Non‐Maxwellian Proton Velocity Distributions in Nonradiative Shocks

Oblique radiative shocks, including their interactions with nonradiative polytropic shocks

Impact-velocity dependence of ejected-electron distributions for ionization in proton-hydrogen collisions

Ab initio calculations of ejected-electron momentum distributions are presented for proton on hydrogen collisions at impact energies ranging from 5 to 100 keV and an impact parameter of 1.2 a.u. At low energies the transverse momentum distributions show a double-peak structure similar to what is predicted by a two-state Sturmian theory @Macek and Ovchinnikov, Phys. Rev. Lett. 80, 2298 ~1998!#. ...

Monoenergetic Proton Beams from Laser Driven Shocks

Laser driven ion acceleration (LDIA) has the potential to deliver compact and affordable accelerators for applications in many fields of science and medicine. Specifically, radiotherapy of cancerous tumors requires ion energies in the range of 200-300 MeV/a.m.u. and with energy spreads on the order of 5%, parameters thus far beyond the LDIA experimental results using the most powerful lasers in...

Balmer-Dominated Spectra of Nonradiative Shocks in the Cygnus Loop, RCW 86 and Tycho Supernova Remnants

We present an observational and theoretical study of the optical emission from nonradiative shocks in three supernova remnants: the Cygnus Loop, RCW 86 and Tycho. The spectra of these shocks are dominated by collisionally excited hydrogen Balmer lines which have both a broad component caused by proton-neutral charge exchange and a narrow component caused by excitation of cold neutrals entering ...

Analysis of suprathermal tails using hourly-averaged proton velocity distributions at 1 AU

We obtain hourly values of tail densities and of power law indices,  , of suprathermal (speeds above 2.48 times the solar wind speed) protons from power law fits to hourly velocity distribution functions in the solar-wind-frame. ACE/SWICS and ULEIS data, which often include very low counting statistics, are used to derive hourly proton phase space densities. We find that during part of the rec...