# All CERN Accelerators documents

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

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;

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

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;

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)

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

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

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

2020-02-21
09:30
 A Proposal for an Automatic Longitudinal Tomography Demonstration Project in the Proton Synchrotron Booster / Albright, Simon (CERN) Longitudinal phase space tomography is a vital tool for beam diagnostics in most of the CERN synchrotrons, it is used to reconstruct the longitudinal phase space, and to measure the longitudinal emittance and energy spread. [...] CERN-ACC-NOTE-2020-0014. - 2020. - 12 p. Full text

2020-02-20
18:15
 Measurement of $D^0-\overline{D^0}$ mixing parameters and search for $CP$ violation in $D^0 \rightarrow K^+ \pi^-$ decays with LHCb Run 2 data / Ribatti, Roberto (Universita & INFN Pisa (IT)) $D^0-\overline{D^0}$ mixing parameters are measured in the decay-time-dependent ratio of $D^0 \rightarrow K^+ \pi^-$ to $D^0 \rightarrow K^- \pi^+$ rates. The analysis uses a data sample of proton-proton collisions corresponding to an integrated luminosity of $5.9\,\text{fb}^{-1}$ collected by LHCb experiment from 2015 to 2018 at the center-of-mass energy of $13$ TeV. [...] CERN-THESIS-2019-298.- Fulltext: PDF; External link: Approve this document (restricted)