Analysis and testing of rod-like penetrators in the 4–5 km/s velocity regime

This work describes the analysis and ballistic range testing to evaluate the performance of rod-like Kill Enhancement Device (KED) penetrators on of multi-layered targets covering large range of densities including high-density material. Tests showed that (1) high-density material can be penetrated at oblique angles of incidence without projectile fragmentation and (2) high explosive within the target can be initiated. Test data from experiments was compared to predictive analyses generated by hydrocodes and found to be in excellent agreement.     

Magnetic susceptibility of submonolayer3He films

We calculate the magnetic susceptibility of submonolayer³He films. First, using the formulation of the equilibrium thermodynamic properties in terms of statistical quasiparticles, we obtain an expression for the magnetic susceptibility of dilute systems of particles interacting through a short-range potential, taking into account binary interactions between the particles. At high temperatures our expression reduces to the one obtained using the virial expansion truncated after the second term. Next, we apply this expression to³He in two dimensions and compare our results with the magnetic susceptibility data of submonolayer³He films adsorbed on Grafoil and on argon-coated Grafoil and previous calculations.