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Production 2 WLS QC

Production 2 WLS QC. Howard Budd University of Rochester Rochester Meeting Oct 17 2008. 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. Light at x=0.

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Production 2 WLS QC

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

  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

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