CERN Accelerating science

Accelerators & Technology Sector Notes

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Algorithms for Tune Estimation and Damper Control / Menor De Onate, Adrian (Delft University of Technology (NL)) ; Kotzian, Gerd (CERN)
This Project within an internship in the radio frequency group aims to explore different methods of extracting the tune from transverse feedback and pick-up data streams. [...]
- 2023. - 27 p.
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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. [...]
- 2023.
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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..
- 2023.
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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. [...]
- 2022.
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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. [...]
- 2022. - 9 p.
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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. [...]
- 2023. - 8 p.
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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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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 [...]
- 2023. - 7 p.
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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 [...]
- 2022. - 32 p.
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Short Summaries of the ATS Seminars in 2022 / Metral, Elias (CERN) ; Dallocchio, Alessandro (CERN) ; Modena, Michele (CERN) ; Stora, Thierry (CERN)
Seven ATS seminars took place in 2022 ( [...]
- 2023. - 11 p.
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LHC MD Notes (173)