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ATS Notes

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2019-10-10
16:03
TID, ΦHEH and ΦThN measurements along the SPS accelerator and the adjacent Tunnel Access Areas / Brucoli, Matteo (CERN) ; Danzeca, Salvatore (CERN) ; Martinella, Corinna (University of Jyvaskyla (FI)) ; Kadi, Yacine (CERN) ; Garcia Alia, Ruben (CERN)
In this document, the measurements of Total Ionizing Dose, High Energy Hadron fluence and Thermal Neutron fluence are presented for some areas of the Super Proton Synchrotron, cumulated during 2017 and 2018 [...]
CERN-ACC-NOTE-2019-0043. - 2019. - 19 p.
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2019-10-09
09:01
Report and Analysis from LHC MD 3311: Amplitude detuning at end-of-squeeze / Dilly, Joschua Werner (Humboldt University of Berlin (DE)) ; Albert, Markus (CERN) ; Argyropoulos, Theodoros (CERN) ; Carlier, Felix Simon (Technische Universiteit Delft (NL)) ; Hofer, Michael (Vienna University of Technology (AT)) ; Malina, Lukas (CERN) ; Maclean, Ewen Hamish (University of Malta (MT)) ; Solfaroli Camillocci, Elena (Sapienza Universita e INFN, Roma I (IT)) ; Tomas Garcia, Rogelio (CERN)
Amplitude detuning at end-of-squeeze is measured during this MD, with both flat-orbit and crossing-angles in IP5. [...]
CERN-ACC-NOTE-2019-0042. - 2019. - 39 p.
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2019-10-08
19:34
Beam-induced heat loads on the beam screens of the HL-LHC arcs / Skripka, Galina (Joint Institute for Nuclear Research (RU)) ; Iadarola, Giovanni (CERN)
The heat load on the beam screens of cold magnets and drift sections in the HL-LHC arcs is estimated considering power deposition from impedance, synchrotron radiation and electron cloud. [...]
CERN-ACC-NOTE-2019-0041. - 2019. - 25 p.
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2019-10-08
12:00
Report on the Prompt Dose Distribution Along the LHC Based on BLM Data for proton-proton operation in Run 2 / Bilko, Kacper (CERN) ; Stein, Oliver
In this report dose levels and the distributions of the prompt total ionising dose along the LHC for the proton-proton operation are presented for Run 2, covering the accelerator operation periods in 2015, 2016, 2017 and 2018. [...]
CERN-ACC-NOTE-2019-0040. - 2019. - 126 p.
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2019-10-08
10:00
Ideas and proposal for improved longitudinal beam observation in the PS / Kozlowski, Pawel (Warsaw University of Technology (PL)) ; Lasheen, Alexandre (CERN)
A new Wall Current Monitor is planned to be installed in the PS during the Year-End Technical Stop 2021-2022 to install a Beam Quality Monitor in the PS, like in the SPS. [...]
CERN-ACC-NOTE-2019-0039. - 2019. - 8 p.
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2019-09-19
16:25
A VdM Sequence File Web Application / Hickman, Thomas Kendall ; Marqversen, Frederik Kofoed ; Calia, Andrea (CERN) ; Hostettler, Michi (CERN)
To perform Van der Meer scans at the LHC, the experimental collaborations have to supply a text file containing a command sequence specifying the beam positions required. [...]
CERN-ACC-NOTE-2019-0038. - 2019.

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2019-09-19
11:31
Studies of PACMAN effects in the HL-LHC / Ribes Metidieri, Ariadna (University of Barcelona (ES)) ; Buffat, Xavier (CERN)
This note summarises the status of the studies on PACMAN beam-beam effects in the HL-LHC project. [...]
CERN-ACC-NOTE-2019-0037. - 2019. - 34 p.
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2019-08-30
15:42
LHC injection losses for tighter collimator settings in view of the HE-LHC / Crouch, Matthew Paul (CERN) ; Bartmann, Wolfgang (CERN)
In view of the smaller physical apertures of Nb3Sn magnets for the HE-LHC study, a machine study was performed in the LHC to tighten correspondingly the ring and injection protection collimators and measure the change in loss behaviour [...]
CERN-ACC-NOTE-2019-0036. - 2019. - 8 p.

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2019-08-27
11:48
WEPLATE WP8 6DOF ALIGNMENT PLATFORM / Lino Diogo Dos Santos, Miguel (CERN) ; Evrard, Sebastien (CERN) ; Fuchs, Jean-Frederic (CERN) ; Labarthe-Vacquier, Julien (CERN) ; Sanchez Galan, Francisco (CERN) ; Vieille, Alban (CERN)
In the context of the LHC (Large Hadron Collider) upgrade at CERN (European Organization for Nuclear Research) known as HL-LHC (High Luminosity LHC) which will increase the LHC luminosity (rate of collisions) by a factor of five beyond the original design value and the integrated luminosity (total collisions created) by a factor ten, WP8 (Work Package 8) proposed a new alignment platform concept for the alignment of TANB (Target Absorber Neutrals) being installed in LS2 (Long Shutdown 2) at Point 8. [...]
CERN-ACC-NOTE-2019-0035. - 2019. - 23 p.
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2019-08-08
11:08
MD 4145: Study of Landau damping with an Antidamper / Antipov, Sergey (CERN) ; Albert, Markus (CERN) ; Amorim, David (U. Grenoble Alpes) ; Biancacci, Nicolo (CERN) ; Buffat, Xavier (CERN) ; Carideo, Emanuela (Sannio U.) ; Metral, Elias (CERN) ; Mounet, Nicolas (CERN) ; Oeftiger, Adrian (Darmstadt, GSI) ; Trad, Georges (CERN) et al.
Landau damping is an essential mechanism for ensuring the transverse beam stability in LHC and its upgrades. [...]
CERN-ACC-NOTE-2019-0034. - 2019. - 17 p.
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LHC MD Notes (133)