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2021-07-28
09:00
Comparison between measured radiation levels and FLUKA simulations at CHARM and in the LHC tunnel of P1-5 within the R2E project in Run 2 / Prelipcean, Daniel (TUM)
This thesis aims to benchmark the measured values of the radiation monitors employed at the European Organisation for Nuclear Research (CERN), focusing on the Large Hadron Collider (LHC), for Radiation to Electronics (R2E) applications with their simulated values using the FLUKA Monte Carlo code. In the following, a brief introduction of each chapter is provided. [...]
CERN-THESIS-2021-101.- Munich, Germany : Technical University of Munich, 2021-07-26 - 131 p. Fulltext: PDF; External link: Approve this document (restricted)

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2021-07-27
08:44
The IRRAD Data Manager (IDM) / Gkotse, Blerina (CERN ; U. PSL) ; Jouvelot, Pierre (U. PSL) ; Pezzullo, Giuseppe (CERN) ; Ravotti, Federico (CERN)
The Proton Irradiation Facility (IRRAD) is a reference facility at CERN for characterizing detectors and other accelerator components against radiation. To ensure reliable facility operations and smooth experimental data handling, a new IRRAD Data Manager (IDM) web application has been developed and first used during the last facility run before the CERN Long Shutdown 2. [...]
2019 - 5 p. - Published in : 10.18429/JACoW-ICALEPCS2019-MOPHA048 Fulltext: PDF;
In : 17th Biennial International Conference on Accelerator and Large Experimental Physics Control Systems (ICALEPCS), New York, United States, 5 - 11 Oct 2019, pp.MOPHA048

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2021-07-27
07:44
Simulation and Experimental Study of Proton Bunch Self-Modulation in Plasma with Linear Density Gradients / AWAKE Collaboration
We present numerical simulations and experimental results of the self-modulation of a long proton bunch in a plasma with linear density gradients along the beam path. [...]
arXiv:2107.11369. - 13 p.

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2021-07-25
23:14
Accelerating cavity and higher order mode coupler design for the Future Circular Collider / Gorgi Zadeh, Shahnam
CERN-THESIS-2020-358.- http://purl.uni-rostock.de/rosdok/id00003023 : Universität Rostock , 2021-05-11 Fulltext: PDF; External link: Approve this document (restricted)

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2021-07-22
17:45
Description of beam instabilities in synchrotrons with wakefields and space charge forces using the circulant matrix model / Buffat, X (CERN) ; Métral, E (CERN) ; Gottlob, E (Ecole Polytechnique, Lausanne ; U. Brussels (main)) ; Høgh, C (Ecole Polytechnique, Lausanne ; Imperial Coll., London) ; Oeftiger, A (Darmstadt, GSI ; CERN) ; Pieloni, T (Ecole Polytechnique, Lausanne)
A new model for the description of beam instabilities in synchrotrons featuring wakefields and space charge forces is proposed, using the circulant matrix approach. The predictions of this model are discussed in light of past ones, with a particular emphasis on the possible mitigation of the transverse mode coupling instability by space charge forces. [...]
2021 - 12 p. - Published in : Phys. Rev. Accel. Beams 24 (2021) 060101 Fulltext: PDF;

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2021-07-22
17:44
Kalman filter-based longitudinal phase-space reconstruction method for hadron machines / Alves, Diogo (CERN) ; Lasocha, Kacper (CERN)
This work proposes a novel longitudinal phase-space reconstruction method for hadron machines. The proposed method is based on a Kalman filter and can therefore provide real-time estimates of the phase-space reconstruction. [...]
2021 - 9 p. - Published in : Phys. Rev. Accel. Beams 24 (2021) 072801 Fulltext: PDF;

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2021-07-22
17:44
High-Temperature Superconductor Coatings for Beam Impedance Reduction in Particle Colliders: Nonlinear Effects / Calatroni, Sergio (CERN) ; Vaglio, Ruggero (CNR-SPIN, Naples ; INFN, Naples)
Coating of surfaces facing particle beams with hightemperature superconductors (HTS) for reducing the beam coupling impedance is being considered for the next generation of hadron colliders, such as the FCC-hh at CERN, where HTS would be exposed to the high-frequency wakefields generated by the particle bunches and to the strong field of the steering magnets. In this frame, we present a simple model for the calculation of the microwave response of HTS exposed to a strong external magnetic field, which takes into account the nonlinearity of the pinning potential of the vortex lattice. [...]
2021 - 8 p. - Published in : IEEE Trans. Appl. Supercond. 31 (2021) 3500208 Fulltext: PDF;

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2021-07-22
11:38
Local field reconstruction from rotating coil measurements in particle accelerator magnets / Ion, Ion Gabriel (Darmstadt, Tech. U.) ; Liebsch, Melvin (CERN) ; Simona, Abele (Darmstadt, Tech. U. ; Milan, Polytech.) ; Loukrezis, Dimitrios (Darmstadt, Tech. U.) ; Petrone, Carlo (CERN) ; Russenschuck, Stephan (CERN) ; De Gersem, Herbert (Darmstadt, Tech. U.) ; Schöps, Sebastian (Darmstadt, Tech. U.)
In this paper a general approach to reconstruct three dimensional field solutions in particle accelerator magnets from distributed magnetic measurements is presented. To exploit the locality of the measurement operation a special discretization of the Laplace equation is used. [...]
arXiv:2106.15168.- 2021-09-21 - Published in : Nucl. Instrum. Methods Phys. Res., A 1011 (2021) 165580

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2021-07-22
11:37
Performance and luminosity models for heavy-ion operation at the CERN Large Hadron Collider / Bruce, R. (CERN) ; Jebramcik, M.A. (CERN ; DESY) ; Jowett, J.M. (CERN ; Darmstadt, GSI) ; Mertens, T. (Helmholtz-Zentrum, Berlin) ; Schaumann, M. (CERN)
A good understanding of the luminosity performance in a collider, as well as reliable tools to analyse, predict, and optimise the performance, are of great importance for the successful planning and execution of future runs. In this article, we present two different models for the evolution of the beam parameters and the luminosity in heavy-ion colliders. [...]
arXiv:2107.09560.- 2021-07-12 - 24 p. - Published in : Eur. Phys. J. Plus 136 (2021) 745 Fulltext: PDF;

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2021-07-21
17:20
A novel facility for cancer therapy and biomedical research with heavy ions for the South East European International Institute for Sustainable Technologies / Damjanovic, Sanja (SEEIIST Association (CH)) ; Amaldi, Ugo (TERA Foundation (IT)) ; Benedetto, Elena (SEEIIST Association (CH)) ; Bisoffi, Giovanni (Universita e INFN, Legnaro (IT)) ; Dosanjh, Manjit ; Durante, Marco ; Foka, Yiota (GSI - Helmholtzzentrum fur Schwerionenforschung GmbH (DE)) ; Grubling, Peter (SEEIIST Association (CH)) ; Rossi, Sandro ; Sapinski, Mariusz (SEEIIST Association (CH)) et al.
The South East European International Institute for Sustainable Technologies (SEEIIST) proposes the construction of a major joint Research Infrastructure in the region, to rebuild cooperation after the recent wars and overcome lasting consequences like technology deficits and brain drain, having at its core a facility for cancer therapy and biomedical research with heavy ions [...]
CERN-ACC-NOTE-2021-0019 ; NIMMS-Note-005. - 2021. - 6 p.
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