CERN Accelerating science

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2020-04-06
17:28
Transverse mode-coupling instability in the presence of detuning impedance / Metral, Elias (CERN) ; Buffat, Xavier (CERN) ; Rumolo, Giovanni (CERN)
In non-axisymmetric beam pipes, a detuning impedance is present in addition to the usual driving impedance. [...]
CERN-ACC-NOTE-2020-0019.
- 2020. - 4 p.

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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) ; Bertolo, Sebastien (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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2020-02-07
16:41
PS Ripple Study during the 2019 Fermilab Booster Experiment / Schmidt, Frank (CERN) ; Eldred, Jeffrey (FERMILAB) ; Jensen, Chris (FERMILAB) ; Larson, Jeffrey (FERMILAB) ; Triplett, Kent A (FERMILAB)
S.02 has been one of the experiments of the 2019 Fermilab Booster Studies. [...]
CERN-ACC-2020-0007.
- 2020. - 25 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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2020-01-27
13:16
Localization of vacuum breakdown locations in RF structures using S-parameter data / WU, Chien Hung (the University of Oxford (GB)) ; Paszkiewicz, Jan (University of Oxford (GB))
This project is an investigation to find the breakdown locations using a new method involving group delays of the Scattering parameters (or S-parameters). [...]
CERN-ACC-2020-0006 ; CLIC-Note-1157.
- 2019. - 13 p.
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