1. Profiled bar transmission gratings: soft-x-ray calibration of new Kirchoff solutions
- Author
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Mark F. Vargas, Larry Ruggles, Michael Edward Cuneo, Walter W. Simpson, David Franklin Wenger, Michael C. Hettrick, and John L. Porter
- Subjects
Diffraction ,Physics ,Photon ,business.industry ,Materials Science (miscellaneous) ,Physics::Optics ,Industrial and Manufacturing Engineering ,Photon counting ,law.invention ,Optics ,law ,Hohlraum ,Calibration ,Business and International Management ,business ,Diffraction grating ,Radiometric calibration ,Monochromator - 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.
- Published
- 2004