Andrea Marino - Université de Rennes 1
... switching. As photo-reversible molecular switches, spin crossover (SCO) materials are of particular interest. These photomagnetic and photochromic prototype materials undergo metastable photoinduced phase transition between two states of different spin multiplicity, namely low-spin (LS) and high-spi ...
... switching. As photo-reversible molecular switches, spin crossover (SCO) materials are of particular interest. These photomagnetic and photochromic prototype materials undergo metastable photoinduced phase transition between two states of different spin multiplicity, namely low-spin (LS) and high-spi ...
ABSTRACT PARAMETRIC LIMITATIONS ON DISCHARGE PERFORMANCE IN THE MARYLAND CENTRIFUGAL EXPERIMENT
... multidimensional parameter space in which MCX operates so as to ascertain the performance boundaries along each of the variable axes. In as much as is possible, the variables are expressly decoupled in order to determine their unique effect upon discharge performance. This study has led to the follo ...
... multidimensional parameter space in which MCX operates so as to ascertain the performance boundaries along each of the variable axes. In as much as is possible, the variables are expressly decoupled in order to determine their unique effect upon discharge performance. This study has led to the follo ...
Central region study for a moderate energy cyclotron
... is equal to zero. In this region electric focusing becomes important. In a uniform acceleration gap the electric field between the dee and the dummy dee exerts a lense action on the ions. In case the particle has gained energy after crossing the gap, this focusing can be seen as a combination of sev ...
... is equal to zero. In this region electric focusing becomes important. In a uniform acceleration gap the electric field between the dee and the dummy dee exerts a lense action on the ions. In case the particle has gained energy after crossing the gap, this focusing can be seen as a combination of sev ...
Io`s interaction with Jupiter`s magnetosphere
... Figure 4: Left: the torus density and some of the Galileo flybys. Right: the composition of the plasma in the cold and warm torus. ........................................................................ 9! Figure 5: Left: a vertical section with the giant cloud in Io’s orbital plane while the torus ...
... Figure 4: Left: the torus density and some of the Galileo flybys. Right: the composition of the plasma in the cold and warm torus. ........................................................................ 9! Figure 5: Left: a vertical section with the giant cloud in Io’s orbital plane while the torus ...
Dynamics and Transport of Laser
... ated electron beams. Most commonly used tracking codes applied here and in the field of conventional particle acceleration are found to exhibit substantial deficits in the applied models for treating space charge in the regime of laser acceleration. The ensuing artifacts stem from common approximati ...
... ated electron beams. Most commonly used tracking codes applied here and in the field of conventional particle acceleration are found to exhibit substantial deficits in the applied models for treating space charge in the regime of laser acceleration. The ensuing artifacts stem from common approximati ...
Superconductivity
Superconductivity is a phenomenon of exactly zero electrical resistance and expulsion of magnetic fields occurring in certain materials when cooled below a characteristic critical temperature. It was discovered by Dutch physicist Heike Kamerlingh Onnes on April 8, 1911 in Leiden. Like ferromagnetism and atomic spectral lines, superconductivity is a quantum mechanical phenomenon. It is characterized by the Meissner effect, the complete ejection of magnetic field lines from the interior of the superconductor as it transitions into the superconducting state. The occurrence of the Meissner effect indicates that superconductivity cannot be understood simply as the idealization of perfect conductivity in classical physics.The electrical resistivity of a metallic conductor decreases gradually as temperature is lowered. In ordinary conductors, such as copper or silver, this decrease is limited by impurities and other defects. Even near absolute zero, a real sample of a normal conductor shows some resistance. In a superconductor, the resistance drops abruptly to zero when the material is cooled below its critical temperature. An electric current flowing through a loop of superconducting wire can persist indefinitely with no power source.In 1986, it was discovered that some cuprate-perovskite ceramic materials have a critical temperature above 90 K (−183 °C). Such a high transition temperature is theoretically impossible for a conventional superconductor, leading the materials to be termed high-temperature superconductors. Liquid nitrogen boils at 77 K, and superconduction at higher temperatures than this facilitates many experiments and applications that are less practical at lower temperatures.