The Vulcan Nd : glass laser at the Central Laser Facility is a Petawatt (10 15 W) interaction facility available to the UK and international user community. The facility came online to users in 2002 and considerable experience has been gained operating the Vulcan facility in this mode. The facility is designed to deliver irradiance on target of 10 21 W cm −2 for a wide-ranging experimental programme in fundamental physics and advanced applications. This includes the interaction of super-high-intensity light with matter, fast ignition fusion research, photon induced nuclear reactions, electron and ion acceleration by light waves and the exploration of the exotic world of plasma physics dominated by relativity.
A kinetic study of electronically metastable nitrogen atoms, N(2 2Dj), is presented. Metastable nitrogen atoms are produced by microwave discharge of N2 diluted in He in a fast flow system. The concentration of N(2D5/2i3/2) is monitored by using electron spin resonance spectroscopy. Deactivation rate constants are reported for N(í)j) with the gases N20,
Station W16.1 is a fixed wavelength (1.4 Å) x-ray diffraction station recently constructed and commissioned at the SRS. It has been designed specifically for time-resolved studies of noncrystalline and fibrous materials and optimized for low angle measurements. Wide angle diffraction will also be available with simultaneous small and wide angle scattering/diffraction a future facility. In order to perform dynamic (∼1 ms) low angle measurements on weakly scattering systems, the station design has had to incorporate several novel features so as to achieve the predicted 1×1013 photon/s at the specimen.
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