1. 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 256 Energy Levels (10 Bit A/D) Taylor UniversityHENA CDR July 9 &10 1997

2. 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 10 o C + - 20 o C Survival Temperature: +60 o C, -50 o C ? Mass 3.53 kg (estimated) ? Dimensions 7.62 x 22.35 x 24.13 cm Taylor UniversityHENA CDR July 9 & 10 1997

3. 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 Taylor UniversityHENA CDR July 9 & 10 1997

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

5. System Design Taylor UniversityHENA CDR July 9 & 10 1997

6. 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 Taylor UniversityHENA CDR July 9 & 10 1997

7. 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 Taylor UniversityHENA CDR July 9 & 10 1997

8. SSD Sensor Heritage 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) Taylor UniversityHENA CDR July 9 & 10 1997 Images from SEPS (HENA has similar SSD design)

9. FEA Microcircuit Heritage 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. Taylor UniversityHENA CDR July 9 & 10 1997 POLAR Satellite SEPS SPADUS

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

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

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

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

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

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

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

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

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

19. Detector Geometry Taylor UniversityHENA CDR July 9 & 10 1997

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

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

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

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

24. Vendor Response List 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) Name of VendorResponse Taylor UniversityHENA CDR July 9 & 10 1997

25. 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 Taylor UniversityHENA CDR July 9 & 10 1997

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

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