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Advanced X-Ray Imaging and Polarimetry with Focusing Optics

Explore the cutting-edge technologies of X-Ray Imaging and HXR Polarimetry, including Phase Zone Plates and Fresnel Lenses, optimizing energy focus for enhanced detection. The benefits of leveraging Phase Fresnel Lenses, Gas Electron Multipliers, and Modulation Collimators for precise imaging and polarimetry, opening new avenues in astrophysics research. Discover the potential of Time Projection Chamber Polarimeters and their effective area vs. energy capabilities, revolutionizing X-ray imaging requirements.

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Advanced X-Ray Imaging and Polarimetry with Focusing Optics

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  1. X-Ray Imaging (0.1 arcsec at 6.7 keV)andHXR Polarimetry(10 – 50 keV) Brian Dennis NASA/GSFC

  2. Focusing X-rays Zone Plate Phase Zone Plate Phase Fresnel Lens e < 10.1% e < 40.4% e<100% G.K.Skinner

  3. Phase Fresnel Lens Focal length is a function of photon energy

  4. 1 2 4 6 8 GOES M2.8 Flare DEM = 0.36 1049 (T/2keV)-0.72 cm-3 keV-1 Fe abundance = 2.0 x photospheric Ca – 4.7 x photospheric S – 0.4 x coronal Si – 0.2 x coronal

  5. Fresnel lens(es) or PZPs eg 1-2 cm dia Fresnel lens or PZPs eg 1-2 cm dia CCD array(s) eg 100 mm CCD array eg 100 mm • Phase Fresnel Lens – a possible design concept 50-100 m boom or formation flying Angular resolution ~ 0.1 arc sec Field of view ~ few arc mins Effective area ~ 1 cm2 (in a line)

  6. Hard X-ray Imaging Polarimetry • Energy range ~2 – ~50 keV • Complements Compton scattering polarimetry >50 keV • Photoelectron track imaging • Time Projection Chamber (TPC) • Goddard development • Gas Electron Multiplier (GEM) with strip readout • 70%/30% mixture of argon and dimethyl ether (DME) • 2-D positional information – strip number & time • Modulation collimators for Fourier-transform imaging • Leverage off GEMS SMEX for astrophysics • Italians developing direct 2-D capability • Focusing optics for direct imaging polarimetry

  7. Time Projection ChamberPolarimeter

  8. Effective Area vs. Energy Time Projection Chamber

  9. Imaging Polarimeter Concept

  10. The End

  11. Lens Parametersto focus 6.7 keV X-rays

  12. X-ray Imaging Requirements

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