CERN Accelerating science

SPS and CNGS

Letzte Einträge:
2022-01-19
09:09
Polarized target at COMPASS / Doshita, Norihiro (Yamagata U.) ; Iwata, Takahiro (Yamagata U.) ; Kondo, Kaori (Yamagata U.) ; Miyachi, Yoshiyuki (Yamagata U.) ; Nukazuka, Genki (Yamagata U.) ; Reicherz, Gerhard (Ruhr U., Bochum) ; Meyer, Werner (Ruhr U., Bochum) ; Finger, Miroslav (Charles U.) ; Pesek, Michael (Charles U.) ; Horikawa, Naoaki (Chubu U.) et al.
The transversely polarized solid proton target was used in 2015 and 2018 for the polarized Drell- Yan experiment at the first in the world with a 10$^8$ /s intensity of 190 GeV pion beam at COM- PASS. Because of the radiation damage, the deterioration of the proton relaxation time of NH$_3$ was observed over more than 6 months data taking period. [...]
SISSA, 2020 - 6 p. - Published in : PoS PSTP2019 (2020) 049 Fulltext: PDF;
In : 18th International Workshop on Polarized Sources, Targets, and Polarimetry (PSTP 2019), Knoxville, United States, 23 - 27 Sep 2019, pp.049

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2022-01-18
14:33
Recommissioning of the CERN AD Stochastic Cooling System in 2021 after Long Shutdown 2 / Hofle, Wolfgang (CERN) ; Oliveira, Joao Carlos (CERN) ; Carli, Christian (CERN) ; Caspers, Fritz (European Scientific Institute (FR)) ; Dupuy, Bruno (CERN) ; Gamba, Davide (CERN) ; Louwerse, Reinier (CERN) ; Ponce, Laurette (CERN) ; Myklebust, Vebjorn Roed ; Rey, Stephane Franck (CERN) et al.
The power system of the Stochastic Cooling System of the anti-proton decelerator AD at CERN, installed on top of the shielding blocks of the AD ring, was completely dismantled during the long shutdown 2 (LS2) at the end of the 2018 run in order to gain access to the accelerator for magnet consolidation. [...]
CERN-ACC-NOTE-2022-0003 ; ISBN: 978-3-95450-243-1 ; ISSN: 2226-0374 ; doi: 10.18429/JACoW-COOL2021-S302.
- 2022. - 6 p.
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2022-01-12
12:21
How the distance of the cavern walls affects the background rates / Ferro-Luzzi, Massimiliano (CERN) /SHiP Collaboration
to be added
CERN-SHiP-INT-2022-001.- Geneva : CERN, 2022

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2022-01-12
06:18
First “Skin Depth” estimations using GEANT4 and FLUKA based simulations for CERN secondary beamlines / D'Alessandro, Gian Luigi (CERN ; Royal Holloway, U. of London) ; Banerjee, Dipanwita (CERN) ; Gatignon, Lau (CERN) ; Bernhard, Johannes (CERN) ; Gerbershagen, Alexander (CERN) ; van Dijk, Maarten (CERN ; Ecole Polytechnique, Lausanne) ; Gibson, Stephen (Royal Holloway, U. of London)
In order to have highly flexible secondary beamlines collimation is crucial. Collimators are blocks of material placed along the beamline that let the main beam pass within the collimator aperture limits, while most of the particles beyond it interact in the material and gets absorbed or loses enough energy to be deflected away from the beam core by the magnets placed downstream. [...]
2022 - 7 p. - Published in : Nucl. Instrum. Methods Phys. Res., B 512 (2022) 76-82 Fulltext: PDF;

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2022-01-12
04:13
High intensity proton beam impact at 440 GeV/c on Mo and Cu coated CfC/graphite and SiC/SiC absorbers for beam intercepting devices / Maestre, Jorge (CERN ; Granada U.) ; Bahamonde, Cristina (CERN) ; Garcia, Inigo Lamas (CERN) ; Kershaw, Keith (CERN) ; Biancacci, Nicolo (CERN) ; Busom, Josep (CERN) ; Frankl, Matthias (CERN ; PSI, Villigen) ; Lechner, Anton (CERN) ; Kurtulus, Adnan (CERN) ; Makimura, Shunsuke (J-PARC ; KEK, Tsukuba) et al.
Beam Intercepting Devices (BIDs) are essential protection elements for the operation of the Large Hadron Collider (LHC) complex. The LHC internal beam dump (LHC Target Dump Injection or LHC TDI) is the main protection BID of the LHC injection system; its main function is to protect LHC equipment in the event of a malfunction of the injection kicker magnets during beam transfer from the SPS to the LHC. [...]
arXiv:2112.04792.- 2022-01-14 - 34 p. - Published in : JINST 17 (2022) P01019 Fulltext: document - PDF; 2112.04792 - PDF;

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2022-01-05
14:23
Numerical noise due to binning in macroparticle simulations / Lasheen, Alexandre (CERN)
Numerical noise is an important parameter to minimize to ensure convergence of the macroparticle simulation results. [...]
CERN-ACC-NOTE-2022-0002.
- 2021. - 15 p.

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2022-01-05
12:30
Energy Matching Between Linac4 and the PSB / Albright, Simon (CERN) ; Antoniou, Fanouria (CERN) ; Asvesta, Foteini (CERN) ; Skowronski, Piotr Krzysztof (CERN)
Until 2018, before Long Shutdown 2, injection to the PSB was done with a coasting proton beam from Linac2, which was then captured by the RF system. [...]
CERN-ACC-NOTE-2022-0001.
- 2022. - 7 p.
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2021-12-15
10:45
Proof-of-principle of the ultra-narrowband detection scheme at 30 GHz toward weakly interacting slim particle search / Miyazaki, Akira (Uppsala University (SE)) ; Caspers, Fritz (European Scientific Institute (FR)) ; Steinmann, J L (Karlsruhe Institute of Technology) ; Ruess, Tobias (Karlsruhe Institute of Technology) ; Jelonnek, John (Karlsruhe Institute of Technology)
A coherent detection scheme was tested for dark photons and axion search with millimeter waves [...]
CERN-ACC-NOTE-2021-0032.
- 2021.
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2021-12-14
06:22
Chapter 4: Beamline – main components / Carlsen, B (CERN) ; Carvalho, F (CERN) ; De Jesus, V (CERN) ; De La Gama, J (CERN) ; Ebn Rahmoun, A (CERN) ; Froeschl, Robert (CERN) ; Gourber-Pace, Marine (CERN) ; Grenier-Boley, Edouard (CERN) ; Lopez, R (CERN) ; Mompo, Richard (CERN) et al.
The East Area renovation will cover the refurbishment of the East Hall with its beamlines and infrastructures. A re-design of the beamlines is included to improve the magnet situation, the radiation situation, and maintainability in general. [...]
2021 - 45 p. Fulltext: PDF;
In : CERN Proton Synchrotron East Area Facility, pp.43-87

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2021-12-14
06:22
Chapter 3: Design of the East Area facility after renovation / Bernhard, Johannes Benedikt (CERN) ; Dogru, G (CERN) ; Evrard, S (CERN) ; Froeschl, Robert (CERN) ; Harrouch, E (CERN) ; Lazzaroni, M (CERN)
The PS primary proton beam is slowly extracted at 24 GeV/c towards the East Area with the help of the third- order resonance technique over a typical spill length of 350 to 450 ns within 2.4 s cycles. The number of East Area extractions is usually around five to six per overall PS super-cycle of typically 40 s and depends on both users and schedule constraints, respectively. [...]
2021 - 26 p. Fulltext: PDF;
In : CERN Proton Synchrotron East Area Facility, pp.17-42

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