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My daily work journal can be found [https://docs.google.com/a/uconn.edu/document/d/1mGxw-1p69iodf4hJz1tTTfBxgvfdGpDbZynqvXzYCLc here.]
This summer I worked primarily on Fiber QA. My daily work journal can be found [https://docs.google.com/a/uconn.edu/document/d/1mGxw-1p69iodf4hJz1tTTfBxgvfdGpDbZynqvXzYCLc here.] I'll summarize my tests here.
==Results of Preliminary Fiber Tests==
Before we could run through all bundles through QA tests, we had to calibrate and standardize the QA testing procedure. We found the following sources of error:
*'''Laser Intensity''' - if the laser is brighter, each fiber will result in a higher photon yield. Dr. Jones has compensated for this. We also found that the photon yields decrease as the pulser's 9V battery is drained.
*'''Temperature of the SiPM board''' - we found that as the fiber runs were done repeatedly without turning off the electronics and removing the board, the photon yield decreases. Automated runs resulted in variances between 3-5%
[[File:LH_prelimfibertests_temp.JPG|thumb|center|A histogram of the ratio of photon yields from each fiber compared to the average.]]
*'''Depth of the fibers in the chimney''' - We found that differences as small as 0.5 mm can have a minor affect on the photon yields.
[[File:LH_prelimfibertests_halfmm.JPG|thumb|center|A histogram of the ratio of photon yields from a fiber who was retracted 0.5 mm into the chimney compared to the a fiber flush with the chimney.]]
[[File:LH_prelimfibertests_mm.JPG|thumb|center|A histogram of the ratio of photon yields from a fiber who was retracted 1.0 mm into the chimney compared to the a fiber flush with the chimney]]