Spontaneous light emission from fibers in MINOS Academic Article uri icon

abstract

  • We report on the observation and measurements of unexpected background rates in the MINOS Far Detector. The noise level at the Far Detector is significantly greater than that expected from natural radioactivity and intrinsic photomultiplier dark current. We have conducted a series of additional tests which demonstrate that the excess rate is caused by spontaneous light emission in the wavelength-shifting fibers, which are used to read out signals from scintillator strips. This noise due to fibers exhibits an exponential fall off with time with a decay time constant of the order of 100 days. © 2005 Elsevier B.V. All rights reserved.

author list (cited authors)

  • Avvakumov, S., Barrett, W. L., Belias, T., Bower, C., Erwin, A., Kordosky, M., ... Webb, R.

citation count

  • 3

publication date

  • June 2005

keywords

  • Dark Noise
  • Fiber Readout
  • Fibers
  • Photomultipliers
  • Scintillator Readout
  • Wavelength-shifting Fibers