Computations have been made of the parameters of a neutral-beam driven, field-reversed mirror reactor as a function of beam injection energy. Q values of 4 to 5 and a fusion power of 10 to 50 MW per cell are found at beam energies of 200 to 500 keV. Cost estimates indicate a direct capital cost of less than $1000/kW/sub e/ for multicell versions of the reactor.

The DT fusion neutron irradiation of one LLL superconductor wire and one LLL Nb/sub 3/Sn foil at 4.2/sup 0/K is described. The sample position, beam-on time, and neutron dose record are given. The results from two ''profile'' dosimetry foils measuring the lateral variation in neutron flux are included.

Anomalous transmission due to diffraction from the (220) planes of germanium has been measured for 1.65 mm, 8.58 mm, and 19.6 mm thick single crystals at energies ranging from 15 to 55 keV. A method of producing a continuously variable, in energy, source of nearly monoenergetic x-rays based on anomalous transmission and a bremsstrahlung input spectrum is described. Collimator design, crystal selection, crystal preparation, peak shapes, full-widths at half-maximum, and intensities for fixed crystals are discussed and compared to theory. The anomalous transmission factors ranged from 1 x 10/sup -7/ to 5 x 10/sup -6/ resulting in usable intensities of 2.5 to 37 photons per sec for tungsten target bremsstrahlung input spectra.