Detector calibration procedure for detectors with Kappa Euler and partial Euler/Kappa goniostats.

Here is a description of the test data needed for full calibration:

• Lysozyme or similarly well-diffracting crystal - frozen.
• A detector should be placed at such a distance that diffraction spots can be observed in the corners.
• The oscillation angle should be 1 degree [0.1 degrees for HPC detectors].
• Probably 10 seconds per frame should be adequate - if you will not have reasonably strong spots at the corner make the exposure longer and check your primary beam intensity. [0.02 seconds for HPC detector.]

Calibration of the Kappa/Euler goniostat requires the following data sets 

1. 180 degrees of omega scan, phi=0, kappa=0  (oscillation range 1 degree, 180 frames)
2. 20 degrees of omega scan, phi=180, kappa=0 (oscillation range 1 degree, 20 frames)
3. 20 degrees of omega scan, phi=0, kappa=5 (oscillation range 1 degree, 20 frames)
4. 20 degrees of omega scan, phi=0, kappa=-10 (oscillation range 1 degree, 20 frames)
5. 20 degrees of omega scan, phi=20, kappa=-10 (oscillation range 1 degree, 20 frames)
6. 20 degrees of omega scan, phi=0, kappa=0 (oscillation range 1 degree, 20 frames) at a distance that differs by 10 millimeters.
7. 20 degrees of omega scan, phi=0, kappa=0 (oscillation range 1 degree, 20 frames) with 2theta 10 degrees
8. 20 degrees of omega scan, phi=0, kappa=0 (oscillation range 1 degree, 20 frames) with 2theta -5 degrees

   And optionally:

9. 20 degrees of phi scan, omega=-45 (oscillation range 1 degree, 20 frames) (optional - phi scanning is usually inferior); only for Kappa goniostat