Reconstruction and Analysis meeting

Thursday Jan 22, 2026, 2:00 PM → 3:30 PM Europe/Rome

zoom

Giorgio Dho (Istituto Nazionale di Fisica Nucleare)

Using zoom room:

https://cern.zoom.us/j/98724905835?pwd=ZkdYMEVWT3dlNFM2UzBtWkx4am9hUT09

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2:00 PM → 2:20 PM Run5 status and next steps

Speaker: Melba D'Astolfo (Istituto Nazionale di Fisica Nucleare)

run_5_status.pdf

- Update on the Run5 analysis flow
- On one side the a fast association based on graph-ML technique is under way
   - Goal is to have a fast association to: remove noise cluster from image and possibly be used for fast CYGNO04  daq
   - Training mostly made with single events images. Soon test to match more crowded images
   - Time expected for some update: begin February
- On the other side try writing and unfolding technique and testing it on AmBe data Run3
- Run5 cuts on data will wait for simulation data from Emanuele
- Response matrix for the unfolding under development. To be trained on MC data
- Binning of energy spectrum needs to be carefully thought. Similar to our resolution on neutron energy (10 keV?)
- Slide on the full workflow with main steps could help understanding big bottlenecks

2:20 PM → 2:40 PM Boh peak and Rn

Speaker: Davide Pinci (Istituto Nazionale di Fisica Nucleare)

boh-rn.pdf

- Update on boh peak. They look like round things, from energy and position in z could be compatible with copper X-ray emission from GEM
- We expect this signal from simulation and we could have them in CYGNO-04 from cathode and GEM
- Simulation and digitisation underway
- Rn work: Up to now we extracted the original estimated distribution of Rn and progenies
- If this is true, beta decays of 214Bi and 214Po should be emitted from cathode. And how many?
- Estimation of effective rate on low energy ongoing, but it looks they are indeed a large contribution at low energy

2:40 PM → 3:00 PM Data reduction: QUEST noise

Speaker: Igor Fonseca Pains

Quest Digitization.pdf

- Update on the trigger selection data reduction
- Study on quest noise. Big single pixel sparks are affecting the linear filters
- Crazy pixels removed with laplace filter to smooth them on the image (found if it is higher than all neighbours)
- Threshold to determine which spark to remove  checking the difference between raw image and median filtered one. Where the slope on different changes you have a change of population: sparks
- Threshold defined as 50 ADC above pedestal
- Effect on signal to be tested, but expected to be negligible
- Time required for filter is 0.13 s on CPU

3:00 PM → 3:20 PM QUEST digitization

Speaker: Igor Fonseca Pains

Quest noise .pdf

- Quest digitization
- First step is to match the correct parameters for Quest low gain
- Size of image done
- To match the sc_integral the lowest intensity daily scan was used (worst case scenario)
- Pietro's method used to adapt parameters
- Changing A was not enough to cope with the data shape (change in absorption, GEM gain and beta saturation)
- Size and nhits variables fail at low gain as in high gain as Pietro showed for AmBe
- Looking at the redpix intensity distribution, data has pixel with very high intensity which digitisation does not have
- Investigation required. Here there could be big issues