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2020-05-14
10:09
A Mathematica Notebook for the calculation of the anomalous skin effect in copper / Calatroni, Sergio (CERN)
This Mathematica Notebook allows calculating the RF surface impedance of copper, in the normal and anomalous skin effect regimes, for any value of frequency, temperature and magnetic field (thus including magnetoresistance effects). [...]
CERN-ACC-NOTE-2020-0029. - 2020. - 11 p.
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2020-01-10
17:30
Deliverable 2.10: Summary of the observations in the SPS and update of the estimates for HL-LHC / Alekou, Androula (University of Manchester (GB)) ; Antoniou, Fanouria (CERN) ; Appleby, Robert Barrie (University of Manchester (GB)) ; Bartosik, Hannes (CERN) ; Calaga, Rama (CERN) ; Carla', Michele (CERN) ; Carver, Lee Robert (University of Liverpool (GB)) ; Papaphilippou, Yannis (CERN) ; Welsch, Carsten Peter (University of Liverpool (GB))
Over the course of 2018, 7 machine developments were conducted for dedicated crab cavity measurements with each measurement slot consisting of 10 hours of SPS machine time. [...]
CERN-ACC-2020-0002. - 2020. - 22 p.
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2020-01-10
17:18
Deliverable 2.7: Analysis of the existing sources of blow-up in the SPS by experiments and estimation/measurement of the effect of the crab cavities in the SPS / Alekou, Androula (University of Manchester (GB)) ; Antoniou, Fanouria (CERN) ; Appleby, Robert Barrie (University of Manchester (GB)) ; Bartosik, Hannes (CERN) ; Calaga, Rama (CERN) ; Carla', Michele (CERN) ; Carver, Lee Robert (University of Liverpool (GB)) ; Papaphilippou, Yannis (CERN) ; Welsch, Carsten Peter (University of Liverpool (GB))
The Crab Cavities (CCs) may induce emittance growth, driven by phase and amplitude jitter, and lead to a degradation of the High Luminosity LHC (HL-LHC) beam. [...]
CERN-ACC-2020-0001. - 2020. - 18 p.
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2019-05-29
15:16
Optimal positioning of a single local magnetic sensor for integrated dipole measurements / Grech, Christian (University of Malta (MT)) ; Buzio, Marco (CERN) ; Russenschuck, Stephan (CERN) ; Schwarz, Philip (CERN) ; Golluccio, Giancarlo (GSI - Helmholtzzentrum fur Schwerionenforschung GmbH (DE))
In this report, we seek the optimal position inside a dipole magnet where a single, small magnetic field sensor such as a Hall probe should be installed to derive with best accuracy the field integral along the magnet’s axis. [...]
CERN-ACC-NOTE-2019-0020. - 2019. - 48 p.
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2019-01-15
09:36
Magnetic Frequency Response of High-Luminosity Large Hadron Collider Beam Screens / Morrone, Marco (CERN, Imperial College London) ; Martino, Michele (CERN) ; De Maria, Riccardo (CERN) ; Fitterer, Miriam (FNAL) ; Garion, Cedric (CERN)
Magnetic fields used to control particle beams in accelerators are usually controlled by regulating the electrical current of the power converters. [...]
CERN-ACC-2019-0004. - 2019. - 22 p.
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2018-05-31
13:49
Crab Cavity effects on transverse distribution evolution and tail cleaning in the HL-LHC / Baudrenghien, Philippe (CERN) ; Mastoridis, Themistoklis (California Polytechnic State Univ. (US)) ; Steeper, S (California Polytechnic State Univ. (US)) ; Tucker, D (California Polytechnic State Univ. (US)) ; Wieker, Devin (California Polytechnic State Univ. (US))
This work presents the transverse action and tune distribution evolution as a function of the Crab Cavity RF noise Power Spectral Density (PSD). [...]
CERN-ACC-NOTE-2018-0042. - 2018. - 10 p.
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2018-05-28
13:13
SRF cavity testing using a FPGA Self Excited Loop / Ben-Zvi, Ilan (Brookhaven National Laboratory (US))
This document provides a detailed description of procedures for very-high precision calibration and testing of superconducting RF cavities using digital Low-Level RF (LLRF) electronics based on Field Programmable Gate Arrays (FPGA). [...]
CERN-ACC-NOTE-2018-0039. - 2018. - 36 p.
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2018-03-26
16:45
Magnetic Field Measurements of the GOLIATH Magnet in EHN1 / Rosenthal, Marcel (CERN) ; Charitonidis, Nikolaos (CERN) ; Chatzidaki, Panagiota ; Margraf, Rachel ; Wilkens, Henric (CERN) ; Bergsma, Felix (CERN) ; Giudici, Pierre-Ange (CERN)
This note describes the measurement campaign of the magnetic field of the GOLIATH magnet conducted in 2017. [...]
CERN-ACC-NOTE-2018-0028. - 2018. - 20 p.
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2018-02-28
09:38
LHC MD 2042: Persistent Injection Oscillations / Karpov, Ivan (CERN) ; Albright, Simon (CERN) ; Argyropoulos, Theodoros (CERN) ; Baudrenghien, Philippe (CERN) ; Chapochnikova, Elena (CERN) ; Timko, Helga (CERN)
This MD note summarizes the measurements performed to study persistent longitudinal oscillations after injection into the LHC. [...]
CERN-ACC-NOTE-2018-0018. - 2018.
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2017-06-30
16:00
Comparison of coaxial higher order mode couplers for the CERN Superconducting Proton Linac study / Papke, Kai (CERN ; Rostock U.) ; Gerigk, Frank (CERN) ; Van Rienen, Ursula (Rostock U.)
Higher order modes (HOMs) may affect beam stability and refrigeration requirements of superconducting proton linacs such as the Superconducting Proton Linac, which is studied at CERN. Under certain conditions beam-induced HOMs can accumulate sufficient energy to destabilize the beam or quench the superconducting cavities. [...]
CERN-ACC-2017-0050.- Geneva : CERN, 2017 - 19 p. - Published in : Phys. Rev. Accel. Beams 20 (2017) 060401 Fulltext: PDF;

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