# Presentation: 242695

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

- 02-13-2004

- N. Saoulidou, Fermilab

## 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

## 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

## 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

## “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

## 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

## 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