CERN Accelerating science

Accelerator Physics

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2017-06-22
15:00
Path to AWAKE: Evolution of the concept / Caldwell, A (Max Planck Institute for Physics, Munchen, DE) ; Adlia, E (STFC Daresbury Lab, Warrington, UK and DESY, hamburg, DE) ; Amorimj, L (GoLP, Universisade de Lisboa, Lisbon, PT) ; Apsimon, R (Cockcroft Institute, Warrington, UK and Lancaster University, Lancaster, UK) ; Argyropoulos, T (CERN, Geneva, CH) ; Assmann, R (DESY, Hamburg, DE) ; Bachmann, A.M (Max Planck Institute for Physics, Munchen, DE) ; Batsch, F (Max Planck Institute for Physics, Munchen, DE) ; Bauche, J (CERN, Geneva, CH) ; Berglyd Olsen, V.K (STFC Daresbury Lab, Warrington, UK and DESY, Hamburg, DE) et al.
This report describes the conceptual steps in reaching the design of the AWAKE experiment currently under construction at CERN. We start with an introduction to plasma wakefield acceleration and the motivation for using proton drivers. [...]
CERN-ACC-2016-0348.- Geneva : CERN, 2016 - Published in : Nuclear Instruments and methods in Physics Research: A (2016) , no. 829 Fulltext: PDF;

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2017-06-17
07:13
Fundamental cavity impedance and longitudinal coupled-bunch instabilities at the High Luminosity Large Hadron Collider / Baudrenghien, P (CERN) ; Mastoridis, T (Cal. Poly.)
The interaction between beam dynamics and the radio frequency (rf) station in circular colliders is complex and can lead to longitudinal coupled-bunch instabilities at high beam currents. The excitation of the cavity higher order modes is traditionally damped using passive devices. [...]
2017 - 13 p. - Published in : Phys. Rev. Accel. Beams 20 (2017) 011004 Fulltext: PDF;

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2017-06-17
07:13
Electromagnetic characterization of nonevaporable getter properties between 220–330 and 500–750 GHz for the Compact Linear Collider damping rings / Koukovini-Platia, E (CERN ; EPFL-ISIC, Lausanne) ; Rumolo, G (CERN) ; Zannini, C (CERN)
Due to its effective pumping ability, nonevaporable getter (NEG) coating is considered for the vacuum chambers of the Compact Linear Collider (CLIC) electron damping rings (EDR). The aim is to suppress fast beam ion instabilities. [...]
2017 - 8 p. - Published in : Phys. Rev. Accel. Beams 20 (2017) 011002 Fulltext: PDF;

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2017-06-17
07:13
Flexibility of LHC Optics for Forward Proton Measurements / Cieśla, Krzysztof (Cracow Tech. U.) ; Staszewski, Rafal (Cracow, INP)
The geometric acceptance of the ATLAS Forward Proton detectors is studied. The elements of the LHC magnetic lattice that are most important for the acceptance are identified. [...]
2016 - 6 p. - Published in : Acta Phys. Pol. B 47 (2016) 1633 Fulltext: PDF;
In : 22th Cracow EPIPHANY Conference on the Physics in LHC Run2, Cracow, Poland, 7 - 9 Jan 2016, pp.1633

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2017-06-16
14:53
Beam Measurements of the Longitudinal impedance of the CERN Super Proton Synchrotron / Lasheen, Alexandre
One of the main challenges of future physics projects based on particle accelerators is the need for high intensity beams [...]
CERN-THESIS-2017-068 - 134 p.

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2017-06-16
07:09
Review of linear optics measurement and correction for charged particle accelerators / Tomás, Rogelio (CERN) ; Aiba, Masamitsu (PSI, Villigen) ; Franchi, Andrea (ESRF, Grenoble) ; Iriso, Ubaldo (CELLS - ALBA, LLS)
Measurement and correction of charged particle beam optics have been a major concern since the advent of strong focusing synchrotron accelerators. Traditionally, particle colliders have led the development of optics control based on turn-by-turn beam centroid measurements, while lepton storage rings have focused on closed-orbit-response matrix techniques. [...]
2017 - 16 p. - Published in : Phys. Rev. Accel. Beams 20 (2017) 054801 Fulltext: PDF;

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2017-06-16
07:09
Machine detector interface studies: Layout and synchrotron radiation estimate in the future circular collider interaction region / Boscolo, Manuela (Frascati) ; Burkhardt, Helmut (CERN) ; Sullivan, Michael (SLAC)
The interaction region layout for the $e^+e^-$ future circular collider FCC-ee is presented together with a preliminary estimate of synchrotron radiation that affects this region. We describe in this paper the main guidelines of this design and the estimate of synchrotron radiation coming from the last bending magnets and from the final focus quadrupoles, with the software tools developed for this purpose. [...]
2017 - 7 p. - Published in : Phys. Rev. Accel. Beams 20 (2017) 011008 Fulltext: PDF;

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2017-06-15
16:47
Field-reversed bubble in deep plasma channels for high quality electron acceleration / Pukhov, A (Dusseldorf Universitaet) ; Jansen, O (Dusseldorf Universitaet) ; Tueckmantel, T (Dusseldorf Universitaet) ; Thomas, J (Dusseldorf Universitaet) ; Yu, I (University of Nizhni Novorogod) ; Kostyukov, Yu (University of Nizhni Novorogod and IAP RAS, Nizhni Novorogod)
We study hollow plasma channels with smooth boundaries for laser-driven electron acceleration in the bubble regime. Contrary to the uniform plasma case, the laser forms no optical shock and no etching at the front. [...]
CERN-ACC-2014-0361.- Geneva : CERN, 2014 - Published in : Phys. Rev. Letter: 113 (2014) , no. 245003 Fulltext: PDF;

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2017-06-15
10:30
Injection of electrons by colliding laser pulses in a laser wakefield accelerator / Hansson, Martin (Lund University) ; Aurand, Bastian (Lund University) ; Ekerfelt, Henrik (Lund University) ; Persson, Anna (Lund University) ; Lundh, Olle (Lund University)
To improve the stability and reproducibility of laser wakefield accelerators and to allow for future applications, controlling the injection of electrons is of great importance. This allows us to control the amount of charge in the beams of accelerated electrons and final energy of the electrons. [...]
CERN-ACC-2016-0347.- Geneva : CERN, 2016 - Published in : Nucl. Instrum. Methods Phys. Res., A 829 (2016) 99-103 Fulltext: PDF;

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2017-06-15
06:39
Toward a new paradigm in quench detection for superconducting magnets? ‘Quench detection for high temperature superconductor magnets: a novel technique based on Rayleigh-backscattering interrogated optical fibers (RIOF)’ / Rossi, Lucio (CERN)
This is a viewpoint on the letter by F Scurti et al (2016 Supercond. Sci [...]
2016 - Published in : Supercond. Sci. Technol. 29 (2016) 060501

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