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Noise Characterization of the SIDECAR ASIC Readout Chip for SNAP

Noise Characterization of the SIDECAR ASIC Readout Chip for SNAP. Martin Diaz Stanford Linear Accelerator Center August 14, 2008. Our Expanding Universe. The expansion history of the universe can be mapped out What is causing it to accelerate?. Dark Energy.

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Noise Characterization of the SIDECAR ASIC Readout Chip for SNAP

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  1. Noise Characterization of the SIDECAR ASIC Readout Chip for SNAP Martin Diaz Stanford Linear Accelerator Center August 14, 2008

  2. Our Expanding Universe The expansion history of the universe can be mapped out What is causing it to accelerate?

  3. Dark Energy Believed to be the reason for the accelerating expansion Dark energy dominates our universe Yet, little is known about it

  4. Dark Energy

  5. SuperNova Acceleration Probe Part of the Joint Dark Energy Mission (JDEM) Between NASA and DOE

  6. SuperNova Acceleration Probe Weak gravitational lensing N. Kaiser

  7. SuperNova Acceleration Probe Measure changes in the expansion rate with the help of type Ia supernova

  8. Type Ia Supernova No observed Hydrogen Found in spiral and elliptical galaxies Outer stellar layers missing prior to explosion

  9. Type Ia Supernova Binary System Matter is transferred Causes white dwarf to implode

  10. Type Ia Supernova Luminosity is from radioactive decay of Cobalt and Nickel into Iron Same Fuel = Same Luminosity Act as “Standard Candles”

  11. SuperNova Acceleration Probe SNAP will measure: Peak brightness Distance away Redshift Expansion factor

  12. SuperNova Acceleration Probe SIDECAR ASIC

  13. SIDECAR System for Image Digitization Enhancement, Control and Retrieval Application Specific Integrated Circuit (ASIC) Alternative to discrete electronics

  14. SIDECAR Converts Analog signal from image detector to digital signal Easily transmitted and stored

  15. SIDECAR Problem: Reduce noise Method: Optimization of microcode Compare multiple images Without image sensor

  16. SIDECAR Procedure Two consecutive images Take difference in pixel value Collect to form histogram and obtain RMS Results

  17. SIDECAR Procedure After some modification to the Amplifier Reset Results

  18. SIDECAR Procedure 100 images Compare a single pixel Results

  19. SIDECAR Procedure 50 images 256 pixels Results

  20. Conclusion After testing the SIDECAR in 32 channel mode Microcode optimization RMS value as low as 4.8

  21. Future Work Operation under cryogenic temperatures Integration with Hybrid Visible Silicon Imager (HyViSI) imaging sensor.

  22. Acknowledgements Thank you to my mentor Leonid Sapozhnikov and the rest of the SNAP team. I would also like to thank the Department of Energy and the SULI staff.

  23. Resources http://snap.lbl.gov C. Bebek, “The SNAP Space Mission”, Nuclear Instruments and Methods in Physics Research, Vol. 579, Issue 2, pp. 848-852, 2007. M. Loose et al., “The SIDECAR ASIC – Focal Plane Electronics on a Single CHIP”, Cryogenic Optical Systems and Instruments XI, Proc. SPIE Vol. 5904, pp. 293-302, 2005.

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