1 Production 2 WLS QC Howard Budd University of Rochester Rochester Meeting Oct 17 2008.

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Presentation transcript:

1 Production 2 WLS QC Howard Budd University of Rochester Rochester Meeting Oct

2 WLS QC, Attenuation Length Measured attenuation of fibers Dan has QCed Production 2 fiber Production 2 looks OK Looks like Prod 2 has a longer attenuation length than Prod 1

3 Light at x=0 Light Extrapolated to x=0 Prod 2 fibers are normalized to 1 Shows the amount of light accepted into the fiber No attempt to correct overall normalization between different sets of measurements PMT, HV, scintillator & source are the same Looks like Prod 1 accepts more light than Prod 2

4 Light At x=320 Note that at x=320 Prod 1 & Prod 2 fibers seem to have the same amount light. These measurements claim the longer attenuation length of production 2 is being cancel by its accepting less light.

5 Attenuation vs batch # for Prod 1 We saw this funny behavior of light vs batch number for Production 1 fibers

6 Attenuation vs Batch 13 Batches, do not see jump we saw before Dan measured some fibers from the other batches at the same time 14 R&D 1 15 R&D 2 16 TRK 1 17 TKK 2, but the fibers were left out in fluorescent lights in the tunnel for about 61/2 months. Looks like the light damaged the fibers Want to study more but I need to be sure I understand exactly what the data is for the files