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Study of the QIE Response (Current Injection Mode) & development of diagnostic tools.

Study of the QIE Response (Current Injection Mode) & development of diagnostic tools. 02-13-2004. Outline. Study of the QIE response using CalDet Near Cal Check Runs and define “pathologies” related with : RMS Linearity Number of Current Injection Points

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Study of the QIE Response (Current Injection Mode) & development of diagnostic tools.

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  1. Study of the QIE Response (Current Injection Mode) & development of diagnostic tools. 02-13-2004 N. Saoulidou, Fermilab

  2. Outline • Study of the QIE response using CalDet Near Cal Check Runs and define “pathologies” related with : • RMS • Linearity • Number of Current Injection Points • Number of entries used for each Point • Implementation of this analysis in the QieCalibration Module in order to develop diagnostic tools for the ND electronics. • “Results” from a Near Cal Check Run at the New Muon Lab ( 9 ND Plane Integration Test) • Summary – on going work N. Saoulidou, Fermilab

  3. Definition of “bad” and “suspicious” channels( QIE or QIE response Pathologies) • Rms : • Definition of “bad” channels : rms greater than maximum in at least 8 of the 37 different DAC values. • Definition of “suspicious” channels : rms greater than maximum in any of the 37 different DAC values. • Linearity : • Definition of “bad” channels : Chi-square of the fit (mean vs dacval ) > 10. • Entries : • Definition of “bad” channels: Missing entries for each QIE calibration point (256 in total 64 for each CAPID). • Calibration Points : • Definition of “bad” channels : Missing some of the 37 different calibration points N. Saoulidou, Fermilab

  4. Example of “Bad” channels from a NCC Run @ the New Muon Lab : Graphical Display • caltree->Draw(“minderch:masterch”,” badrms”,”colz”) • This turned out to be a single menu problem (the first one that all the rest 15 in that particular minder used as a reference) and we replaced the minder. N. Saoulidou, Fermilab

  5. “Bad” channels : Text files • Running the QieCalibration Module 5 text files are generated: • bad_channels_rmsxx.dat Large RMS in most 37 DAC values • suspicious_channels_xx.dat Large RMS anywhere • bad_channels_chisqxx.dat Large chi-square • bad_channels_entriesxx.dat Missing Entries • bad_channels_dataxx.dat Missing Calibration Points • These files contain : • master • minder channel • master channel • crate • module • Strip & Plane • DAC value • PATHOLOGY RELATED INFO (rms, chi-square, entries, calibration points) N. Saoulidou, Fermilab

  6. Example of a particularly “Bad” channel from a NCC Run @ the New Muon Lab Mean vs DAC value • This particular channel was flagged as “bad” by examining the info in the output text files. It appeared in nearly all text files as having : • Large chi-square • Missing entries • Missing data points N. Saoulidou, Fermilab

  7. Summary & on going work • The study of the QIE response in Near Cal Check runs reveals potential “pathologies” related with large rms’s, deviations from the linear behavior, and other calibration (or QIE response) pathologies. • 122 NCC Runs from CalDet have already been checked and only 2/1440 channels show problems with large Rms's and another 2/1440 had missing entries for a particular run and a particular DAC value (I will give a detailed update in near future). • The development of these diagnostic tools for CalDet applies for the ND running as well and is already used at the 9 Plane Integration Test @ the New Muon Lab. • I plan on switching again at the study of the QIE response time stability using the NCC CalDet Runs. N. Saoulidou, Fermilab

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