Analysis discussion meeting

Friday 25 Aug 2023, 09:00 → 10:00 Europe/Zurich

https://psich.zoom.us/j/64223995890?pwd=b0RJMmdQQytMdnlDOW9wd0YrLy9WUT09

Andreas:

Detector array: Frame prepared. MIXE will use their drift chamber, so downstream detectors still need to be placed in

Autofilling: New system, filling on each arm --> Goes quite slow, we need to have a look at that

 

Michael:

Recalibrating after gain drift correction:

• Gaussian fits from -1 sigma --> ~20 eV residual remaining around 700 keV (potassium 2p-1s)
• Hypermet+gaussian+step --> Similar values --> Energy calibration seems quite well under control

Remark from Frederik: We should be careful with INL errors (local non-continuous behavior in the ADC)

We should change the dynamic range for running potassium

Trapezoid filter optimization:

• Saving 50k clock ticks to tune detectors offline --> Threshold high to avoid collecting data on Compton
• Fit exponential tail of waveforms (~1000 events) --> Fit in narrow range provides slight difference with full range (use narrow range!)
• Trapezoid is flat within less than 1 adc channel
• Next up: optimize gap and peaking time --> Michael will follow up on this

Analyzer updates: (see elog entries for details)

• Bug fixes
• Tree writer can now also save raw germanium events (mainly intended for trapezoid optimization)
• Addition of exact extrapolation method for ELET
• For any specific requests ask Frederik or Michael

 

Frederik:

Request Andreas: Update midas for beamtime? Set point interface in midas?

Request Michael: Analysis during beamtime, rerunning the analyzer to do gaindrift correction

VME + DAQ PC are currently out (some tests will be done with the clover at PSI): When the wall goes up, Cesar wants to do some tests for Quartet

 

Stella:

Filling with new system takes long. ~45 mins for one previously filled detector yesterday --> Looking for a solution, Stella will follow up on this

 

Publication on 2022 data:

General idea: Focus on different targets and their capture rate; do not put too much focus on target making and it's issues

Stella will check once more on the intensities with the cascade code

09:00 → 09:20 Update Michael

Speaker: Michael Heines (KU Leuven)

update_2508.pdf