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Development of Alternative X-ray Optics

Development of Alternative X-ray Optics. Webster Cash Phil Oakley University of Colorado & Randy McEntaffer University of Iowa. Extended X-ray Off-plane Spectrometer EXOS. Launched November 20, 2006 November 13, 2009. Optical Design: Wire-grid collimator & Off-plane Grating Array.

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Development of Alternative X-ray Optics

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  1. Development of Alternative X-ray Optics Webster Cash Phil Oakley University of Colorado & Randy McEntaffer University of Iowa

  2. Extended X-ray Off-plane Spectrometer EXOS LaunchedNovember 20, 2006November 13, 2009

  3. Optical Design:Wire-grid collimator & Off-plane Grating Array

  4. Extended X-ray Off-plane Spectrograph • 3.25° FOV + 3 m length = 6.7” opening aperture • Wire grid collimator • Off-plane grating array • Gaseous Electron Multiplier (GEM) detectors

  5. Wire-grid collimator

  6. nλ/d β α γ α Off-plane grating array

  7. Off-plane Grating ArraySuitable for IXO

  8. GEM Detectors(Now Baselined for a SMEX)

  9. Collimator calibration FWHM ~ 1.7 mm “scatter” ~ 1%

  10. Target: Cygnus Loop Miyata et al. 2007

  11. 2007 Flight Spectrum 65 seconds, 2 features: 29 counts & 86 counts, 1.8 mm & 1.7 mm FWHM Detector 0 ~ 40.14±2.39 Å, 43.89±1.96 Å Detector 1 ~ 44.78±2.34 Å, 48.53±1.91 Å

  12. Efficiency and Resolution Testing Problem has been adequate beam and enough focal length Optics swings Detector X-ray source 8m 8m • Vacuum test facility at CASA/ARL • Based on a Maxim test facility • Configuration can be changed for specific tests

  13. Optics Testing First Up: a Rigaku K-B Optic KB mirrors X-ray source Detector 8m 8m • Vacuum test facility at CASA/ARL • Configuration can be changed for specific tests

  14. Rigaku K-B Optics 1-D 2-D We will be characterizing a 1-D in the next few months

  15. IXO Holographic Grating KB spherical mirrors Radial groove grating X-ray source Detector 8m 8m • Vacuum test facility at CASA/ARL • Configuration can be changed for specific tests

  16. Raytracing of Test Setup

  17. Summary • Off-plane Gratings now returning interesting x-ray spectra via rocketry • New test facility coming on line • Test of Rigaku Optic • Test of IXO Holographic Grating • IXO Grating Designs and Development • McEntaffer next – after coffee break

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