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LXO/MagEX Meeting Greenbelt, 24/10/07 Telescope Baseline Configuration: Imaging Capability (Micropore Optic) Telescope Field of View ~ 30° x 30° Angular.

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Presentation on theme: "LXO/MagEX Meeting Greenbelt, 24/10/07 Telescope Baseline Configuration: Imaging Capability (Micropore Optic) Telescope Field of View ~ 30° x 30° Angular."— Presentation transcript:

1 LXO/MagEX Meeting Greenbelt, 24/10/07 Telescope Baseline Configuration: Imaging Capability (Micropore Optic) Telescope Field of View ~ 30° x 30° Angular Resolution ~ 1.5 arcminutes Detector Pixel Size < 200 μm Detector Energy Range ~ 0.2 to 2.0 keV Detector Resolution ~ 50 eV FWHM @ 600 eV Detector Geometric Area ~ 13 cm x 13 cm Total Instrument Mass ~ 20 – 40 kg Instrument Power ~ 20W operational, 2W standby

2 LXO/MagEX Meeting Greenbelt, 24/10/07 Micropore Optics, Leicester Heritage: Optics manufactured to our specification by Photonis (France) Mercury Imaging X-ray Spectrometer (MIXS) (BepiColombo, ESA) PI George Fraser (SRC, Leicester) Status: funded, launch 2013 Wide-Field Auroral Imager (WFAI) (KuaFu, Chinese) PI Mark Lester (RSPP, Leicester) Status: proposed, launch ~ 2012 Lobster-Eye Wide-Field Telescope (LWFT) (Spectrum-RG, Russian) PI George Fraser (SRC, Leicester) Status: proposed, launch ??

3 LXO/MagEX Meeting Greenbelt, 24/10/07 MIXS-T relatively narrow fov ~ few (TBD) degrees

4 LXO/MagEX Meeting Greenbelt, 24/10/07 LWFT Prototype Support Structure (left)

5 LXO/MagEX Meeting Greenbelt, 24/10/07 LWFT Optic Characteristics Focal length = 37.5 cm Radius of curvature = 75 cm Channel cross-section = 20 µm Channel array pitch = 24 µm Channel length (MCP thickness) = 1 mm MCP size (one plate) = 4 cm x 4 cm Channel coating ~ 200 Å Ni Support Structure Material = Beryllium Alloy Optic Mass ~ < 1 kg

6 LXO/MagEX Meeting Greenbelt, 24/10/07 Detector Plane Detector plane geometric area is half the optic geometric area

7 LXO/MagEX Meeting Greenbelt, 24/10/07 Optic RCFL 20°30°40° 50.025.017.526.234.9 75.037.526.239.352.4 100.050.034.952.469.8 50.025.08.713.117.5 75.037.513.119.626.2 100.050.017.526.234.9 ~ 170 cm 2 Area ~ 380 cm 2 Optic (cm) Detector (cm) Optic and Detector Geometrical Area for FOV & Focal Length

8 LXO/MagEX Meeting Greenbelt, 24/10/07 EPIC-MOS detector plane: 7 x 2.5 cm x 2.5 cm CCDs; Total Geometric Area ~ 44 cm 2 Devices, FI MOS CCDs, manufactured by E2V (was EEV)

9 LXO/MagEX Meeting Greenbelt, 24/10/07 Large Area focal plane detectors now common in Optical applications focal plane array (E2V devices) Gaia (ESA) Cost ~ 50-100 K Euro/Unit

10 LXO/MagEX Meeting Greenbelt, 24/10/07 Large Area Detector (LAD) Program for X-ray Applications Research joint funded by UK industry (E2V) and PPARC Application in this case was X-ray macromolecular crystallography 5.5 cm x 4.1 cm active area, 3.2M pixel, 27 µm, 2 MHz pixel readout, Device is 3-sides buttable

11 LXO/MagEX Meeting Greenbelt, 24/10/07 Readout is 130 k pixel s -1 readout, so to read out full frame of 2k x 4k pixels would take ~ 64 s ! On-board binning to 150 µm pixels (~ 2 arc minute on sky) allows Minimum readout time of 0.64 s (not counting overhead, ~ factor of 2) Max source count rate ~ 0.8 cts / kilosecond /pixel Hamamatsu CCD….BI device, 6.69 cm x 3.15 cm, 4-sides buttable Designed for proposed HyperSuprime Camera on Subaru Focal plane array has 176 CCDs

12 LXO/MagEX Meeting Greenbelt, 24/10/07 PSF Optimum Centre FOV PSF Optimum Outer FOV PSF Optimum Across FOV CCD arrangement on Focal Plane ?

13 LXO/MagEX Meeting Greenbelt, 24/10/07 Technical Issue: Power How many CCDs can we operate within the power budget? Project Issue (assuming technical solution): Development Cost Can we use “off-the-shelf CCDs?” Bottom-line Detector Issues…to be solved

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