113 Scintillation Preamplifier

• Designed for photomultiplier tubes
• Input capacitance switch for selectable sensitivity
• Input protected
• Economical

The ORTEC Model 113 Scintillation Preamplifier is designed for use with dynode or anode signals from photomultiplier tubes. The charge in the photomultiplier output pulse is integrated on the input capacitance of the preamplifier to produce a voltage pulse. A noninverting voltage amplifier (gain »1) drives this pulse into the output load. Switch selection of the input capacity permits control of the sensitivity of the preamplifier. The input capacity of the Model 113 is ~ 45 pF plus the capacity selected by a front-panel switch (0, 100, 200, 500, or 1000 pF).

The Model 113 should be used with a shaping main amplifier, such as the ORTEC Model 460, 570 Series, 671, 672, or 590A.

A diode network prevents destruction of the input transistor if a sudden positive or negative high voltage is applied to the input.

ORDERING INFORMATION