Response of plastic scintillators in magnetic fields

The dependence of the light yield on magnetic field has been measured up to 0.45 T for the plastic scintillators NE-102A, SCSN-38, and Polivar. The scintillators were excited by 25-MeV protons, 5.9-keV X-rays, and UV light. When excited with ionizing radiation an increase of light yield is observed. For SCSN-38 of 2.7-mm thickness it amounts to 0.3%, 0.9%, 1.1%, and 3.3% at 1, 10, 100 and 450 mT, respectively. Ne-102A behaves similarly whereas a polymethyl methacrylate (PMMA)-based scintillator shows a stronger field dependence.< >