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2021-01-15
11:59
Space charge and intrabeam scattering effects for Lead-ions and Oxygen-ions in the LHC injector chain / John, Isabelle (Lund University (SE)) ; Bartosik, Hannes (CERN)
In the context of a possible LHC run with Oxygen-ion beams in about 2023, this report presents results of the space charge and intrabeam scattering effects for the Oxygen beam in comparison to the operational Lead beam in the LHC ion-injector chain (LEIR, PS and SPS). [...]
CERN-ACC-NOTE-2021-0003. - 2021. - 31 p.

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2021-01-14
10:23
Different approaches for minimising proton beam losses on the 11 T dipole in the IR7 dispersion suppressor / Belli, Eleonora ; Bruce, Roderik (CERN) ; Giovannozzi, Massimo (CERN) ; Mereghetti, Alessio ; Mirarchi, Daniele (CERN) ; Redaelli, Stefano (CERN)
The High Luminosity Large Hadron Collider (HL–LHC) project aims at increasing the integrated luminosity by a factor of 10 beyond the LHC design value. [...]
CERN-ACC-NOTE-2021-0002. - 2021.

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2020-12-18
17:08
Introduction to the BE-CO Control System / Deghaye, Stephane (CERN) ; Fortescue-Beck, Eve (CERN)
The document is an attempt to fill the gap between the Control System, as provided by the Beams Controls (BE-CO) group, and anybody who needs to work with the Control System [...]
CERN-ACC-NOTE-2020-0069. - 2020. - 195 p.
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2020-12-18
11:44
Comparison of Accelerator Designs for an Ion Therapy and Research Facility / Benedetto, Elena (TERA Foundation (IT)) ; Amaldi, Ugo (TERA Foundation (IT)) ; Bencini, Vittorio (TERA Foundation (IT)) ; Dosanjh, Manjit ; Foka, Yiota (GSI - Helmholtzzentrum fur Schwerionenforschung GmbH (DE)) ; Kaprinis, Dimitris ; Khalvati, Mohammad Reza (Institute for Research in Fundamental Sciences (IR)) ; Lombardi, Alessandra (CERN) ; Sapinski, Mariusz (TERA Foundation (IT)) ; Vretenar, Maurizio (CERN) et al.
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CERN-ACC-NOTE-2020-0068 ; NIMMS-Note-001. - 2020. - 46 p.
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2020-12-16
17:36
Extracting chromatic properties of electron beams from spectral analysis of turn-by-turn beam position data / Zisopoulos, Panagiotis (Uppsala University (SE)) ; Papaphilippou, Yannis (CERN)
A method to estimate linear chromaticity, RMS energy spread, and chromatic beta-beating, directly from turn-by-turn beam position data in a circular electron accelerator, is presented. [...]
CERN-ACC-NOTE-2020-0067. - 2020. - 27 p.
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2020-12-16
17:32
New Ideas for the MAD-X Aperture Calculation / Risselada, Thys
If a beam screen shape is made up of straight and circular segments the N1 values may be calculated exactly for each segment by a simple geometric construction..
CERN-ACC-NOTE-2020-0066. - 2020. - 11 p.
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2020-12-16
17:28
LHC MD 4505: Forced 3D beam oscillations / Malina, Lukas (CERN) ; Tomas Garcia, Rogelio (CERN) ; Timko, Helga (CERN) ; Louro Alves, Diogo Miguel (CERN) ; Coello De Portugal - Martinez Vazquez, Jaime Maria
This note summarises the detailed programme of an MD testing the new chromaticity and fast optics measurement methods. [...]
CERN-ACC-NOTE-2020-0065. - 2020. - 14 p.
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2020-12-10
17:53
Resonance driving terms and tune spread with amplitude driven a beam-beam long range kick and a DC wire kick / Skoufaris, Kyriacos (University of Crete (GR)) ; Sterbini, Guido (CERN) ; Papaphilippou, Yannis (CERN)
This document presents in detail the derivation of the formulas that describe the resonance driving terms and the tune spread with amplitude generated by the beam-beam long range interactions and the DC wire compensators in cyclical machines. [...]
CERN-ACC-NOTE-2020-0064. - 2020. - 21 p.

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2020-12-07
10:16
RESULTS OF THE STRIPPING FOIL MEASUREMENTS LINAC4 WEEK 36 & 48 2020 / Bracco, Chiara (CERN) ; Jorat, Louise Olivia (CERN) ; Noulibos, Remy (CERN) ; Renner, Elisabeth (Vienna University of Technology (AT)) ; Van Trappen, Pieter (CERN) ; Weterings, Wim (CERN)
The 160 MeV H− beam from the Linac4 (L4) linear accelerator at CERN will be injected into the Proton Synchrotron Booster (PSB) with a new H− charge-exchange injection system. [...]
CERN-ACC-NOTE-2020-0063. - 2020. - 4 p.
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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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