ABSTRACT
We report the observation of radar echoes from the ionization trails of high-energy particle cascades. Data were taken at the SLAC National Accelerator Laboratory, where the full electron beam (â¼10^{9} e^{-} at â¼10 GeV/e^{-}) was directed into a plastic target to simulate an ultrahigh-energy neutrino interaction. The target was interrogated with radio waves, and coherent radio reflections from the cascades were detected with properties consistent with theoretical expectations. This is the first definitive observation of radar echoes from high-energy particle cascades, which may lead to a viable neutrino detection technology for energies â³10^{16} eV.
ABSTRACT
Skin eruptions are an important consideration for any clinician who prescribes anticonvulsant medications. The timely recognition and accurate diagnosis of cutaneous reactions can prevent potentially fatal reactions and affect subsequent anticonvulsant treatment options. This review addresses the most common and most serious cutaneous reactions to anticonvulsant medications. The anticonvulsant hypersensitivity syndrome and individual antiepileptic medications that cause severe skin reactions will be reviewed. These reactions include morbilliform and urticarial drug eruptions as well as the erythema multiforme spectrum.
