Optimisation of laser driven proton beams by an innovative target scheme

Year: 2017

Authors: Ahmed H., Kar S., Cantono G., Doria D., Giesecke AL., Gwynne D., Lewis CLS., Macchi A., Nersisyan G., Naughton K., Willi O., Borghesi M.

Autors Affiliation: Queens Univ Belfast, Sch Math & Phys, Belfast BT7 1NN, Antrim, North Ireland; Rutherford Appleton Lab, Cent Laser Facil, Didcot OX11 0QX, Oxon, England;‎ Dept Phys E Fermi, Largo B Pontecorvo 3, I-56127 Pisa, Italy;‎ Heinrich Heine Univ, Inst Laser & Plasmaphys, D-40225 Dusseldorf, Germany; Natl Res Council CNR INO, Natl Opt Inst, A Gozzini Unit, Via G Moruzzi 1, I-56124 Pisa, Italy

Abstract: Proton beams driven by the target normal sheath acceleration mechanism exhibit large divergence and a broad energy distribution with low particle number at high energy. Such undesirable characteristics of the beam can be controlled and optimised by employing a recently developed helical coil technique, which exploits the transient self-charging of solid targets irradiated by intense laser pulses. Highly chromatic focusing of the broadband proton beams was achieved by employing this technique at the TARANIS laser system, where the selected energy slice was tuned by varying the pitch of the coil. A quasi-collimated, narrow energy band proton beam of similar to 10(7) particles at 10 MeV was achieved, through a combination of focussing, energy selection and in-situ post-acceleration. This technique may provide a platform for a generation of compact, all-optical ion accelerators.

Journal/Review: JOURNAL OF INSTRUMENTATION

Volume: 12      Pages from: C06025-1  to: C06025-9

More Information: Conference: 3rd ELIMED Workshop on Medical and Multidisciplinary Applications of Laser-Driven Ion Beams at Eli-Beamlines
Location: Lab Nazionali Sud, Catania, ITALY
Date: SEP 07-09, 2016
KeyWords: Accelerator Applications; Beam Optics; Ion sources (positive ions, negative ions, electron cyclotron resonance (ECR), electron beam (EBIS)); Wake-field acceleration (laser-driven, electron-driven)
DOI: 10.1088/1748-0221/12/06/C06025

ImpactFactor: 1.258
Citations: 2
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