Oxford Centre for High Energy Density Science (OxCHEDS): publications

Energy levels and transition probabilities for boron-like Fe XXII

Astronomy & Astrophysics EDP Sciences 455:3 (2006) 1157-1160

Authors:

V Jonauskas, P Bogdanovich, FP Keenan, R Kisielius, ME Foord, RF Heeter, SJ Rose, GJ Ferland, PH Norrington

High energy density science with FELs, intense short pulse tunable X-ray sources

Proceedings of SPIE the International Society for Optical Engineering 6261 I (2006)

Authors:

RW Lee, SJ Moon, HK Chung, RC Cauble, S Glenzer, OL Landen, SJ Rose, HA Scott, G Gregori, D Riley

Abstract:

Short pulse (< 100 fs) tunable X-ray and VUV laser sources, based on the free electron laser (FEL) concept, will be a watershed for high energy density research in several areas. These new 4 ^th generation light sources will have extremely high fields and short wavelength (∼.1 nm) with peak spectral brightness -photons/(s/mrad ²/mm ²/0.1% bandwidth- 10 ¹⁰ greater than 3 ^rd generation light sources. We briefly discuss several applications: the creation of warm dense matter (WDM), probing of near solid density plasmas, and laser-plasma spectroscopy of ions in plasmas. The study of dense plasmas has been severely hampered by the fact that laser-based probes that can directly access the matter in this regime have been unavailable and these new 4 ^th generation sources will remove these restrictions. Finally, we present the plans for a user-oriented set of facilities that will incorporate high-energy, intense short-pulse, and x-ray lasers at the first x-ray FEL, the LCLS to be opened at SLAC in 2009.

Erratum: Evidence of photon acceleration by laser wake fields (Physics of Plasmas (2006) 13 (033108))

Physics of Plasmas 13:7 (2006)

Authors:

CD Murphy, R Trines, J Vieira, AJW Reitsma, R Bingham, JL Collier, EJ Divall, PS Foster, CJ Hooker, AJ Langley, PA Norreys, RA Fonseca, F Fiuza, LO Silva, JT Mendonça, WB Mori, JG Gallacher, R Viskup, DA Jaroszynski, SPD Mangles, AGR Thomas, K Krushelnick, Z Najmudin

Electron beam hollowing in laser-solid interactions

Plasma Physics and Controlled Fusion 48:8 (2006) 1181-1199

Authors:

JR Davies, JS Green, PA Norreys

Abstract:

Electron beam hollowing in a plasma is investigated using an analytical, rigid beam model and two different hybrid codes in an attempt to explain observations of hollow plasma formations on the back of plastic targets in experiments carried out on the Vulcan terawatt laser. The relevance of the results to electron transport in fast ignition inertial confinement fusion is considered using dimensionless scaling parameters. © 2006 IOP Publishing Ltd.

The development of a flexible large area neutron spectrometer for ultra-intense laser-plasma interaction experiments

Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 564:1 (2006) 486-490

Authors:

H Habara, KL Lancaster, PA Norreys

Abstract:

A flexible multi-channel neutron spectrometer has been constructed to measure both the ion temperature and acceleration mechanisms in ultra-intense laser-plasma interactions. Angularly resolved neutron spectra are required to deduce the momentum distribution of ions accelerated by the intense electric field. The first neutron spectra have been obtained using this instrument in a 100-TW class laser interaction with deuterated plastic targets. These show a slight Doppler shift to lower energy side of the center of mass energy of d (d, n)3 He reactions at 2.45 MeV. A three-dimensional Monte-Carlo calculation of the neutron generation confirms the fast ion acceleration from the rear side of a solid target which has a Maxwellian momentum distribution. © 2006 Elsevier B.V. All rights reserved.

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