2020-01-25
10:34 |
Angular asymmetry of the nuclear interaction probability of high energy particles in short bent crystals
/ Scandale, W (CERN) ; Cerutti, F (CERN) ; Esposito, L S (CERN) ; Garattini, M (CERN ; Imperial Coll., London) ; Gilardoni, S (CERN) ; Natochii, A (CERN ; Orsay, LAL ; Taras Shevchenko U.) ; Rossi, R (CERN) ; Smirnov, G I (CERN ; Dubna, JINR) ; Zhovkovska, V (CERN ; Taras Shevchenko U.) ; Galluccio, F (INFN, Naples ; Naples U.) et al.
The rate of inelastic nuclear interactions in a short bent silicon crystal was precisely measured for the first time using a 180 GeV/c positive hadron beam produced in the North Experimental Area of the CERN SPS. An angular asymmetry dependence on the crystal orientation in the vicinity of the planar channeling minimum has been observed. [...]
2020 - 5 p.
- Published in : Eur. Phys. J. C 80 (2020) 27
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2020-01-21
09:52 |
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2020-01-21
06:00 |
Design, construction, and beam tests of a rotatable collimator prototype for high-intensity and high-energy hadron accelerators
/ Markiewicz, T (SLAC) ; Bong, E (SLAC) ; Keller, L (SLAC) ; Smith, J (SLAC) ; Aberle, O (CERN) ; Accettura, C (CERN) ; Bertarelli, A (CERN) ; Berthome, E (CERN) ; Biancacci, N (CERN) ; Butcher, M (CERN) et al.
A rotatable-jaw collimator design was conceived as a solution to recover from catastrophic beam impacts which would damage a collimator at the Large Hadron Collider (LHC) or its High-Luminosity upgrade (HL-LHC). One such rotatable collimator prototype was designed and built at SLAC and delivered to CERN for tests with LHC-type circulating beams in the Super Proton Synchrotron (SPS). [...]
2019 - 15 p.
- Published in : Phys. Rev. Accel. Beams 22 (2019) 123002
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2020-01-15
16:47 |
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2020-01-15
13:52 |
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2020-01-10
17:30 |
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Deliverable 2.10: Summary of the observations in the SPS and update of the estimates for HL-LHC
/ Alekou, Androula (University of Manchester (GB)) ; Antoniou, Fanouria (CERN) ; Appleby, Robert Barrie (University of Manchester (GB)) ; Bartosik, Hannes (CERN) ; Calaga, Rama (CERN) ; Carla', Michele (CERN) ; Carver, Lee Robert (University of Liverpool (GB)) ; Papaphilippou, Yannis (CERN) ; Welsch, Carsten Peter (University of Liverpool (GB))
Over the course of 2018, 7 machine developments were conducted for dedicated crab cavity measurements with each measurement slot consisting of 10 hours of SPS machine time. [...]
CERN-ACC-2020-0002.
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2020. - 22 p.
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2020-01-10
17:18 |
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Deliverable 2.7: Analysis of the existing sources of blow-up in the SPS by experiments and estimation/measurement of the effect of the crab cavities in the SPS
/ Alekou, Androula (University of Manchester (GB)) ; Antoniou, Fanouria (CERN) ; Appleby, Robert Barrie (University of Manchester (GB)) ; Bartosik, Hannes (CERN) ; Calaga, Rama (CERN) ; Carla', Michele (CERN) ; Carver, Lee Robert (University of Liverpool (GB)) ; Papaphilippou, Yannis (CERN) ; Welsch, Carsten Peter (University of Liverpool (GB))
The Crab Cavities (CCs) may induce emittance growth, driven by phase and amplitude jitter, and lead to a degradation of the High Luminosity LHC (HL-LHC) beam. [...]
CERN-ACC-2020-0001.
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2020. - 18 p.
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2020-01-10
06:24 |
Commissioning of the electron injector for the AWAKE experiment
/ Kim, S -Y (UNIST, Ulsan) ; Doebert, S (CERN) ; Apsimon, O (Manchester U.) ; Apsimon, R (Lancaster U.) ; Burt, G (Lancaster U. ; Cockcroft Inst. Accel. Sci. Tech.) ; Dayyani, M (IPM, Tehran) ; Gessner, S (CERN) ; Gorgisyan, I (CERN) ; Granados, E (CERN) ; Mazzoni, S (CERN) et al.
The advanced wakefield experiment (AWAKE) at CERN is the first proton beam-driven plasma wakefield acceleration experiment. The main goal of AWAKE RUN 1 was to demonstrate seeded self-modulation (SSM) of the proton beam and electron witness beam acceleration in the plasma wakefield. [...]
2020 - 7 p.
- Published in : Nucl. Instrum. Methods Phys. Res., A 953 (2020) 163194
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2020-01-10
06:24 |
Studies of the conventional beams working group within the physics beyond colliders framework at CERN
/ Montbarbon, E (CERN) ; Banerjee, D (CERN ; Illinois U., Urbana) ; Bernhard, J (CERN) ; Brugger, M (CERN) ; Charitonidis, N (CERN) ; D'Alessandro, G L (CERN ; Royal Holloway, U. of London) ; Doble, N (CERN ; INFN, Pisa) ; Gatignon, L (CERN) ; Gerbershagen, A (CERN) ; Rae, B (CERN) et al.
An exploratory study has been launched at CERN in 2016 aiming at exploiting the full scientific potential of CERN’s accelerator complex and its scientific infrastructure through projects complementary to the LHC, HL-LHC and other possible future colliders. These projects will address possible experiments over the period from 2021 to about 2040. [...]
2020 - 4 p.
- Published in : Nucl. Instrum. Methods Phys. Res., B 464 (2020) 1-4
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2019-12-20
08:09 |
Resistive wall impedance in elliptical multilayer vacuum chambers
/ Migliorati, M (U. Rome La Sapienza (main) ; INFN, Rome) ; Palumbo, L (U. Rome La Sapienza (main) ; INFN, Rome) ; Zannini, C (CERN) ; Biancacci, N (CERN) ; Vaccaro, V G (INFN, Naples ; Naples U.)
The resistive wall impedance of a vacuum chamber with elliptic cross section is of particular interest for circular particle accelerators as well as for undulators in free electron lasers. By using the electric field of a point charge and of a small dipole moving at arbitrary speed in an elliptical vacuum chamber, expressed in terms of Mathieu functions, in this paper we take into account the finite conductivity of the beam pipe walls by means of the surface impedance, and evaluate the longitudinal and transverse driving and detuning impedances for any beam velocity. [...]
2019 - 16 p.
- Published in : Phys. Rev. Accel. Beams 22 (2019) 121001
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