We have studied the double ionization of helium and other rare gases using an electron-ion coincidence technique. With this scheme, the electron energy spectrum correlated to the creation of a doubly charged ion may be compiled. In all cases, the observed double ionization electron distributions are similar and enhanced at high energies, while the single ionization spectra exhibit distinct diff...

The presence of a strong magnetic eld intrinsically changes the orbit of electrons in their Coulomb interactions with ions for a range of parameters. The characteristic scale for the orbit modi cation is r0 = (Zme=4 0B) where Ze is the ion charge, me the electron mass and B the magnetic eld strength. The scale length is comparable to the interparticle spacing when n 1=3 e r0 = (!pe=!ce) 2=3(Z=4...

C. N. Harvey,1,2,* A. Ilderton,2,† and B. King3,‡ 1Centre for Plasma Physics, Department of Physics and Astronomy, Queen’s University Belfast, Belfast BT7 1NN, United Kingdom 2Department of Applied Physics, Chalmers University of Technology, SE-41296 Gothenburg, Sweden 3School of Computing and Mathematics, Plymouth University, Plymouth PL4 8AA, United Kingdom (Received 26 September 2014; publis...

We explore the effects of an applied strong external magnetic field in a three flavour massless colour superconductor. The long-range component of the B field that penetrates the superconductor enhances some quark condensates, leading to a different condensation pattern. The external field also reduces the flavour symmetries in the system, and thus it changes drastically the corresponding low e...

We study the conditions under which an overdamped regime can be attained in the dynamic evolution of a quantum field configuration. Using a ∗E-mail: [email protected] †E-mail: [email protected]. NSF Presidential Faculty Fellow. ‡E-mail: [email protected] 1 real-time formulation of finite temperature field theory, we compute the effective evolution equation of a ...

Understanding strong ground motions in the near-fault areas is important for seismic risk assessment in densely populated areas. In the past, lack of information on strong ground motion for large and moderate earthquakes led to the use of mainly far field large and moderate earthquake records in equations for calculation of the strong ground motion parameters. In this article, we collected and ...

In this manuscript, we present a survey of designs and implementations of research sensor nodes that rely on FPGAs, either based upon standalone platforms or as a combination of microcontroller and FPGA. Several current challenges in sensor networks are distinguished and linked to the features of modern FPGAs. As it turns out, low-power optimized FPGAs are able to enhance the computation of sev...