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Accelerators & Technology Sector Notes

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2022-04-21
12:13
How to Install and Operate Fixed Target Experiments in the North an East Experimental Areas at CERN / Gerbershagen, Alexander (CERN) ; Banerjee, Dipanwita (CERN) ; Bernhard, Johannes (CERN) ; Brugger, Markus (CERN) ; Charitonidis, Nikolaos (CERN) ; Gatignon, Lau (Lancaster University (GB)) ; Lazzaroni, Michael (CERN) ; Romagnoli, Giulia (CERN)
This note describes the required input, decision process and life cycle for the design, installation/adaptation, and operation of fixed target beam lines at the North and East Areas at CERN. [...]
CERN-ACC-NOTE-2022-0015. - 2022. - 8 p.
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2022-04-20
11:48
SPS MD5044: machine stability characterisation of Gamma Factory SPS Proof-of-Principle Experiment / Ramjiawan, Rebecca Louise (CERN) ; Bartosik, Hannes (CERN) ; Dutheil, Yann (CERN) ; Hofle, Wolfgang (CERN) ; Krasny, Mieczyslaw Witold (Centre National de la Recherche Scientifique (FR)) ; Martens, Aurelien (Université Paris-Saclay (FR)) ; Papaphilippou, Yannis (CERN) ; Petrenko, Alexey ; Velotti, Francesco Maria (CERN)
The Gamma Factory (GF) initiative proposes an innovative method of producing high-energy, high-intensity photon beams via the laser-excitation and subsequent decay of relativistic partially stripped ions stored in the CERN LHC. [...]
CERN-ACC-NOTE-2022-0014 ; CERN-PBC-Notes-2022-006. - 2022. - 16 p.
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2022-04-19
14:45
Magnetic measurements of MCBC and MCBY orbit correctors under special cycling conditions / Chmielinska, Agnieszka (CERN) ; Fiscarelli, Lucio (CERN) ; Todesco, Ezio (CERN) ; Kozanecki, Witold (Université Paris-Saclay (FR))
In the LHC, in addition to normal beam operation, the MCBC and MCBY orbit-corrector magnets are used for deflecting the beam during the van der Meer (vdM) scans used for calibrating the absolute luminosity scale. [...]
CERN-ACC-NOTE-2022-0013. - 2022. - 28 p.
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2022-03-29
18:20
Optimal LHC optics phasing conditions for long-range beam-beam compensation and flat optics / Fartoukh, Stephane (CERN)
This note describes a new possible phasing configuration for the (HL-)LHC optics, in order to further reduce the minimum allowed distance of beam-beam wire compensators with respect to the beam. [...]
CERN-ACC-NOTE-2022-0012. - 2022. - 17 p.
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2022-03-29
18:15
On the Evolution of the chromatic Functions around an IP computed by MAD-X / Carli, Christian (CERN) ; Skoufaris, Kyriacos (CERN)
The chromatic functions W defined by Montague are computed by MAD-X. [...]
CERN-ACC-NOTE-2022-0011. - 2022. - 7 p.
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2022-03-28
09:42
Beam Induced Effects in Beam Gas Ionisation Monitors Designed for the High-Luminosity LHC Era / Kramer, Patrick (CERN)
Beam induced RF heating has been observed in Beam Gas Ionisation (BGI) monitors of the LHC in the past. [...]
CERN-ACC-NOTE-2022-0010. - 2022. - 10 p.
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2022-02-24
15:24
Evaluation of the Energy Economy in East Area using measurements from the first year of operation / Papastergiou, Konstantinos (CERN)
In view of the East Area (EA) renovation as well as for various other consolidation programmes, the electrical power converters group of CERN embarked on a major development project for new regenerative power converters with built-in energy storage. [...]
CERN-ACC-NOTE-2022-0008. - 2022. - 18 p.
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2022-02-22
15:31
Comparative Study on Scenarios for Rotating Gantry Mechanical Structures / Piacentini, Luca (Riga Technical University (LV)) ; Dassa, Luca (CERN) ; Perini, Diego (CERN) ; Ratkus, Andris (Riga Technical University (LV)) ; Torims, Toms (Riga Technical University (LV)) ; Vilcans, Janis (Riga Technical University (LV)) ; Vretenar, Maurizio (CERN)
This technical note outlines a comparative study on scenarios of gantries mechanical design for ion-therapy of cancer, which is a crucial step toward the development of the next ion medical machine. [...]
CERN-ACC-NOTE-2022-0007 ; NIMMS-Note-006. - 2022. - 17 p.
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2022-01-27
14:58
Start collisions at 1m β∗ (MD 3349) / Calia, Andrea (CERN) ; Jacquet, Delphine (CERN) ; Wenninger, Jorg (CERN) ; Fuchsberger, Kajetan ; Hostettler, Michi (CERN)
This document summarises the LHC Machine Development session on colliding at β∗ = 1 m and squeezing with colliding beams to β∗ = 25 cm in IP 1 and 5 using the capabilities of the LumiServer. [...]
CERN-ACC-NOTE-2022-0006. - 2021. - 6 p.
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2022-01-21
12:01
Nonadiabatic electron gun at an electron beam ion source: Commissioning results and charge breeding investigations / Pahl, Hannes (CERN) ; Bidault, Niels Killian Noal (CERN) ; Khatri, Gunn (CERN) ; Pikin, Alexander (Centro de Investigaciones Energéticas Medioambientales y Tec. (ES)) ; Wenander, Fredrik John Carl (CERN)
The electron gun of the REXEBIS charge breeder at the REX/HIE-ISOLDE facility at CERN has been upgraded from a standard magneto-immersed type to a gun using a nonadiabatic magnetic element [...]
CERN-ACC-NOTE-2022-0005. - 2022.
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