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ATS UNCLASSIFIED

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2023-05-19
11:06
HL-LHC Crab Cavity Field Regulation and Resulting RF Noise Spectrum / Baudrenghien, Philippe (CERN) ; Mastoridis, Themistoklis (California Polytechnic State Univ. (US))
The HL-LHC Low Level RF (LLRF) must fulfill three requirements: it must reduce the cavity impedance at the fundamental below the instability threshold, it must regulate the crab cavity voltage precisely (amplitude and phase), and it must provide a cavity field with a spectral purity resulting in negligible degradation of the integrated luminosity due to transverse emittance growth. [...]
CERN-ACC-NOTE-2023-0006. - 2023.
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2023-04-24
12:04
Machine Configuration for the 2023 Proton Run (MD7003) / Fartoukh, Stephane (CERN) ; Dilly, Joschua Werner (CERN) ; Hostettler, Michi (CERN) ; Iadarola, Giovanni (CERN) ; Jacquet, Delphine (CERN) ; Kostoglou, Sofia (CERN) ; Mirarchi, Daniele (CERN) ; Persson, Tobias Hakan Bjorn (CERN) ; Solfaroli Camillocci, Matteo (CERN) ; Sterbini, Guido (CERN) et al.
This note contains a condensed summary of the various beam tests which took place in 2022 in order to validate the machine configuration planned to be deployed for the 2023 proton run of the LHC, including in particular a combined ramp and anti-telescopic squeeze, the rotation of the external crossing angle in LHCb, and beam operation with up to 1.8 × 1011 p/b..
CERN-ACC-NOTE-2023-0005. - 2023.
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2023-04-11
15:01
Amplitude Detuning from Nonlinear-Corrector- and Triplet-Misalignments at flat-orbit in the LHC and HL-LHC / Dilly, Joschua Werner (CERN) ; Maclean, Ewen Hamish (CERN) ; Tomas Garcia, Rogelio (CERN)
Feed-down effects from high-order magnetic fields can have a detrimental impact on beam stability and lifetime in the LHC. [...]
CERN-ACC-NOTE-2022-0078. - 2022.
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2023-04-11
11:10
Determination of BLM conversion factors for collimators scans / Gorzawski, Arkadiusz (ESS - European Spallation Source (SE)) ; Giovannozzi, Massimo (CERN)
This note summarises the results of a study related to a method used to obtain the conversion factor to calibrate in protons/s the signals measured in Gy/s by the BLM system during the collimator scans. [...]
CERN-ACC-NOTE-2022-0077. - 2022. - 9 p.
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2023-03-30
15:48
Assessing the Usefulness of Assurance Cases: an Experience with the CERN Large Hadron Collider / Rees, Chris (Critical Systems Labs) ; Delgado, Mateo (Critical Systems Labs) ; Lippelt, Rolf (Critical Systems Labs) ; Joyce, Jeff (Critical Systems Labs) ; Diemert, Simon (Critical Systems Labs) ; Menghi, Claudio (McMasters University) ; Viger, Torin (University of Toronto) ; Chechik, Marsha (University of Toronto) ; Uythoven, Jan (CERN) ; Zerlauth, Markus (CERN) et al.
Assurance cases are structured arguments designed to show that a system functions properly in its operational environment. [...]
CERN-ACC-2023-0002. - 2023.
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2023-02-10
14:34
Isotope production induced by 1.4 GeV PS Booster: reaction channels identified from secondary particle fields in thick targets / Duchemin, Charlotte (CERN) ; Cerutti, Francesco (CERN) ; Rothe, Sebastian (CERN) ; Salvat Pujol, Francesc (CERN) ; Stora, Thierry (CERN) ; Vollaire, Joachim (CERN)
This note describes systematic investigations of isotope production channels in thick targets exposed to the PS Booster (PSB) beam at ISOLDE. [...]
CERN-ACC-NOTE-2023-0004. - 2023. - 8 p.
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2023-02-07
17:53
High Energy LHC Machine Options in the LHC Tunnel / Bottura, Luca (CERN) ; Zimmermann, Frank (CERN)
The LHC infrastructure, i.e. [...]
CERN-ACC-2023-0001. - 2023. - 20 p.
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2023-02-07
10:54
PRODUCTION OF RADIOISOTOPES FOR CANCER IMAGING AND TREATMENT WITH COMPACT LINEAR ACCELERATORS / Vretenar, Maurizio (CERN) ; Mamaras, Aristeidis (Aristotle University of Thessaloniki (GR)) ; Bisoffi, Giovanni (Universita e INFN, Legnaro (IT)) ; Foka, Yiota (GSI - Helmholtzzentrum fur Schwerionenforschung GmbH (DE))
Accelerator-produced radioisotopes are widely used inmodern medicine, for imaging, for cancer therapy, and for combinations of therapy and diagnostics (theragnostics). [...]
CERN-ACC-NOTE-2023-0003 ; NIMMS-Note-0012. - 2023. - 6 p.
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2023-01-30
17:39
Beam optics upgrade for radio frequency quadrupole in LINAC4 project at CERN / Kumar, Sarvesh (Inter-University Accelerator Center IUAC (IN)) ; Bellodi, Giulia (CERN) ; Grudiev, Alexej (CERN) ; Lombardi, Alessandra (CERN) ; Pommerenke, Hermann Winrich
In the framework of the Spare Radio Frequency Quadrupole Project [1] the layout of an enhanced performance RFQ has been explored [...]
CERN-ACC-NOTE-2023-0002. - 2023. - 7 p.
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2023-01-27
14:13
The Effect of Ground Motion on the LHC and HL--LHC Beam Orbit / Schaumann, Michaela ; Gamba, Davide (CERN) ; Garcia Morales, Hector ; Corsini, Roberto (CERN) ; Guinchard, Michael (CERN) ; Scislo, Lukasz Grzegorz (Tadeusz Kosciuszko Cracow University of technology (PL)) ; Wenninger, Jorg (CERN)
The High Luminosity Large Hadron Collider (HL--LHC) will require unprecedented orbit stability at the low-beta experiments, ATLAS and CMS [...]
CERN-ACC-NOTE-2022-0076. - 2022. - 32 p.
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