On the linearity of the MINOS light-injection calibration system Academic Article uri icon


  • The MINOS light-injection calibration system has been fully documented in a previous article (Nucl. Instr. and Meth. A 492 (2002) 353). Upon commissioning in the MINOS detectors, the system was found to give a non-linear response to variations in the intensity of injected light. The source of this non-linearity has been traced to a small change in the spectrum of the injected light as a function of the current applied to the original blue LEDs, in combination with a rapidly varying spectral response function of the wavelength-shifting fibre used in the detector. Both aspects of the problem have been addressed successfully by use of LEDs with different spectral characteristics, and the system now has a linear response. © 2003 Elsevier B.V. All rights reserved.

author list (cited authors)

  • Adamson, P., Barrett, L., Belias, A., Blake, A., Cabrera, A., Falk, E., ... White, R. F.

citation count

  • 5

publication date

  • April 2004


  • Calibration
  • Led
  • Light Injection
  • Minos
  • Pmt