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2020-12-02
15:54
RF Measurements and Tuning of the PIXE-RFQ / Pommerenke, Hermann Winrich (CERN) ; Grudiev, Alexej (CERN)
CERN has built a 750 MHz radio-frequency quadrupole (RFQ), called PIXE-RFQ, for proton-induced X-ray emission analysis (PIXE) of cultural heritage artwork. [...]
CERN-ACC-NOTE-2020-0062. - 2020. - 66 p.

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2020-11-30
16:35
Operating Parameters of High Power RF Systems in Particle Accelerators based on Equivalent Circuit Analysis. / Ciapala, Edmond
This tutorial style publication covers elementary design and performance of high power RF systems in particle accelerators. [...]
CERN-ACC-NOTE-2020-0061. - 2020. - 32 p.

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2020-11-26
12:42
Dynamic simulations and transient management of the HL-LHC cryogenic system during beam operation / Bradu, Benjamin (CERN)
This paper presents a set of dynamic simulations performed on the future High Luminosity Large Hadron Collider (HL-LHC) cryogenic system. [...]
CERN-ACC-NOTE-2020-0060. - 2020. - 36 p.
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2020-11-24
11:33
Strategy for Landau damping of head-tail instabilities at top energy in the HL-LHC / Buffat, Xavier (CERN) ; Antipov, Sergey ; Arduini, Gianluigi (CERN) ; De Maria, Riccardo (CERN) ; Karastathis, Nikos ; Kostoglou, Sofia (CERN) ; Koval, Adam (University of Dundee (GB)) ; Maclean, Ewen Hamish (CERN) ; Mounet, Nicolas (CERN) ; Papaphilippou, Yannis (CERN) et al.
The main aspects linked to Landau damping of head-tail instabilities at top energy in the HL-LHC are discussed, in particular the interplay between the arc octupoles and long-range, offset or head-on beam-beam interactions as well as lattice imperfections. [...]
CERN-ACC-NOTE-2020-0059. - 2020. - 28 p.
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2020-11-24
11:26
Study of the Effect of Detuning Impedance on Beam Stability / Chitnis, Ninad (ETH Zurich (CH)) ; Zannini, Carlo (CERN) ; Mounet, Nicolas (CERN) ; Rumolo, Giovanni (CERN)
The impact of the detuning impedance on the stability of a particle beam is a relatively less studied phenomenon compared to the usual case of considering only the driving impedance [...]
CERN-ACC-NOTE-2020-0058. - 2020. - 39 p.
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2020-10-27
17:01
Impact and possible mitigation measures in case of failure of lattice sextupole and octupole circuits in Run 3 / Fartoukh, Stephane (CERN)
Depending on the machine configuration which is used in operation, the failure of some lattice sextupole and octupole circuits might have a substantial impact on the machine performance (β∗ and beam brightness limitations). [...]
CERN-ACC-NOTE-2020-0057. - 2020. - 25 p.
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2020-10-27
16:18
MD2490 – Measurement of the TMCI threshold at flat-top in the LHC / Albert, Markus (CERN) ; Amorim, David (Universite Grenoble-Alpes (FR)) ; Antipov, Sergey ; Biancacci, Nicolo (CERN) ; Buffat, Xavier (CERN) ; Carver, Lee Robert (University of Liverpool (GB)) ; Fuchsberger, Kajetan ; Mereghetti, Alessio ; Metral, Elias (CERN) ; Mounet, Nicolas (CERN) et al.
This report summarizes the results of MD2490 on the measurement of the intensity threshold of the Transverse Mode Coupling Instability (TMCI) in the LHC at flat top. [...]
CERN-ACC-NOTE-2020-0056. - 2020.
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2020-10-20
11:31
Simulation and Measurement Report for the SPS BTV / Farricker, Aaron (University of Liverpool (GB)) ; Kramer, Patrick (CERN) ; Vollinger, Christine (CERN)
The SPS BTV is an integral part of the new beam dump area of the the SPS installed in LSS5 during LS2. [...]
CERN-ACC-NOTE-2020-0055. - 2020. - 7 p.
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2020-10-06
17:58
A Vlasov approach to study transverse instabilities driven by electron clouds / Iadarola, Giovanni (CERN) ; Mether, Lotta (CERN) ; Mounet, Nicolas (CERN) ; Sabato, Luca
We present a linearized method to study transverse instabilities due to electron clouds. [...]
CERN-ACC-NOTE-2020-0054. - 2020. - 22 p.
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2020-10-06
17:47
MD3310 – Complex tune shift measurement at flat-top in the LHC / Amorim, David (Universite Grenoble-Alpes (FR)) ; Antipov, Sergey ; Biancacci, Nicolo (CERN) ; Buffat, Xavier (CERN) ; Giordano, Francesco (Universita e sezione INFN di Napoli (IT)) ; Hemelsoet, Georges-Henry (CERN) ; Levens, Tom (CERN) ; Metral, Elias (CERN) ; Mounet, Nicolas (CERN) ; Ribes Metidieri, Ariadna (University of Barcelona (ES)) et al.
This note summarises the MD3310 activity. [...]
CERN-ACC-NOTE-2020-0053. - 2020. - 6 p.
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LHC MD Notes (160)