The cross-plane thermal conductivity of thin films of WSe2 grown from alternating W and Se layers is as small as 0.05 watts per meter per degree kelvin at room temperature, 30 times smaller than the c-axis thermal conductivity of single-crystal WSe2 and a factor of 6 smaller than the predicted minimum thermal conductivity for this material. We attribute the ultralow thermal conductivity of these disordered, layered crystals to the localization of

We present a method for processing hydroxyapatite (HA) thin films on Ti-5Al-2.5Fe substrates. The films were grown by pulsed laser deposition (PLD) in vacuum at room temperature, using a KrF* excimer laser. The amorphous as-deposited HA films were recrystallized in ambient air by a thermal treatment at 550 C. The best results have been obtained when inserting a buffer layer of ceramic materials (TiN, ZrO2 or Al2O3). The films were characterized by

High-quality epitaxial strontium-hexaferrite (SrFe12O19) thin films were grown by pulsed laser deposition (PLD) on c-cut sapphire using KrF* excimer laser at a frequency of 2 J/cm2 and substrate temperature of 8008C in 100 mTorr oxygen environment. The X-ray diffraction (XRD) and morphology analyzes showed films with excellent crystalline structure and flat surface. The thickness was found to influence considerably the surface morphology and magnetic

A series of direct-drive implosion experiments using two types of capsules have been performed on the OMEGA laser system. In the first, D^3He is enclosed in a CH shell. The high-energy structure in the 14.7-MeV proton line is identified with the early-time shock yield (when the shell rhoR is relatively small and the line suffers relatively little downshift). The dominant low-energy structure is identified with the later-time compression yield, when

Initial results from direct-drive spherical cryogenic target implosions on the 60-beam OMEGA laser system [T. R. Boehly, D. L. Brown, R. S. Craxton , Opt. Commun. 133, 495 (1997)] are presented. These experiments are part of the scientific base leading to direct-drive ignition implosions planned for the National Ignition Facility (NIF) [W. J. Hogan, E. I. Moses, B. E. Warner , Nucl. Fusion 41, 567 (2001)]. Polymer shells (1-mm diam with walls

The response of CR-39 track detectors to neutrons has been characterized and used to measure neutron yields from implosions of DD- and DT-filled targets at the OMEGA laser facility [T. R. Boehly , Opt. Commun. 133, 495 (1997)], and the scaling of neutron fluence with R (the target-to-detector distance) has been used to characterize the fluence of backscattered neutrons in the target chamber. A Monte-Carlo code was developed to predict the CR-39 efficiency

Thin indium tin oxide (ITO) films were grown on Si substrates from room temperature up to 150 oC by conventional and in situ ultraviolet-assisted pulsed laser deposition (UVPLD) techniques. Atomic force microscopy and x-ray reflectivity techniques were employed to characterize the surface morphology of the ITO films both on a microscopic and macroscopic scale. Roughness values (rms) below 0.5 nm were routinely achieved on films grown by the UVPLD