N. Saoulidou, Fermilab 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

• 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

Mean vs DAC value

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.