Stability Analysis of IV Measurements and Leaky Strips in Sensors at University of Rochester
This study examines the stability of IV measurements and the failure rates of sensors over time, specifically focusing on the performance of sensors produced in 2002 and 2003. Preliminary results show some instability in the I-leak measurements, with 6.8% of 2002 sensors failing retests, while 2003 sensors perform better. Factors such as sensor handling and measurement conditions are considered, including the effects of prolonged exposure on measurement accuracy and the development of leaky strips. Further investigation is recommended to assess reliability.
Stability Analysis of IV Measurements and Leaky Strips in Sensors at University of Rochester
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Presentation Transcript
TOB sensor quality Regina Demina University of Rochester
Outline • Stability of IV • Leaky strips
IV vs time 3/61 failed on retest 17/250 failed on retest Current at 400V FNAL remeasurement vs DB 0/65 failed on retest
IVCV no vacuum effect so far Sensor left on chuck for several hours between measurements 1 and 2. Just needed rest?
Summary • Some instability of I leak vs time is observed • 2002 sensors seem to be the worst, fraction of originally passed sensors failing retests –6.8% • 2003 sensors look better (but maybe not enough time) • I leak increase seems to be related to leaky strip development
