Possible Simplifying Requirements

• don't change geometry
• serial numbers for all detectors
• understand detector non-linearities before experiments
• if you do change geometry have a way to get new geometry info in a standard way
• stable beam-center (um, jets 50um). standard way to get beam center
• stable jets
• make jets/beam comparable unless you need stable to a pixel-size
• stable experimental setup
• don't switch between sparse/dense photon cases for spectrometer, and/or understand in advance
• measure detector tilts
• avoid double-beam-focus seen in SPI
• smaller pixels would mean photons don't occupy single-pixels, and we would get fooled less by hot-pixels
• gravity sensors on cameras
• more fiducial markings for geometry
• better calibrations for motor to positions
• hardware protection for cameras to avoid changes due to damage (camera replacement, bad-pixels)
• for xpp ring-center finding:
  • make t0 finding fast (need to have pump-probe time set to see radially-symmetric physics signal: to see physics signal need to look at angular integration, which requires a rough center)
  • need to put a well-known sample in exactly in the right spot
  • or use the jet solvent itself