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Science Specification Table

Taylor University HENA CDR July 9 &10 1997. Science Specification Table. 12 keV - 250 keV for neutral particles 40.5 cm 2 image plane Electronic Noise 3 keV FWHM Proton Dead Layer <3 keV Focal Length 6.16 to 6.95 cm FOV 40 degrees Pixel size 4 x 4 mm

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Science Specification Table

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  1. Taylor University HENA CDR July 9 &10 1997 Science Specification Table • 12 keV - 250 keV for neutral particles • 40.5 cm2 image plane • Electronic Noise 3 keV FWHM • Proton Dead Layer <3 keV • Focal Length 6.16 to 6.95 cm • FOV 40 degrees • Pixel size 4 x 4 mm • 256 Energy Levels (10 Bit A/D)

  2. Taylor University HENA CDR July 9 & 10 1997 Engineering Specification Table • Sensors: XY Position Si solid state sensors • Two vendors used: Micron and Canberra • Analog Electronics 250 A225 preamplifiers 16 ASIC amplifiers • ? Total Power 3 Watts (at supply voltages) • Voltages +/-3.5, +/-5, and bias voltage (-70V) • Planned Temperature Operation 10o C +- 20o C • Survival Temperature: +60oC, -50oC • ? Mass 3.53 kg (estimated) • ? Dimensions 7.62 x 22.35 x 24.13 cm

  3. Taylor University HENA CDR July 9 & 10 1997 SENSOR SPECIFICATIONS • MEASURES NEUTRALS E>12 keV • 4 - 60 ELEMENT ARRAY (12 X 5) • ACTIVE AREA: 48.7mm x 20.8mm per SSD • THICKNESS: >200 MICRONS • THIN WINDOW: <5keV H+ ENERGY LOSS (Si) • BIAS APPLIED TO THIN WINDOW SIDE OPPOSITE PIXELS • LEAKAGE CURENT: <10nA • ELECTRONIC NOISE RESOLUTION: <1KeV FWHM • BOND PADS: 4 - 5 MILS • BOND WIRES: < 1.25 MILS

  4. Taylor University HENA CDR July 9 & 10 1997 SSD Design Features • Parallel processing (240 channels) • High resolution (240 pixel array @ 256 Energy levels) • Low Power • Single Box Assembly

  5. Taylor University HENA CDR July 9 & 10 1997 System Design

  6. Taylor University HENA CDR July 9 & 10 1997 Weight Breakdown • Middle Box .93 kg (cal.) • Radiation Shielding (outside walls = .23 in.) .7 kg (est.) • ? 240 A225 Preamps (SIP package) ? .94 kg (mes.) • 16 ASICs .12 kg (mes.) • 4 PC Board and MDM connectors .24 kg (cal.) • SSD Assembly .15 kg (cal.) • Processing Boards .21 kg (cal.) • Misc parts (screws, connectors) .2 kg (est.) Total 3.13 kg

  7. Taylor University HENA CDR July 9 & 10 1997 Design Philosophy • Use Existing Technology • Use Well Proven Analog Gate Array Technology • High reliability, Parallel Processing, Low Power, and Low Complexity • Rigorous Testing and Burn-In of Subsystems • State-of-the-Art Instrument

  8. Taylor University HENA CDR July 9 & 10 1997 SSD Sensor Heritage Images from SEPS (HENA has similar SSD design) • SSD Sensors • SEPS (Source Loss/Cone Energetic Particle Spectrometer flew in the winter of 95’. It’s mission was to study energetic electrons, ions, and neutrals in the source loss cone. • IPS (Imaging Proton Spectrometer)

  9. Taylor University HENA CDR July 9 & 10 1997 FEA Microcircuit Heritage POLAR Satellite • FEA Micro circuits • POLAR Satellite • SEPS • IPS • PIXIE (Polar Ionospheric X-Ray Imaging Experiment) • SPADUS (flew on the Argos satellite) • MAXIE (Magnetospheric Atmosphere X-Ray Imaging Experiment) flew on Aug. 9, 1993 on the TIROS satellite. It measured x-rays in the range of 4 - 100 keV. SEPS SPADUS

  10. Taylor University HENA CDR July 9 & 10 1997 HENA Middle Box Cross Section

  11. Taylor University HENA CDR July 9 & 10 1997 HENA Middle Box Design

  12. Taylor University HENA CDR July 9 & 10 1997 Middle Box Assembly Renderings SSD Assembly SSD MCP Shield SSD Mount DPU Connection

  13. Taylor University HENA CDR July 9 & 10 1997 ?Middle Box Mass Properties

  14. Taylor University HENA CDR July 9 & 10 1997 Preamplifier Board Design

  15. Taylor University HENA CDR July 9 & 10 1997 Preamplifier Board Rendering Flex Cable Connection 60 A225 Preamps 4 FEA Chips Actel Chip MDM Connector

  16. Taylor University HENA CDR July 9 & 10 1997 A225 Preamp Response Curve

  17. Taylor University HENA CDR July 9 & 10 1997 A225 Preamp Testing Continued

  18. Taylor University HENA CDR July 9 & 10 1997 SSD Mounting Assembly

  19. Taylor University HENA CDR July 9 & 10 1997 Detector Geometry

  20. Taylor University HENA CDR July 9 & 10 1997 Pixel Angular Resolution from Center of Pin Hole

  21. Taylor University HENA CDR July 9 & 10 1997 Angle Limit Diversity Over Detector Surface Per Pixel

  22. Taylor University HENA CDR July 9 & 10 1997 Resolution of SSD w/ Increasing Pixels

  23. Taylor University HENA CDR July 9 & 10 1997 SSD Cap., Noise, Thickness

  24. Taylor University HENA CDR July 9 & 10 1997 Vendor Response List Name of Vendor Response • Canberra Detailed Proposal and Price Schedule for Detector • Micron Detailed Proposal (more costly) under iteration • UDT Sensors Interested (no proposal yet) • Hamamatsu Interested (no proposal yet) • Spectrum Sciences Very interested (Proposal in by Dec. 11)

  25. Taylor University HENA CDR July 9 & 10 1997 Procurement Schedule • OCT. 96’ • RECEIVED 2 PROPOSALS FOR PROTOTYPE AND FLIGHT SENSORS • DEC. 96’ • OBTAIN UPFRONT FUNDING FOR MASK DESIGN • JAN 97’ • PURCHASE PROTOTYPE TO NEAR FLIGHT SPECIFICATIONS • RIGOROUSLY TEST PROTOTYPE • March 97’ • ORDER FLIGHT SENSORS • Jan 98’ • OBTAIN FLIGHT SENSORS 4-6 MONTHS FROM ORDER

  26. Taylor University HENA CDR July 9 & 10 1997 SSD Detector Holder Rendering Metalized PC Card SSD Shields Platform

  27. Taylor University HENA CDR July 9 & 10 1997 PC Card for SSD Design

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