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ATS Notes

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2020-03-31
10:36
Intra-Bunch Motion / Metral, Elias (CERN)
Impedance-driven coherent beam instabilities are usually studied analytically with the linearised Vlasov equation, ending up with an eigenvalue system to solve [...]
CERN-ACC-NOTE-2020-0018. - 2020.
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2020-03-25
16:02
Compensation of Synchrotron Radiation at Top Energy in the FCC-hh / Haas, Alexander (Vienna University of Technology (AT)) ; Timko, Helga (CERN)
To counteract the significant synchrotron radiation damping in the FCC-hh, a continuous longitudinal emittance blow-up is foreseen at top energy. [...]
CERN-ACC-NOTE-2020-0017. - 2019. - 8 p.
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2020-03-24
17:10
Stripper foil investigations at Linac3 / Bellodi, Giulia (CERN) ; Kuchler, Detlef (CERN) ; Mahner, Edgar (CERN) ; Scrivens, Richard (CERN) ; Wenander, Fredrik John Carl (CERN)
This report contains a summary of the investigations performed on the carbon stripper foils at Linac3 during the period 2016 to 2018 [...]
CERN-ACC-NOTE-2020-0016. - 2020. - 24 p.
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2020-03-06
16:25
MD1787 - LHC TDI tune shift measurement at injection / Amorim, David (Universite Grenoble-Alpes (FR)) ; Biancacci, Nicolo (CERN) ; Carbajo Perez, David (CERN) ; Carver, Lee Robert (University of Liverpool (GB)) ; Metral, Elias (CERN) ; Rijoff, Tatiana Libera ; Salvant, Benoit (CERN) ; Soderen, Martin (CERN) ; Valuch, Daniel (CERN)
This report summarizes the results of the backup activity performed after cancellation of the MD1787 [...]
CERN-ACC-NOTE-2020-0015. - 2019. - 3 p.
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2020-02-21
09:30
A Proposal for an Automatic Longitudinal Tomography Demonstration Project in the Proton Synchrotron Booster / Albright, Simon (CERN)
Longitudinal phase space tomography is a vital tool for beam diagnostics in most of the CERN synchrotrons, it is used to reconstruct the longitudinal phase space, and to measure the longitudinal emittance and energy spread. [...]
CERN-ACC-NOTE-2020-0014. - 2020. - 12 p.
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2020-02-18
12:10
MD4944: Local linear coupling measurement at the IPs / Persson, Tobias Hakan Bjorn (CERN) ; Carlier, Felix Simon (Technische Universiteit Delft (NL)) ; Hofer, Michael (Vienna University of Technology (AT)) ; Maclean, Ewen Hamish (University of Malta (MT)) ; Tomas Garcia, Rogelio (CERN) ; Garcia-Tabares Valdivieso, Ana (Universidad Complutense (ES))
It was observed that a large local linear coupling around IP2 reduced the luminosity during the 2018 ion run. [...]
CERN-ACC-NOTE-2020-0013. - 2020. - 9 p.

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2020-02-04
11:13
FLUKA simulations of the operational injection losses in TI8/IR8 / Ciccotelli, Alessia (CERN) ; Bracco, Chiara (CERN) ; Cerutti, Francesco (CERN) ; Esposito, Luigi Salvatore (CERN) ; Fraser, Matthew Alexander (CERN) ; Kain, Verena (CERN) ; Mereghetti, Alessio (CERN) ; Velotti, Francesco Maria (CERN)
This document describes the FLUKA studies of SPS-to-LHC injection losses. [...]
CERN-ACC-NOTE-2020-0012. - 2020. - 25 p.
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2020-01-23
17:31
MD 3584: Long-Range Beam-Beam 2018 / Karastathis, Nikos ; Fartoukh, Stephane (CERN) ; Kostoglou, Sofia (National Technical Univ. of Athens (GR)) ; Papaphilippou, Yannis (CERN) ; Pojer, Mirko (CERN) ; Poyet, Axel (Universite Grenoble-Alpes (FR)) ; Solfaroli Camillocci, Matteo (CERN) ; Sterbini, Guido (CERN)
A recurrent issue of the LHC operation, observed both during Run1 and Run2 is the asymmetric behaviour of the two beams in terms of particle losses. [...]
CERN-ACC-NOTE-2020-0011. - 2020. - 29 p.
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2020-01-23
14:37
LHC MD 2401: Beam-Based Measurement of the MKD Rise Time / Wiesner, Christoph (CERN) ; Bartmann, Wolfgang (CERN) ; Bracco, Chiara (CERN) ; Carlier, Etienne (CERN) ; Fraser, Matthew Alexander (CERN) ; Hessler, Christoph ; Magnin, Nicolas (CERN) ; Renner, Elisabeth (Vienna University of Technology (AT))
This note summarises the beam-based measurements of the MKD rise time for both LHC beams performed during MD4 on December 2nd, 2017 and discusses the results [...]
CERN-ACC-NOTE-2020-0010. - 2018. - 6 p.
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2020-01-17
14:37
LHC MD4044: Asynchronous Beam Dump Test with Bunched Beam at Flat Top / Wiesner, Christoph (CERN) ; Apollonio, Andrea (CERN) ; Bartmann, Wolfgang (CERN) ; Bracco, Chiara (CERN) ; Carlier, Etienne (CERN) ; Frankl, Matthias Immanuel ; Fraser, Matthew Alexander (CERN) ; Hessler, Christoph ; Lechner, Anton (CERN) ; Magnin, Nicolas (CERN) et al.
This note summarises the LHC Machine Development (MD) 4044, which studied the beam-loss and quench behaviour during asynchronous beam dumps at injection and at top energy using bunched beam in the abort gap. [...]
CERN-ACC-NOTE-2020-0009. - 2020. - 15 p.
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LHC MD Notes (147)