March 30: Verify Reproduce-ability & Correlation w/WFC

• Configuration:

  • Mounting: ACS in TBF/Diamond Configuration, in SSDIF
  • Cooling: Chiller Plate
  • Optical Source: WFC: RAS/Cal point source; HRC: Coronagraph
  • Starting Temp: Ambient, at Start of Day

• Figures:

  • WFC stability track: ( GIF, Postscript )
  • HRC stability track: ( GIF, Postscript )
  • Temperature data: ( PDF 804kb )

• Results:

  • Little to no motion seen during ACS "warm-up"
  • Chillers turned on to 14C causes Interface Plate temperature change with causes motion in both WFC and HRC
    • In this test, a 2C delta causes ~ 4 pixels of motion
    • HRC moves same direction as Mar 22 data set (parallel to floor)
    • WFC moves:
      • Perpendicular to floor (up and down) as viewed into aperture
      • Fore to Aft at CCD, as viewed looking down on instrument