1. Raphael Cherney ‘11 Dan Elg ’11 Clay Gimenez ’12 Steven Higgins ‘12

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

7.  Bench separation of 3 meters  Displacement readings of.1 mm accuracy  Angle measurements of.2 arcminutes

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

10. Laser Beam Splitter Position Sensitive Photodiodes PSD-A PSD-B

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

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

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

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