CERN Accelerating science

Accelerator Physics

Collimation-induced experimental background studies at the CERN Large Hadron Collider / Bruce, R (CERN) ; Huhtinen, M (CERN) ; Manousos, A (CERN ; Innsbruck U. ; Aristotle U., Thessaloniki) ; Cerutti, F (CERN) ; Esposito, L (CERN) ; Kwee-Hinzmann, R (Royal Holloway, U. of London) ; Lechner, A (CERN) ; Mereghetti, A (CERN) ; Mirarchi, D (CERN) ; Redaelli, S (CERN) et al.
The data produced at the particle physics experiments at the Large Hadron Collider (LHC) contain not only the signals from the collisions, but also a background component from proton losses around the accelerator. Understanding, identifying and possibly mitigating this machine-induced background is essential for an efficient data taking, especially for some new physics searches. [...]
2019 - 18 p. - Published in : Phys. Rev. Accel. Beams 22 (2019) 021004 Fulltext from Publisher: PDF;

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Mode coupling instability of colliding beams in the HL-LHC / Barraud, Laurent (Johann-Wolfgang-Goethe Univ. (DE)) ; Buffat, Xavier (CERN)
The coupling between the coherent beam-beam modes and the head-tail modes can result in strong instabilities under the effect of electromagnetic wake fields [...]
- 2019. - 19 p.
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Numerical and experimental studies to model and reduce the impedance in the CERN Super Proton Synchrotron (SPS) / Beck, Mario
Intensity-driven beam instabilities are studied in simulations with a refined impedance model and in experimental measurements for this thesis [...]
CERN-THESIS-2018-433 - 181 p.

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Emittance growth in collision with optimised ADT settings (MD3291) / Buffat, Xavier (CERN) ; Furuseth, Sondre (EPFL - Ecole Polytechnique Federale Lausanne (CH)) ; Valuch, Daniel (CERN) ; Soderen, Martin (CERN) ; Komppula, Jani Paavo Olavi
A short end of fill experiment, aiming at evaluating the variation of the emittance growth rate on operational beams in collision when reducing the bandwidth of the transverse damper, is described in this note [...]
- 2019. - 6 p.
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Intensity dependance of the train instability threshold and high pile-up test with 12b trains (MD3294) / Buffat, Xavier (CERN) ; Amorim, David (Universite Grenoble-Alpes (FR)) ; Antipov, Sergey (CERN) ; Bartosik, Hannes (CERN) ; Crockford, Guy (CERN) ; Furuseth, Sondre (EPFL - Ecole Polytechnique Federale Lausanne (CH)) ; Iadarola, Giovanni (CERN) ; Levens, Tom (CERN) ; Metral, Elias (CERN) ; Mounet, Nicolas (CERN) et al.
As signs of electron cloud driven instabilities at top energy were observed in MDs in 2017 even with short trains(12b), an additional experiment was performed in 2018 to assess the intensity scaling of this instability mechanism using high intensity 12b trains available from the existing injector chain, i.e [...]
- 2019. - 8 p.
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Noise studies with new ADT pickups (MD4143) / Buffat, Xavier (CERN) ; Albert, Markus (CERN) ; Amorim, David (Universite Grenoble-Alpes (FR)) ; Antipov, Sergey (CERN) ; Crockford, Guy (CERN) ; Furuseth, Sondre (EPFL - Ecole Polytechnique Federale Lausanne (CH)) ; Komppula, Jani Paavo Olavi ; Kotzian, Gerd (CERN) ; Mounet, Nicolas (CERN) ; Oeftiger, Adrian (GSI - Helmholtzzentrum fur Schwerionenforschung GmbH (DE)) et al.
An experiment aiming at characterizing the performance of a new engineering prototype for the ADT pickup readout electronics with a low noise floor from the point of view of beam stability and emittance growth in collision is described in this note [...]
- 2019. - 12 p.
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Future circular collider injection and extraction kicker topologies and solid state generators / Barnes, M J (CERN) ; Bartmann, W (CERN) ; Burkart, F (CERN) ; Ducimetière, L (CERN) ; Goddard, B (CERN) ; Kramer, T (CERN) ; Senaj, V (CERN) ; Stadlbauer, T (CERN) ; Woog, D (CERN) ; Barna, D (Wigner RCP, Budapest) et al.
A 100 TeV center-of-mass energy frontier proton collider, in a new tunnel of 80–100 km circumference, is a central part of CERN’s Future Circular Colliders (FCC) design study. The designs of the injection and extraction systems of the FCC are initially based upon the parameters of the injection and extraction systems of the Large Hadron Collider and a preliminary study of the FCC beam optics and lattice. [...]
2019 - 12 p. - Published in : Phys. Rev. Accel. Beams 22 (2019) 071001 Fulltext: PDF;

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Cover not available Synchrotron light sources and free-electron lasers : accelerator physics, instrumentation and science applications / Jaeschke, Eberhard (ed.) ; Khan, Shaukat (ed.) ; Schneider, Jochen (ed.) ; Hastings, Jerome (ed.)
Hardly any other discovery of the nineteenth century did have such an impact on science and technology as Wilhelm Conrad Röntgen’s seminal find of the X-rays [...]
Cham : Springer, 2019.

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The SPS and an alternative ring design as pre-booster of FCC $e^+e^−$ injector / Etisken, O (CERN ; Ankara U.) ; Papaphilippou, Y (CERN) ; Antoniou, F (CERN) ; Ciftci, A K (Izmir U. Economics, Izmir)
The FCC-e+ e− injector complex needs to produce and to transport a high-intensity e+/e− beam at a fast repetition rate for topping up the collider at its collision energy. Two different options are under consideration as pre-accelerator before the bunches are transferred to the high-energy booster: using the existing SPS and a completely new ring. [...]
2018 - 6 p. - Published in : AIP Conf. Proc. 2042 (2018) 020043
In : 34th International Physics Congress of the Turkish Physical Society, Bodrum, Turkey, 5 - 9 Sep 2018, pp.020043

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HGS-HIRe Lecture Week on Accelerator Physics & Technology: Intensity limitations in ion beams / Metral, Elias (CERN)
This lecture week was given together with Ingo Hofmann (GSI-FAIR) and Giovanni Rumolo (CERN) from June 24th to 28th, 2019, in Laubach, Germany ( [...]
- 2019.
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