Precollimator for X-Ray Telescope (stray-light baffle)
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1 Precollimator for X-Ray Telescope (stray-light baffle) Mindrum Precision, Inc Kurt Ponsor Mirror Tech/SBIR Workshop Wednesday, Nov
2 Overview Mindrum.com Precollimator Past Present Future 2
3 Past Space X-Ray Telescopes (XRT) Basic Structure Effectiveness Past Construction 3
4 Space X-Ray Telescopes XMM-Newton 1999 Chandra 1999 HETE INTEGRAL ESA/NASA
5 Swift 2004 Space X-Ray Telescopes Suzaku AGILE 2007 NuSTAR NASA/JPL/ASI/JAXA
6 Space X-Ray Telescopes Astrosat 2015 Hitomi (ASTRO-H) NICER (ISS) 2017 HXMT/Insight 慧眼 NASA/JPL/CNSA
7 Space X-Ray Telescopes Mindrum.com 7 NASA/JPL-Caltech Harrison, F.A. et al. (2013; ApJ, 770, 103) doi: / x/770/2/103
8 Basic Structure XRT Mindrum.com Grazing Incidence 8 NASA/JPL-Caltech
9 Basic Structure: NuSTAR Mirrors 9 NASA/JPL-Caltech
10 XMM Newton XRT Basic Structure XRT 10 ESA
11 XMM-Newton mirrors Basic Structure XRT 11 D. de Chambure, XMM Project (ESTEC)/ESA
12 Basic Structure XRT Thermal Precollimator on ROSAT 12
13 AGILE Precollimator Basic Structure XRT 13
14 Spektr-RG 2018 Basic Structure 14 MPE
15 Basic Structure: Stray X-Rays Mindrum.com 15 NASA/JPL-Caltech
16 Basic Structure: Grazing Mindrum.com 16 NASA
17 X-Ray Effectiveness: Straylight Correct Reflection Secondary Only Backside Reflection Primary Only 17
18 X-Ray Effectiveness Mindrum.com The Crab Nebula by: ROSAT (1990) Chandra 18 S. L.Snowden USRA, NASA/GSFC NASA/CXC/SAO/F.Seward et al.
19 Straylight Rejection EM Secondary Reflection Backside Reflection X-Ray Effectiveness 19 Hideyuki Mori, Yoshitomo Maeda, Manabu Ishida, Takuro Sato, Kou Ichihara, et al., The pre-collimator for the ASTRO-H x-ray telescopes: shielding from stray lights, Space Telescopes and Instrumentation 2012: Ultraviolet to Gamma Ray, Proc. of SPIE Vol B-1
20 X-Ray Effectiveness Crab Nebula Placed Off-Axis Stray light with Engineering model 20
21 Must get better optics Physically block straylight Must match alignment X-Ray Effectiveness Mirror and precollimator Unique Trials for Engineering Model 21
22 Suzaku X-Ray Telescope Precollimator Pre-collimator Mirrors Alignment is critical 22 NASA/JAXA
23 Alignment frame Individual metal foil Past Production: Suzaku 23 Hideyuki Mori, et al., Development of Astro-E2 XRT pre-collimator or stray light protection Optics for EUV, X-Ray, and Gamma-Ray Astronomy, Proc. SPIE Vol. 5168
24 Past Production: Hitomi Complex build with individual sheets of foil 24 * Hideyuki Mori, et al., The pre-collimator for the ASTRO-H x-ray telescopes: shielding from stray lights Space Telescopes & Instrumentation 2012: Ultraviolet to Gamma Ray, Proc. of SPIE Vol. 8443, 84435B
25 Past Production: Hitomi Labor intensive Vibration problems Foil bending/alignment mismatch 25 NASA/Hideyuki Mori, et al.,*
26 Anomalous Arms: Spiral Galaxy M106 Infrared data from the Spitzer Space Telescope - red Digitized Sky Survey - yellow Radio data from the Very Large Array - purple X-ray Mindrum.com data from Chandra - blue 26 X-ray: NASA/CXC/Univ. of Maryland/A.S. Wilson et al.; Optical: Palomar Observatory. DSS; IR:NASA/JPL-Caltech; VLA: NRAO/AUI/NSF
27 Tycho Supernova Mindrum.com 27 X-ray: NASA/CXC/SAO, Infrared: NASA/JPL-Caltech; Optical: MPIA, Calar Alto, O.Krause et al.
28 Giant Black Hole Kicked Out of Home Galaxy: CID-42 Mindrum.com 28 X-ray: NASA/CXC/SAO/F.Civano et al; Optical: NASA/STScI; Optical (wide field): CFHT, NASA/STScI
29 Tarantula Nebula Mindrum.com 29 X-ray: NASA/CXC/PSU/L.Townsley et al.; Infrared: NASA/JPL/PSU/L.Townsley et al.
30 Kepler s Supernova remnant: NASA s Spitzer Space Telescope (red), Hubble Space Telescope (yellow), and Chandra X-ray Observatory (green and blue) Mindrum.com 30 R. Sankrit (NASA Ames) and W.P. Blair (Johns Hopkins Univ.)
31 RCW 86 supernova remains NASA s Spitzer and WISE Telescopes (red and orange), NASA s Chandra X-ray Observatory (blue) European Space Agency s XMM-Newton Observatory (green) Mindrum.com 31 B. Williams (NASA GSFC)
32 Blazing Black Holes Spotted in Spiral Beauty: spiral galaxy IC 342 (Caldwell 5), Digitized Sky Survey - Visible Light NuSTAR X-ray data - Magenta Mindrum.com 32 NASA/JPL-Caltech/DSS
33 Hubble & Chandra Mindrum.com 33 Messier 82 (M82) NASA
34 Overview Mindrum.com Precollimator Past Present Future 34
35 Mindrum Precision Present researching Precollimator since
36 Present Mindrum.com Wire EDM Additive Manufacturing Chemical Milling 36
37 Wire EDM Efficient cutting Repetitive precision Increased design flexibility Present 37
38 Video Mindrum.com 38
39 Present Monolithic/unibody design Combined blades and support structure Increased mechanical integrity/higher strength 39 NASA/ASTRO-H
40 Present Monolithic/unibody design Combined blades and support structure Increased mechanical integrity/higher strength 40
41 Present Mindrum.com Still need start hole Additive manufacturing investigated and rejected 41
42 Additive Manufacturing Electron Beam Melting Laser Sintering Present Unable to hold tolerance Curling of walls beyond [1mm] thick Unsuccessful kept adding support material Better to start off with solid material 42
43 Reduce thickness/weight Present 43
44 Present EDM unable to thin wall [0.1mm] 44
45 Chemical Milling Present Uniform Removal of material Known hydrogen embrittlement characteristics 45
46 Present Wire EDM with Chemical Milling Hands off machining Reduced cost Faster production Large, unique, diverse geometry Multiple prototypes for Engineering Models (EM) 46
47 Present Rough or smooth surface finish 47
48 48
49 49
50 50
51 51
52 52
53 53
54 Optically or mechanically measured for Thickness True position alignment 54
55 55
56 56
57 57
58 Overview Mindrum.com Precollimator Past Present Future 58
59 Blade Future Input Requested Height Length Thickness: thinner than mirror μm Alignment Geometry: Blade - mirror Gap between mirror and blade features Material Needs 59
60 Possible capabilities Tapered walls or notches Multi layer assemblies Coatings Future Integrated Mounting clamps Call for telescope needs (Diameter, Gap width, Rib width, weight restriction, Height) 60
61 Future Mindrum.com NuSTAR 133 blades Section pattern Irregularities 61
62 Future: Mindrum Improvement Patterned for mirror irregularity Fully customized support structure Increased precollimator/mirror alignment 62
63 Copy mirror irregularity Future 63 NASA/JPL-Caltech
64 Copy mirror irregularity Future 64
65 Future Mindrum.com Spektr-RG 2018 XARM (Astro-H 2) 2020 SVOM 2021 ATHENA
66 Future Capable of growth for new XRT demands Larger detection area (>2 m 2 at 1 kev, 0.25 ath 6 kev) Broader energy range Diverse field of view (Narrow-5 / Wide-40 x40 ) Angular resolution lower than 5 a time resolution < 10µs high count rate capability 66
67 Future Requires new precollimator shapes Mindrum Precision create new geometry Create lighter structures Unique shapes Engineering Model (EM) variants Prove increased capability/calibration Integrate solid body alignment with optic mirrors 67
68 Overview Mindrum.com Precollimator Past Present Future XRT work Precollimator Growth 68
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