourier domain short coherence interferometer operated in laboratory conditions. We compared the optical thickness of two thickness standards and three coverslips determined with our interferometer to the geometric thickness determined by SEM. [...]
OSA, 2015 - 5 p. - Published in : Appl. Opt. 54 (2015) 4635

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