1 / 24

Capacitive coupling measurements.

Capacitive coupling measurements. G. Vidal-Sitjes, J. Burguet-Castells, J.J. Gomez-Cadenas, A.M. Tornero Lopez. Reminder of the model. Example: bidirectional cross-talk. TPC pads, probe, DAQ. Signal reconstruction: phase-lock technique. One sector analyzed 645 alive channels (out of 662).

orla-spence
Download Presentation

Capacitive coupling measurements.

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Capacitive coupling measurements. G. Vidal-Sitjes, J. Burguet-Castells, J.J. Gomez-Cadenas, A.M. Tornero Lopez. HARP Collaboration Meeting

  2. Reminder of the model HARP Collaboration Meeting

  3. Example: bidirectional cross-talk TPC pads, probe, DAQ HARP Collaboration Meeting

  4. Signal reconstruction: phase-lock technique One sector analyzed 645 alive channels (out of 662) HARP Collaboration Meeting

  5. HARP Collaboration Meeting

  6. HARP Collaboration Meeting

  7. HARP Collaboration Meeting

  8. HARP Collaboration Meeting

  9. HARP Collaboration Meeting

  10. HARP Collaboration Meeting

  11. Observation • Huge spread of channels electronic gain • 2.5 daughter channels per channel • 79% of parent charge appears in other pads • 1237 cross-talk relations (all orders) HARP Collaboration Meeting

  12. Order of the cross-talk signals. HARP Collaboration Meeting

  13. First order relations Map of first order relations = map of couplings HARP Collaboration Meeting

  14. Relations relative position R PHI ROW HARP Collaboration Meeting

  15. Number and position of the parents position of clean channels ~325 clean channels HARP Collaboration Meeting

  16. Fitting the capacities & subtracting the XT signals HARP Collaboration Meeting

  17. Assessment of the cross-talk effect on the TPC data with a fast MC simulation. G. Vidal-Sitjes, J.J. Gomez-Cadenas. With many thanks to Lara Scotchmer and Alexander Grossheim HARP Collaboration Meeting

  18. rΦ resolution. ANALOG signals. non equalized cross-talk both σ=1.8 mm σ=0.6 mm σ=1.6 mm HARP Collaboration Meeting

  19. rΦ resolution. DIGITIZED data (no threshold) non equalized cross-talk both σ=1.8 mm σ=0.6 mm σ=1.5 mm HARP Collaboration Meeting

  20. Energy resolution. Analog signals. non equalized cross-talk both σ=44% σ=13% σ=7% HARP Collaboration Meeting

  21. Energy resolution. Digitized data. (no threshold) digitization 9% non equalized 17% all: 40% cross-talk 14% HARP Collaboration Meeting

  22. Summary rΦ Energy HARP Collaboration Meeting

  23. Conclusions • Capacitive model applied to a full sector. • Model describes well all data, including bidirectional and all orders cross-talk. • Model fully specified by transfer functions (MEASURED) and by capacitances (COMPUTED) • 92% of cross-talk reduced on this data • ½ of the channels are clear. Assessment of performances without cross-talk ongoing. • MC result shows that the effect is 1.5 mm in resolution and 15% in energy resolution. HARP Collaboration Meeting

  24. Outlook • Apply correction algorithm on data and MC and compare residuals and energy resolution before and after correction. • Prepare benchmark set of data to compare the performances of existing algorithms (resolution, minimum bias, speed…). • Choose the best combination of algorithms (require/expect close cooperation among different groups) HARP Collaboration Meeting

More Related