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Understanding turbulence and mix in compressible flows is of fundamental importance to real-world applications such as chemical combustion and supernova evolution. The ability to run in three dimensions and at very high resolution is required for the simulation to accurately represent the interaction of the various length scales, and consequently, the(More)
1. The role of presumed chemical mediators of inflammation in the heat-induced sensitization of cutaneous C-polymodal nociceptors (CPNs) was examined in a rabbit ear preparation maintained in vitro by intra-arterial perfusion with a solution free of protein and cellular elements. 2. In this preparation, CPNs consistently showed enhanced responsiveness after(More)
Accelerators for heavy-ion inertial fusion energy (HIF) have an economic incentive to fit beam tubes tightly to beams, putting them at risk from electron clouds produced by emission of electrons and gas from walls. Theory and PIC simulations suggest that the electrons will be radially trapped in the ≥1 kV ion-beam potential. We are beginning studies on the(More)
We present initial results for the self-consistent beam-cloud dynamics simulations for a sample LHC beam, using a newly developed set of modeling capability based on a merge [1] of the three-dimensional parallel Particle-In-Cell (PIC) accelerator code WARP [2] and the electron-cloud code POSINST [3]. Although the storage ring model we use as a test bed to(More)
Stray electrons can be introduced in positive-charge accelerators for heavy ion fusion (or other applications) as a result of ionization of ambient gas or gas released from walls due to halo-ion impact, or as a result of secondary-electron emission. Electron accumulation is impacted by the ion beam potential, accelerating fields, multipole magnetic fields(More)
Results are presented from the rst systematic nonlinear kinetic simulation study of the scalings and parameter dependences of toroidal ion-temperature-gradient (ITG) turbulence and transport, and from the rst such study that includes sheared toroidal ows. Key results include the observation of clear gyroBohm scaling of the turbulent transport and of a(More)
Three-dimensional high-resolution simulations are performed of the Richtmyer-Meshkov (RM) instability for a Mach 6 shock, and of the passage of a second shock from the same side through a developed RM instability. The second shock is found to rapidly smear ne structure and strongly enhance mixing. Studies of the interaction of moderately strong shocks with(More)
The Edge Simulation Laboratory (ESL) is a multi-institutional collaboration to develop kinetic edge codes using continuum techniques. A new code, COGENT, based on fourth-order conservative finite-volume discretization of gyrokinetic equations, has been developed and is now undergoing testing. Initially the code is electrostatic, 4D (axisym-metric), with a(More)
During the past two years, the U.S. heavy ion fusion science program has made significant experimental and theoretical progress in simultaneous transverse and longitudinal beam compression, ion-beam-driven warm dense matter targets, high brightness beam transport, advanced theory and numerical simulations, and heavy ion target designs for fusion. First(More)