Measurement of the hybrid photodiode response - Fiber optic window
- Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
- Univ. of Rochester, NY (United States)
The hybrid photodiode (HPD) will be used for the CMS HCAL readout. A fiber-optic front window is used to reduce optical cross-talk between the pixels of the multi-pixel HPD's. A mismatch of numerical aperture between optical fibers carrying light to the HPD window and the fibers composing the fiber-optic front window of the HPD could lead to light loss. The light loss would appear as a reduced effective quantum efficiency of the device. The goal of this set of measurements was to see if there was in fact a reduction in the effective quantum efficiency of the HPD's.
- Research Organization:
- Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- DOE Contract Number:
- AC02-76CH03000
- OSTI ID:
- 2878
- Report Number(s):
- FERMILAB-TM-2064; ON: DE00002878
- Country of Publication:
- United States
- Language:
- English
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