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Electrostatic dust lofting: a possible cause for beam losses at CERN’s LHC
/ Elliott, A (Florida Inst. Tech.) ; Wang, X (U. Colorado, Boulder) ; Horanyi, M (U. Colorado, Boulder) ; Taylor, K (U. Colorado, Boulder) ; Schmidt, R (Darmstadt, Tech. Hochsch.) ; Wiesner, C (CERN) ; Wollmann, D (CERN) ; Belanger, P (TRIUMF)
Dust particles interacting with the proton beams have caused many thousand beam-loss events at CERN's Large Hadron Collider (LHC), some of which led to premature beam dumps and even magnet quenches. It has been hypothesized that dust particles on the vacuum chamber wall of the LHC are negatively charged due to electron clouds and can detach from the chamber wall by the electric field of the beam. [...]
2023 - 4 p.
- Published in : JACoW IPAC 2023 (2023) MOPA065
Fulltext: PDF;
In : 14th International Particle Accelerator Conference (IPAC 2023), Venice, Italy, 7 - 12 May 2023, pp.MOPA065
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Photoelectric charging and lofting of dust particles on a conducting surface with external electric fields
/ Taylor, Kelyan (U. Colorado, Boulder) ; Elliott, Amanda (Rochester U.) ; Wang, Xu (U. Colorado, Boulder) ; Horanyi, Mihaly (U. Colorado, Boulder) ; Schmidt, Rudiger (Darmstadt, Tech. U.) ; Wollmann, Daniel (CERN) ; Wiesner, Christoph (CERN) ; Belanger, Philippe (TRIUMF)
We present a laboratory study of photoelectric charging of dust particles and their lofting on a conducting surface in the presence of external electric fields. Insulating particles with diameter <45 μm are dispersed on a conducting surface exposed to ultraviolet (UV) light. [...]
2024 - 6 p.
- Published in : Phys. Plasmas 31 (2024) 073703
Fulltext: PDF;
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Workshop on Dust Charging and Beam-Dust Interaction in Particle Accelerators
/ Blaszkiewicz, Milosz Robert (CERN) ; Felsberger, Lukas (CERN) ; Hernalsteens, Cedric (CERN) ; Heron, Jack (CERN) ; Obermair, Christoph (Graz University of Technology (AT)) ; Rosaz, Guillaume Jonathan (CERN) ; Schmidt, Rudiger (GSI - Helmholtzzentrum fur Schwerionenforschung GmbH (DE)) ; Uythoven, Jan (CERN) ; Wiesner, Christoph (CERN) ; Wollmann, Daniel (CERN) et al.
The effects of beam-dust interactions have been observed in particle accelerators and have been studied as early as the 1960s. [...]
CERN-ACC-NOTE-2023-0025.
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2023.
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System Relation Management and Status Tracking for CERN Accelerator Systems
/ Garnier, J C (CERN) ; Audrain, M (CERN) ; Csikos, D (CERN) ; Fuchsberger, K (CERN) ; Gorzawski, A A (CERN) ; Horanyi, G (CERN) ; Suchowski, J (CERN) ; Turcu, P C (CERN) ; Zerlauth, M (CERN)
The Large Hadron Collider (LHC) at CERN requires many systems to work together closely to allow reliable operation and at the same time ensure that the required protection systems function correctly when operating with the large energies stored in the magnet system and particle beams..
2014
External link: Published version from JaCoW
In : 14th International Conference on Accelerator & Large Experimental Physics Control Systems, San Francisco, CA, USA, 6 - 11 Oct 2013, pp.tuppc030
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The Forward TPC system of the NA61/SHINE experiment at CERN: a tandem TPC concept
/ Rumberger, Brant (U. Colorado, Boulder) ; Aduszkiewicz, Antoni (Warsaw U.) ; Boissevain, Jan (U. Colorado, Boulder) ; Kuich, Magdalena (Warsaw U.) ; László, András (Wigner RCP, Budapest) ; Nagai, Yoshikazu (U. Colorado, Boulder) ; Oláh, László (Wigner RCP, Budapest) ; Podlaski, Piotr (Warsaw U.) ; Varga, Dezső (Wigner RCP, Budapest) ; Wensveen, Martin (CERN) et al.
This paper presents the Forward Time Projection Chamber (FTPC) system of the NA61/SHINE experiment at the CERN SPS accelerator. This TPC system applies a novel tandem-TPC design to reduce the background originating from particle tracks not synchronous with the event trigger. [...]
arXiv:2004.11358.-
2020-07-17 - 14 p.
- Published in : JINST 15 (2020) P07013
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Design of a Very Low Energy Beamline for NA61/SHINE
/ Mussolini, Carlo Alberto (CERN ; JAI, UK) ; Burrows, Philip N (JAI, UK) ; Charitonidis, Nikolaos (CERN) ; Nagai, Yoshikazu (U. Colorado, Boulder) ; Zimmerman, Eric D (U. Colorado, Boulder)
A new, low-energy beamline branch is currently under consideration for the H₂ beamline at the CERN North Area. This new branch would extend the capabilities of the current infrastructure enabling the study of particles in the very low, 1-13 GeV/c, momentum range. [...]
Geneva : JACoW, 2021 - 4 p.
- Published in : JACoW IPAC 2021 (2021) 4017-4020
Fulltext: PDF;
In : 12th International Particle Accelerator Conference (IPAC 2021), Online, 24 - 28 May 2021, pp.4017-4020
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Design of a Very Low Energy Beamline for NA61/SHINE
/ Mussolini, Carlo Alberto (CERN ; JAI, UK ; Oxford U.) ; Burrows, Philip (JAI, UK ; Oxford U.) ; Charitonidis, Nikolaos (CERN) ; Nagai, Yoshikazu (Eotvos U.) ; Zimmerman, Eric (U. Colorado, Boulder)
A new, low-energy branch is being designed for the H₂ beamline at the CERN North Experimental Area. This new low-energy branch would extend the capabilities of the current infrastructure enabling the study of particles in the low, 1 - 13 GeV/c, momentum range. [...]
2022 - 4 p.
- Published in : JACoW IPAC 2022 (2022) 1741-1744
Fulltext: PDF;
In : 13th International Particle Accelerator Conference (IPAC 2022), Bangkok, Thailand, 12 - 17 Jun 2022, pp.1741-1744
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Cherenkov Diffraction Radiation From Long Dielectric Material: An Intense Source of Photons in the NIR-THz Range
/ Lefèvre, Thibaut (CERN) ; Bergamaschi, Michele (CERN) ; Billing, Michael (Cornell U., CLASSE) ; Bobb, Lorraine (Garsington, Oxfordshire) ; Conway, Joseph (Cornell U., CLASSE) ; Jones, Owain Rhodri (CERN) ; Karataev, Pavel (Royal Holloway, U. of London) ; Kieffer, Robert (CERN) ; Mazzoni, Stefano (CERN) ; Shanks, James (Cornell U., CLASSE)
This paper presents the design on the Cornell Electron Storage Ring (CESR) of an experimental set-up to meas-ure incoherent Diffraction Cherenkov Radiation (DChR) produced in a 2 cm long SiO2 radiator by a 2.1 GeV elec-tron beam. The electron beam is circulating at a distance of few mm from the edge of the radiator and the DChR photon output power is expected to be significantly higher than the diffraction radiation power emitted from a metal-lic slit of similar aperture. [...]
CERN-ACC-2017-280.-
2017 - 4 p.
- Published in : 10.18429/JACoW-IPAC2017-MOPAB118
Fulltext: PDF;
In : 8th International Particle Accelerator Conference, Copenhagen, Denmark, 14 - 19 May 2017, pp.MOPAB118
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