Plasma-Wakefield Accelerator Group

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Multiple pulse resonantly enhanced laser plasma wakefield acceleration

AIP Conference Proceedings AIP Publishing 1507:1 (2012) 872-873

Authors:

L Corner, R Walczak, LJ Nevay, S Dann, SM Hooker, N Bourgeois, J Cowley
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Modelling of the emma ns-ffag ring using gpt

IPAC 2012 - International Particle Accelerator Conference 2012 (2012) 319-321

Authors:

RTP D'Arcy, S Jolly, BD Muratori, JK Jones, B Van Der Geer

Abstract:

EMMA (Electron Machine with Many Applications) is a prototype non-scaling Fixed-Field Alternating Gradient (ns-FFAG) accelerator whose construction at Daresbury Laboratory, UK, was completed in the autumn of 2010. The energy recovery linac ALICE [1] will serve as an injector for EMMA, within an energy range of 10 to 20 MeV. The injection line consists of a symmetric 30o dogleg to extract the beam from ALICE, a matching section and a tomography section for transverse emittance measurements. This is followed by a transport section to the injection point of the EMMA ring. The ring is composed of 42 cells, each containing one focusing and one defocusing quadrupole. Commissioning of the EMMA ring started in late 2010. A number of different injection energy and bunch charge configurations are planned; for some the effects of spacecharge may be significant. It is therefore necessary to model the electron beam transport in the injection line and ring using a code capable of both calculating the effect of and compensating for space-charge. Therefore the General Particle Tracer (GPT) code [2] has been used. A range of injection beam parameters have been modelled for comparison with experimental results. Copyright © 2012 by IEEE.

New results from the emma experiment

IPAC 2012 - International Particle Accelerator Conference 2012 (2012) 2134-2136

Authors:

B Muratori, J Jones, DJ Kelliher, S Machida, JM Garland, H Owen, CS Edmonds, K Hock, M Ibison, IW Kirkman, A Wolski, J Pasternak, R D'arcy

Abstract:

EMMA (Electron Model for Many Applications) is a prototype non-scaling electron FFAGoperating at Daresbury Laboratory. After demonstrating serpentine channel acceleration andfast resonance crossing in 2011, studies continue of the beam dynamics to explore the largetransverse and longitudinal acceptance, the detailed effects of integer tune crossing atslow acceleration rates, comparison of measurements to detailed field measurements, and theexperimental mapping of the machine by relating the initial and final phase spacecoordinates. These recent results are reported in this paper, together with more practicalimprovements such as injection orbit matching with real-time monitoring of the bunchcoordinates in transverse phase space. Copyright © 2012 by IEEE.

Acceleration in the linear non-scaling fixed-field alternating-gradient accelerator EMMA

Nature Physics Springer Nature 8:3 (2012) 243-247

Authors:

S Machida, R Barlow, JS Berg, N Bliss, RK Buckley, JA Clarke, MK Craddock, R D’Arcy, R Edgecock, JM Garland, Y Giboudot, P Goudket, S Griffiths, C Hill, SF Hill, KM Hock, DJ Holder, MG Ibison, F Jackson, SP Jamison, C Johnstone, JK Jones, LB Jones, A Kalinin, E Keil, DJ Kelliher, IW Kirkman, S Koscielniak, K Marinov, N Marks, B Martlew, PA McIntosh, JW McKenzie, F Méot, KJ Middleman, A Moss, BD Muratori, J Orrett, HL Owen, J Pasternak, KJ Peach, MW Poole, Y-N Rao, Y Saveliev, DJ Scott, SL Sheehy, BJA Shepherd, R Smith, SL Smith, D Trbojevic, S Tzenov, T Weston, A Wheelhouse, PH Williams, A Wolski, T Yokoi
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MuSIC, the world's highest intense DC muon beam using a pion capture system

IPAC 2011 - 2nd International Particle Accelerator Conference (2011) 820-822

Authors:

A Sato, Y Kuno, H Sakamoto, Y Hino, NH Tran, NM Truong, S Cook, R D'Arcy, M Fukuda, K Hatanaka, Y Mori, T Ogitsu, A Yamamoto, M Yoshida

Abstract:

MuSIC is a project to provide the world's highest-intensity muon beam with continuous time structure at Research Center of Nuclear Physics (RCNP) of Osaka University, Japan. A pion capture system using a superconducting solenoid magnet and a part of superconducting muon transport solenoid channel have been build in 2009. The highest muon production efficiency was demonstrated by the beam tests. Results of the beam test conclude that the MuSIC can provide more than 108 muons/sec using a 400 W proton beam. Copyright © 2011 by IPAC'11/EPS-AG.