title: Profiled bar transmission gratings: soft-x-ray calibration of new Kirchoff solutions.
abstract: A new analytical model, derived rigorously from scalar diffraction theory, accurately fits soft-x-ray measurements of symmetrical profile gold transmission gratings in all diffracted orders. The calibration system selects numerous photon energies by use of a high-resolution grazing-incidence monochromator and a dc e-beam source. Fine-period free-standing gratings exhibit limited performance and require such testing to determine parameters of and select acceptable gratings for use in time-resolved (0.25 ns) spectrographs of known radiometric response. Unfolded spectra yield a Z-pinch plasma peak kT approximately 250 eV, total radiated energy approximately 900 kJ, and a pinch-driven gold-wall hohlraum Planckian kT approximately 86 eV.
authors.affiliation: Hettrick Scientific, 1-39-59 Tama-cho, Fuchu-shi, Tokyo, Japan. hettrickscientific@yahoo.com
authors.forename: Michael C
authors.initials: MC
authors.lastname: Hettrick
authors.forename: Michael E
authors.initials: ME
authors.lastname: Cuneo
authors.forename: John L
authors.initials: JL
authors.lastname: Porter
authors.forename: Larry E
authors.initials: LE
authors.lastname: Ruggles
authors.forename: Walter W
authors.initials: WW
authors.lastname: Simpson
authors.forename: Mark F
authors.initials: MF
authors.lastname: Vargas
authors.forename: David F
authors.initials: DF
authors.lastname: Wenger