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Senast inlagda poster:
2017-06-23
09:44
Mechanical Effects of the Non-Uniform Current Distribution on HTS Coils for Accelerators Wound with REBCO Roebel Cable / Murtomaeki, Jaako (CERN, Geneva, CH and TUT, Tampere, FI) ; van Nugteren, Jeroen (CERN, Geneva, CH and Twente University, NL) ; Kirby, Glen (CERN, Geneva, CH) ; Rossi, Lucio (CERN, Geneva, CH) ; Ruuskanen, Janne (Twente University, NL) ; Stenvall, Antti (Twente University, NL) ; Murtomaeki, Jaako (dir.) (TUT, Tampere, Finland and CERN, Geneva, CH)
Future high-energy accelerators will need very high magnetic fields in the range of 20 T. The EuCARD-2 WP10 Future Magnets collaboration is aiming at testing HTS-based Roebel cables in an accelerator magnet. [...]
CERN-ACC-NOTE-2017-0045.- Geneva : CERN, 2017 Fulltext: PDF;

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2017-06-22
11:29
Vol. 45 - Final EuCARD-2 Project Report / Vretenar, Maurizio (CERN)
CERN-ACC-2017-0049.- Geneva : CERN, 2017 Fulltext: PDF;

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2017-06-15
17:10
Quantitative single shot and spatially resolved plasma wakefield diagnostics / Kasim, Muhammad Firmansyah (John Adams Institute, Oxford) ; Holloway, James (John Adams Institute, Oxford) ; Ceurvorst, Luke (Clarendon Laboratory, University of Oxford) ; Levy, Matthew C (Clarendon Laboratory, University of Oxford) ; Ratan, Naren (Clarendon Laboratory, University of Oxford) ; Sadler, James (Clarendon Laboratory, University of Oxford) ; Bingham, Robert (STFC, Rutherford Appleton laboratory, Didcot and University of Strathclyde, Glasgow) ; Burrows, Philip N (John Adams Institute, Oxford) ; Trines, Raoul (STFC, Rutherford Appleton laboratory, Didcot) ; Wing, Matthew (University College London) et al.
Diagnosing plasma conditions can give great advantages in optimizing plasma wakefield accelerator experiments. One possible method is that of photon acceleration. [...]
CERN-ACC-2015-0379.- Geneva : CERN, 2015 - Published in : 10.1103/PhysRevSTAB.18.081302 Fulltext: PDF;

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2017-06-15
16:58
Simulation of density measurements in plasma wakefields using photo acceleration / Kasim, Muhammad Firmansyah (John Adams Institute, Oxford) ; Ratan, Naren (Clarendon Lab, Oxford University) ; Ceurvorst, Luke (Clarendon Lab, Oxford University) ; Sadler, James (Clarendon Lab, Oxford University) ; Burrows, Philip N (John Adams Institute, Oxford) ; Trines, Raoul (STFC Rutherford Appleton Lab, Didcot) ; Holloway, James (University College London) ; Wing, Matthew (University College London) ; Bingham, Robert (STFC Rutherford Appleton Lab, Didcot) ; Norreys, Peter (Oxford University and STFC Rutherford Appleton Lab, Didcot)
One obstacle in plasma accelerator development is the limitation of techniques to diagnose and measure plasma wakefield parameters. In this paper, we present a novel concept for the density measurement of a plasma wakefield using photon acceleration, supported by extensive particle in cell simulations of a laser pulse that copropagates with a wakefield. [...]
CERN-ACC-2015-0378.- Geneva : CERN, 2015 - Published in : 10.1103/PhysRevSTAB.18.032801 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
16:25
Femtosecond timing-jitter between photo-cathode laser and ultra-short electron bunches by means of hybrid compression / Pompili, Riccardo (Laboratory Nazionali di Frascati) ; Anania, M.P (Laboratory Nazionali di Frascati) ; Bellaveglia, M (Laboratory Nazionali di Frascati) ; Biagioni, A (Laboratory Nazionali di Frascati) ; Castorina, G (Laboratory Nazionali di Frascati and University of Catania) ; Chiadroni, E (Laboratory Nazionali di Frascati) ; Cianchi, A (University of Rome Tor Vergata) ; Croia, M (Laboratory Nazionali di Frascati) ; Di Giovenale, D (Laboratory Nazionali di Frascati) ; Ferrario, M (Laboratory Nazionali di Frascati) et al.
The generation of ultra-short electron bunches with ultra-low timing-jitter relative to the photo-cathode (PC) laser has been experimentally proved for the first time at the SPARC_LAB test-facility (INFN-LNF, Frascati) exploiting a two-stage hybrid compression scheme. The first stage employs RF-based compression (velocity-bunching), which shortens the bunch and imprints an energy chirp on it. [...]
CERN-ACC-2017-0048.- Geneva : CERN, 2017 - Published in : 10.1088/1367-2630/18/8/083033 Fulltext: PDF;

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2017-06-15
11:15
Three electron beams from a laser-plasma wakefield accelerator and the energy apportioning question / Yang, X (Strathclyde University, Glasgow, UK) ; Brunetti, Enrico (Strathclyde University, Glasgow, UK) ; Reboredo Gil, David (Strathclyde University, Glasgow, UK) ; Welsh, Gregor H (Strathclyde University, Glasgow, UK) ; Li, Y.F (Strathclyde University, Glasgow, UK) ; Cipiccia, Silvia (Strathclyde University, Glasgow, UK) ; Ersfeld, Bernhard (Strathclyde University, Glasgow, UK) ; Grant, D. W (Strathclyde University, Glasgow, UK) ; Grant, P. A (Strathclyde University, Glasgow, UK) ; Islam, Muhammad (Strathclyde University, Glasgow, UK) et al.
Laser-wakefield accelerators are compact devices capable of delivering ultra-short electron bunches with pC-level charge and MeV-GeV energy by exploiting the ultra-high electric fields arising from the interaction of intense laser pulses with plasma. We show experimentally and through numerical simulations that a high-energy electron beam is produced simultaneously with two stable lowerenergy beams that are ejected in oblique and counter-propagating directions, typically carrying off 5–10% of the initial laser energy. [...]
CERN-ACC-2017-0047.- Geneva : CERN, 2017 - Published in : Sci. Rep. 7 (2017) 43910 Fulltext: CERN-ACC-2017-0047 - PDF; CERN-ACC-2017-0047-2 - 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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2017-06-13
15:30
HOM characterization for beam diagnostics at the european XFEL injector / Baboi, Nicoletta (DESY) ; Hellert, Thorsten (DESY and University of Hamburg) ; Shi, Liangliang (DESY and Manchester University) ; Wamsat, Thomas, DESY ; Jones, Roger M (Cockcroft Institute and Manchester University) ; Joshi, Nirav (Cockcroft Institute and Manchester University)
Higher Order Modes (HOM) excited by bunched electron beams in accelerating cavities carry information about the beam position and phase. This principle is used at the FLASH facility, at DESY, for beam position monitoring in 1.3 and 3.9 GHz cavities. [...]
CERN-ACC-2017-0046.- Geneva : CERN, 2017 - Published in : Fulltext: PDF;
In : International Beam Instrumentation Conference, Barcelona, Spain, 11 - 15 Sep 2016

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2017-06-13
15:19
A comparison of surface properties of metallic thin film photocathodes / Mistry, Sonal (Loughborough University) ; Cropper, Mike (Loughborough University) ; Valizadeh, Reza (STFC) ; Jones, L.B (STFC) ; Middleman, Keith (STFC) ; Hannah, Adrian (STFC) ; Militsyn, B.L (STFC) ; Noakes, Tim (STFC)
In this work the preparation of metal photocathodes by physical vapour deposition magnetron sputtering has been employed to deposit metallic thin films onto Cu, Mo and Si substrates. The use of metallic cathodes offers several advantages: (i) metal photocathodes present a fast response time and a relative insensitivity to the vacuum environment (ii) metallic thin films when prepared and transferred in vacuum can offer smoother and cleaner emitting surfaces. [...]
CERN-ACC-2017-0045.- Geneva : CERN, 2017 - Published in : Fulltext: PDF;
In : 7th International Particle Accelerator Conference, Busan, Korea, 8 - 13 May 2016

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The EuCARD-2 Enhanced European Coordination for Accelerator Research & Development project is co-funded by the partners and the European Commission under Capacities 7th Framework Programme, Grant Agreement 312453. Project website: http://eucard2.web.cern.ch.