Studies of Avalanche Photodiode Performance in a High Magnetic Field
  We report the results of exposing a Hamamatsu avalanche photodiode (APD) to a 7.9 Tesla magnetic field. The effect of the magnetic field on the gain of the APD is shown and discussed. We find APD gain to be unaffected in the presence of such a magnetic field. 
J. Marler, T. McCauley, S. Reucroft, J. Swain, D. Budil and S.   Kolaczkowski