CERN Accelerating science

All CERN Accelerators documents

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2018-10-18
13:31
Investigation on metallic high vacuum gaskets in conjunction with quick-disconnects for circular and large rectangular flanges / Kuhn, H K
CERN-LabII-Tech-Note-72-004-BT ; LabII-BT-HK-EEK-E-4.
- 1972. - 16 p.
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2018-10-18
09:02
Prototype Inductive Adders With Extremely Flat-Top Output Pulses for the Compact Linear Collider at CERN / Holma, Janne (CERN) ; Barnes, Michael J (CERN)
The compact linear collider (CLIC) study is exploring the scheme for an electron–positron collider with high luminosity and a nominal center-of-mass energy of 3 TeV. [...]
2018. - 11 p.
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2018-10-18
09:02
Mechanisms of Electron-Induced Single-Event Upsets in Medical and Experimental Linacs / Tali, Maris (CERN ; ESTEC, Noordwijk ; Jyvaskyla U.) ; Garcia Alia, Ruben (CERN) ; Brugger, Markus (CERN) ; Ferlet-Cavrois, Veronique (ESTEC, Noordwijk) ; Corsini, Roberto (CERN) ; Farabolini, Wilfrid (CERN) ; Javanainen, Arto (Jyvaskyla U.) ; Kastriotou, Maria (CERN) ; Kettunen, Heikki (Jyvaskyla U.) ; Santin, Giovanni (ESTEC, Noordwijk) et al.
In this paper, we perform an in-depth analysis of the single-event effects observed during testing at medical electron linacs and an experimental high-energy electron linac. [...]
2018. - 9 p.

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2018-10-18
09:02
Distributed Optical Fiber Radiation Sensing in the Proton Synchrotron Booster at CERN / Di Francesca, D (CERN) ; Toccafondo, I (CERN) ; Li Vecchi, G (CERN ; Lab. Hubert Curien, St. Etienne) ; Calderini, S (CERN) ; Girard, S (Lab. Hubert Curien, St. Etienne) ; Alessi, A (Lab. Hubert Curien, St. Etienne) ; Ferraro, R (CERN) ; Danzeca, S (CERN) ; Kadi, Y (CERN) ; Brugger, M (CERN)
In this paper, we report on the development and first deployment of a distributed optical fiber radiation sensor (DOFRS) for the online monitoring of radiation levels in the high-energy accelerator facilities of CERN. [...]
2018. - 6 p.

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2018-10-18
09:02
Metrological Characterization of Nuclear Magnetic Resonance Markers for Real-Time Field Control of the CERN ELENA Ring Dipoles / Grech, Christian (CERN ; U. Malta) ; Avramidou, Rachel (CERN ; U. Derby) ; Beaumont, Anthony (CERN ; Ecole Polytechnique, Lausanne) ; Buzio, Marco (CERN) ; Sammut, Nicholas (U. Malta) ; Tinembart, Jacques (METROLAB, Geneva)
Field markers in particle accelerators are used to provide a digital trigger when the magnetic field reaches a preset threshold. [...]
2018. - 8 p.

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2018-10-17
06:01
Cross-wake force and correlated head-tail instability in beam-beam collisions with a large crossing angle / Kuroo, Nami (KEK, Tsukuba ; Tsukuba U. (main)) ; Ohmi, Kazuhito (KEK, Tsukuba) ; Oide, Katsunobu (KEK, Tsukuba ; CERN) ; Zhou, Demin (KEK, Tsukuba ; CERN) ; Zimmermann, Frank (CERN)
This paper discusses novel coherent beam-beam instability in collisions with a large crossing angle. The instability appears in the correlated head-tail motion of two colliding beams. [...]
2018 - 15 p. - Published in : Phys. Rev. Accel. Beams 21 (2018) 031002 Fulltext: PDF;

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2018-10-17
06:01
Beam measurement of the high frequency impedance sources with long bunches in the CERN Super Proton Synchrotron / Lasheen, A (CERN ; Orsay) ; Argyropoulos, T (CERN) ; Bohl, T (CERN) ; Esteban Müller, J  F (CERN) ; Timko, H (CERN) ; Shaposhnikova, E (CERN)
Microwave instability in the Super Proton Synchrotron (SPS) at CERN is one of the main limitations to reach the requirements for the High Luminosity-LHC project (increased beam intensity by a factor 2). To identify the impedance source responsible of the instability, beam measurements were carried out to probe the SPS impedance. [...]
2018 - 13 p. - Published in : Phys. Rev. Accel. Beams 21 (2018) 034401 Fulltext: PDF;

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2018-10-17
06:01
Proton beam induced dynamics of tungsten granules / Caretta, O (Rutherford) ; Loveridge, P (Rutherford) ; O'Dell, J (Rutherford) ; Davenne, T (Rutherford) ; Fitton, M (Rutherford) ; Atherton, A (Rutherford) ; Densham, C (Rutherford) ; Charitonidis, N (CERN) ; Efthymiopoulos, I (CERN) ; Fabich, A (CERN) et al.
This paper reports the results from single-pulse experiments of a 440  GeV/$c$ proton beam interacting with granular tungsten samples in both vacuum and helium environments. Remote high-speed photography and laser Doppler vibrometry were used to observe the effect of the beam on the sample grains. [...]
2018 - 15 p. - Published in : Phys. Rev. Accel. Beams 21 (2018) 033401 Fulltext: PDF;

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2018-10-17
06:01
Thermostructural characterization and structural elastic property optimization of novel high luminosity LHC collimation materials at CERN / Borg, M (Malta U.) ; Bertarelli, A (CERN) ; Carra, F (CERN) ; Gradassi, P (CERN) ; Guardia-Valenzuela, J (CERN) ; Guinchard, M (CERN) ; Arnau Izquierdo, G (CERN) ; Mollicone, P (Malta U.) ; Sacristan-de-Frutos, O (CERN) ; Sammut, N (Malta U.)
The CERN Large Hadron Collider is currently being upgraded to operate at a stored beam energy of 680 MJ through the High Luminosity upgrade. The LHC performance is dependent on the functionality of beam collimation systems, essential for safe beam cleaning and machine protection. [...]
2018 - 15 p. - Published in : Phys. Rev. Accel. Beams 21 (2018) 031001 Fulltext: PDF;

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2018-10-17
06:01
Feasibility of diffraction radiation for noninvasive beam diagnostics as characterized in a storage ring / Bobb, L (Diamond Light Source) ; Kieffer, R (CERN) ; Lefevre, T (CERN) ; Mazzoni, S (CERN) ; Aumeyr, T (Royal Holloway, U. of London) ; Karataev, P (Royal Holloway, U. of London) ; Billing, M (Cornell U.) ; Conway, J (Cornell U.) ; Shanks, J (Cornell U.)
In recent years, there has been an increasing demand for noninvasive beam size monitoring on particle accelerators. Ideally, these monitors should be cost effective and require little or no maintenance. [...]
2018 - 17 p. - Published in : Phys. Rev. Accel. Beams 21 (2018) 032801 Fulltext: PDF;

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