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Najnovije dodano:
2021-07-30
16:59
MD2193 – Impedance Measurements of the TCSPM Prototype Collimator / Amorim, David (Universite Grenoble-Alpes (FR)) ; Antipov, Sergey ; Arsenyev, Sergey ; Azzopardi, Gabriella (CERN) ; Biancacci, Nicolo (CERN) ; Bruce, Roderik (CERN) ; Carver, Lee Robert (University of Liverpool (GB)) ; Fitterer, Miriam ; Giordano, Francesco (Universita e sezione INFN di Napoli (IT)) ; Lamas Garcia, Inigo et al.
In view of the HL–LHC project, it is planned to exchange 9 out 11 of the LHC secondary collimators in IR7, made of graphite, with low–impedance ones. [...]
CERN-ACC-NOTE-2021-0021.
- 2021. - 17 p.

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2021-07-30
16:54
MD2191 – β∗–Reach: 2017 IR7 Collimation Hierarchy Limit and Impedance / Mereghetti, Alessio ; Amorim, David (Universite Grenoble-Alpes (FR)) ; Antipov, Sergey ; Azzopardi, Gabriella (CERN) ; Carver, Lee Robert (University of Liverpool (GB)) ; Metral, Elias (CERN) ; Redaelli, Stefano (CERN) ; Salvant, Benoit (CERN) ; Valentino, Gianluca (University of Malta (MT)) ; Valuch, Daniel (CERN)
This report summarises the results of MD2191 about the hierarchy limit of the LHC collimation system in IR7 at 6.5 TeV and its impedance. [...]
CERN-ACC-NOTE-2021-0020.
- 2021. - 19 p.

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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
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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2021-07-20
18:28
Mechanical Behavior of the Shielded HL-LHC Beam Screen during a Magnet Quench / Morrone, Marco (CERN) ; Garion, Cedric (CERN) ; Chiggiato, Paolo (CERN) ; Sacristan De Frutos, Oscar ; Guinchard, Michael (CERN) ; Fiscarelli, Lucio (CERN)
In the framework of the High-Luminosity Large Hadron Collider (HL-LHC) project, larger and shielded beam screens will be installed in the beam pipe of the superconducting magnets of the insertion next to the ATLAS and CMS detectors. The beam screen is a complex assembly that guarantees the vacuum requirements while shielding the magnet cold mass from the induced heat loads. [...]
CERN-ACC-2021-0005.- Geneva : CERN, 2021 - 24 p. - Published in : IEEE Trans. Appl. Supercond. 31 (2021) 9000616 Fulltext: PDF;

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2021-07-13
15:39
Direct Digitisation for Position Measurement of Charged Particle Beams: Sampling and Quantisation Effects on Resolution / Degl'Innocenti, Irene
With the technology improvements of Analog-to-Digital Converters (ADC), notable in terms of sampling rate and achievable resolution, the direct digitisation of beam pickup signals is of growing interest in the field of particle beam diagnostics for charged particle accelerators [...]
CERN-THESIS-2020-357 -


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2021-07-07
21:14
Monte Carlo simulations of light Estimating and comparing the photon rates of different sources at the Beam Gas Curtain monitor's camera / Jens, Noah
This thesis aims at giving a rough estimation of the photon rates and with that the ratio of signal to background radiation on the Beam Gas Curtain's camera, an instrument to measure the concentricity and position of the Hollow Electron lens's electron beam relative to the LHC's proton beam, by imag [...]
CERN-THESIS-2021-082 - Luebeck : Noah JENS, 2021-07-01. - 69 p.


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2021-06-25
06:15
Assembly and Tests of Mechanical Models of the 15-T Nb$_3$Sn Dipole Demonstrator / Orozco, Charles (Fermilab) ; Carmichael, Justin (Fermilab) ; Novitski, Igor (Fermilab) ; Stoynev, Stoyan (Fermilab) ; Zlobin, Alexander V (Fermilab)
Within the U.S. [...]
FERMILAB-CONF-18-579-TD.
- 2019. - 4 p.
Fermilab Accepted Manuscript - Fulltext

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2021-06-25
06:14
Heat Treatment Optimization of Rutherford Cables for a 15-T Nb$_3$Sn Dipole Demonstrator / Barzi, Emanuela (Fermilab) ; Bossert, Marianne (Fermilab) ; Field, Michael (Fermilab) ; Li, Pei (Fermilab) ; Miao, Hanping (Fermilab) ; Parrell, Jeff (Fermilab) ; Turrioni, Daniele (Fermilab) ; Zlobin, Alexander V (Fermilab) /HighFled Magnets Collaboration
Fermi National Accelerator Laboratory has been developing a 15-T Nb$_3$Sn dipole demonstrator for a future very high energy pp collider based on an optimized 60-mm aperture four-layer “cos-theta” coil. To increase the magnet efficiency, the coil was graded by using two cables with same 15 mm width and different thicknesses made of two different restacked rod process (RRP) wires. [...]
FERMILAB-CONF-16-607-TD.- 2017 - 5 p. - Published in : IEEE Trans. Appl. Supercond. 27 (2017) 4802905 Fulltext: PDF; External link: Fermilab Accepted Manuscript
In : Applied Superconductivity Conference, Denver, CO, USA, 4 - 9 Sep 2016, pp.4802905

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2021-06-25
06:14
Magnetic and Mechanical Analysis of the HQ Model Quadrupole Designs for LARP / Felice, Helene (LBNL, Berkeley) ; Caspi, Shlomo (LBNL, Berkeley) ; Ferracin, Paolo (LBNL, Berkeley) ; Kashikhin, Vadim (Fermilab) ; Novitski, Igor (Fermilab) ; Sabbi, GianLuca (LBNL, Berkeley) ; Zlobin, Alexander (Fermilab)
Insertion quadrupoles with large bore and high gradient are required to upgrade the luminosity of the large hadron collider (LHC). The US LHC accelerator research program is developing Nb$_3$Sn technology for the upgrade. [...]
2008 - 4 p. - Published in : IEEE Trans. Appl. Supercond. 18 (2008) 281-284
In : 20th International Conference on Magnet Technology, Philadelphia, PA, USA, 27 - 31 Aug 2007, pp.281-284

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Fokus na:
High Luminosity Large Hadron Collider (HL-LHC) (910)
HiLumi LHC (264)