Bump connectivity scans

This MR adds and improves some things related to source testing and scanning bump failures.

• Add bump failure scans:
  • A merged bumps scan based on detection of high crosstalk
  • Three different disconnected bumps scans:
    • 1. Crosstalk-based (fast: 8min + 1min [tuning + scan])
    • 2. Based on threshold shift upon sensor bias change (slower: 5min + 12min [tuning + scan])
    • 3. Modified source scan (need source, rather slow)
• Improve other scans:
  • Detect bad pixels in digital and analog scan
  • Normal source scan: Add stop condition minimum number of hits per pixel
  • Noise occupancy scan: Send much more triggers and properly use statistics for noisy pixel identification
• (Add optional HitOr-trigger based noise occupancy scan for special noisy pixels not seen with normal scan)
• (Return uncertainties from S-curve fitting, add optional argument for passing fit start parameter)

TODO:

• Source-based bump scan: Limit occupancy of noisy pixels and ignore disconnected pixels during estimation of average occupancy per tile
• Add meta scripts
• Cherry-pick changes to S-curve fitting
• Cherry-pick HitOr-trigger based noise occupancy scan
• Perhaps add ToT-histogram fitting routine to (modified) source scan in order to also catch disconnected pixels that are very noisy?

NOTES:

Estimated errors* of bump disconnection scans are:

• [25x100]:

1. Crosstalk: N_{disconnected}^{real} \simeq N_{measured}\!\,^{+6 \pm 5}_{-11 \pm 10} = N_{measured}\!\,^{+0.008\% \pm 0.007\%}_{-0.01\% \pm 0.01\%}

2. Threshold: N_{disconnected}^{real} \simeq N_{measured}\!\,^{+3 \pm 2}_{-5 \pm 1} = N_{measured}\!\,^{+0.004\% \pm 0.003\%}_{-0.007\% \pm 0.001\%}

• [50x50]:

1. Crosstalk: N_{disconnected}^{real} \simeq N_{measured}\!\,^{+2 \pm 1}_{-42 \pm 1} = N_{measured}\!\,^{+0.003\% \pm 0.001\%}_{-0.05\% \pm 0.001\%}

2. Threshold: N_{disconnected}^{real} \simeq N_{measured}\!\,^{+1 \pm 1}_{-16 \pm 11} = N_{measured}\!\,^{+0.001\% \pm 0.001\%}_{-0.02\% \pm 0.01\%}

*) (+)-error means average not recognized disconnected bumps, (-)-error means average not recognized connected bumps

Test results with skewed bump bonding [25umx100um sensor] (bump bond connection maps):

Source scan:

Discrepancies:

Connected with crosstalk, disconnected with source:

Disconnected with crosstalk, connected with source:

Connected with threshold, disconnected with source:

Disconnected with threshold, connected with source:

Simulation: