Oxford Centre for High Energy Density Science (OxCHEDS)

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Raman scattering for intense high orbital angular momentum harmonic generation

Optica Publishing Group (2016) ftu3a.2

Authors:

J Vieira, RMGM Trines, EP Alves, RA Fonseca, JT Mendonça, R Bingham, P Norreys, LO Silva
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AWAKE, The Advanced Proton Driven Plasma Wakefield Acceleration Experiment at CERN

(2015)

Authors:

E Gschwendtner, E Adli, L Amorim, R Apsimon, R Assmann, A-M Bachmann, F Batsch, J Bauche, VK Berglyd Olsen, M Bernardini, R Bingham, B Biskup, T Bohl, C Bracco, PN Burrows, G Burt, B Buttenschon, A Butterworth, A Caldwell, M Cascella, E Chevallay, S Cipiccia, H Damerau, L Deacon, P Dirksen, S Doebert, U Dorda, J Farmer, V Fedosseev, E Feldbaumer, R Fiorito, R Fonseca, F Friebel, AA Gorn, O Grulke, J Hansen, C Hessler, W Hofle, J Holloway, M Huther, D Jaroszynski, L Jensen, S Jolly, A Joulaei, M Kasim, F Keeble, Y Li, S Liu, N Lopes, KV Lotov, S Mandry, R Martorelli, M Martyanov, S Mazzoni, O Mete, VA Minakov, J Mitchell, J Moody, P Muggli, Z Najmudin, P Norreys, E Oz, A Pardons, K Pepitone, A Petrenko, G Plyushchev, A Pukhov, K Rieger, H Ruhl, F Salveter, N Savard, J Schmidt, A Seryi, E Shaposhnikova, ZM Sheng, P Sherwood, L Silva, L Soby, AP Sosedkin, RI Spitsyn, R Trines, PV Tuev, M Turner, V Verzilov, J Vieira, H Vincke, Y Wei, CP Welsch, M Wing, G Xia, H Zhang
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Temporal evolution of longitudinal bunch profile in a laser wakefield accelerator

Physical Review Special Topics: Accelerators and Beams American Physical Society 18:12 (2015)

Authors:

M Heigoldt, A Popp, K Khrennikov, J Wenz, SW Chou, S Karsch, SI Bajlekov, Simon Hooker, B Schmidt

Abstract:

© 2015 authors. Published by the American Physical Society. We present single-shot measurements of the longitudinal bunch profile from a laser-wakefield accelerator with sub-fs resolution, based on detection of coherent transition radiation in a broad spectral range. A previously developed phase retrieval algorithm enables reconstruction of the bunch profile without prior assumptions about its shape. In this study, a variable-length gas target is used to explore the dynamics of bunch evolution. Our results show that once the laser energy is depleted the time structure of the generated electron beam changes from a single bunch to a double bunch structure, well suited for driver-witness type experiments.
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Path to AWAKE: Evolution of the concept

(2015)

Authors:

A Caldwell, E Adli, L Amorim, R Apsimon, T Argyropoulos, R Assmann, A-M Bachmann, F Batsch, J Bauche, VK Berglyd Olsen, M Bernardini, R Bingham, B Biskup, T Bohl, C Bracco, PN Burrows, G Burt, B Buttenschon, A Butterworth, M Cascella, S Chattopadhyay, E Chevallay, S Cipiccia, H Damerau, L Deacon, P Dirksen, S Doebert, U Dorda, E Elsen, J Farmer, S Fartoukh, V Fedosseev, E Feldbaumer, R Fiorito, R Fonseca, F Friebel, G Geschonke, B Goddard, AA Gorn, O Grulke, E Gschwendtner, J Hansen, C Hessler, S Hillenbrand, W Hofle, J Holloway, C Huang, M Huther, D Jaroszynski, L Jensen, S Jolly, A Joulaei, M Kasim, F Keeble, R Kersevan, N Kumar, Y Li, S Liu, N Lopes, KV Lotov, W Lu, J Machacek, S Mandry, I Martin, R Martorelli, M Martyanov, S Mazzoni, M Meddahi, L Merminga, O Mete, VA Minakov, J Mitchell, J Moody, A-S Muller, Z Najmudin, TCQ Noakes, P Norreys, J Osterhoff, E Oz, A Pardons, K Pepitone, A Petrenko, G Plyushchev, J Pozimski, A Pukhov, O Reimann, K Rieger, S Roesler, H Ruhl, T Rusnak, F Salveter, N Savard, J Schmidt, H von der Schmitt, A Seryi, E Shaposhnikova, ZM Sheng, P Sherwood, L Silva, F Simon, L Soby, AP Sosedkin, RI Spitsyn, T Tajima, R Tarkeshian, H Timko, R Trines, T Tueckmantel, PV Tuev, M Turner, F Velotti, V Verzilov, J Vieira, H Vincke, Y Wei, CP Welsch, M Wing, G Xia, V Yakimenko, H Zhang, F Zimmermann
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Ultra-fast collisional ion heating by electrostatic shocks

Nature Communications Nature Publishing Group 6 (2015) 8905

Authors:

A Turrell, M Sherlock, SJ Rose

Abstract:

High intensity lasers can be used to generate shockwaves which have found applications in nuclear fusion, proton imaging, cancer therapies, and materials science. Collisionless electrostatic shocks are one type of shockwave widely studied for applications involving ion acceleration. Here we show a novel mechanism for collisionless electrostatic shocks to heat small amounts of solid density matter to temperatures of ∼ keV in tens of femtoseconds. Unusually, electrons play no direct role in the heating, and it is the ions which determine the heating rate. Ions are heated due to an interplay between the electric field of the shock, the local density increase during the passage of the shock, and collisions between different species of ion. In simulations, these factors combine to produce rapid, localised heating of the lighter ion species. Although the heated volume is modest, this would be one of the fastest heating mechanisms discovered if demonstrated in the laboratory.
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