Emily Y. Xu

Magnetic bottle electron spectrometer using permanent magnets

Design principles and initial results are presented for a magnetic bottle electron spectrometer of high collection efficiency (2π sr) and good energy resolution. The instrument duplicates the carefully shaped axially decreasing magnetic field configuration of Kruit and Read [J. Phys. E 16, 313 (1983)], but replaces the high‐field electromagnet central to the Kruit–Read design with two simple pole pieces energized by permanent magnets. The use of permanent magnets requires modifications of the transition region (between the high‐field electron production zone and the low‐field drift tube analyzer) to avoid axial field reversals associated with fringing fields.

Optical Data Storage and Image Processing in Rare Earth Ion Doped Crystals Using Stimulated Photon Echo

Three experiments relevant for optical data storage and image processing using the stimulated photon echo technique in rare earth ion doped crystals are described. These are: an apparent laser excitation energy dependence of the homogeneous dephasing time for these crystals, optical image processing on a nanosecond time scale using microjoule input energies and optical storage and recovery of multiple data bits.