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XACT Sounding Rocket Alignment

XACT Sounding Rocket Alignment. Raphael Cherney ‘11 Dan Elg ’11 Clay Gimenez ’12 Steven Higgins ‘12. Sounding Rockets. XACT Sounding Rocket. Telemetry and ACS Systems. X-ray Polarimeters , Electronics, & MXS. Black Brant VC. Optical Bench. Terrier Mk70.

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XACT Sounding Rocket Alignment

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  1. XACT Sounding Rocket Alignment Raphael Cherney ‘11 Dan Elg ’11 Clay Gimenez ’12 Steven Higgins ‘12

  2. Sounding Rockets

  3. XACT Sounding Rocket Telemetry and ACS Systems X-ray Polarimeters, Electronics, & MXS Black Brant VC Optical Bench Terrier Mk70 X-ray Concentrators & Star Tracker A 1st approximation of complete XACT rocket

  4. X-Ray Astronomy

  5. Mirrors

  6. Requirements • Bench separation of 3 meters • Displacement readings of .1 mm accuracy • Angle measurements of .2 arcminutes

  7. Position Sensitive Photodiode

  8. Original Concept Laser PSD-A Beam Splitter PSD-B Position Sensitive Photodiodes

  9. Current Setup Laser PSD-A Beam Splitter PSD-B Position Sensitive Photodiodes

  10. Basic Geometry

  11. Electronic System Position Sensitive Photodiodes (PSD) ±15V analog +5V Rectifier Circuit Differential ADC X Y X Y SPI PIC Mac/PC GUI Laser USB

  12. Testing Rig

  13. Calibration • Mill with 2-axis CNC Accurite Controller • High accuracy (.0002”) measurements in two dimensions • Characterize PSD response over entire sensor • Test circuit

  14. Deliverables • Optical Bench Setup • The “smarts” made up of software to calculate displacements and a manual • All pieces built and coded to required tolerances

  15. Equations Images courtesy of Google Images and Goddard Space Flight Center (and Dan Elg)

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