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9301 Fast Preamplifier

ORTEC 9301 Fast Preamplifier
  • Used with photomultipliers, electron multipliers, etc., in photon or ion counting applications
  • 1.5-ns rise time
  • Voltage gain of 10
  • Output of ±0.7 V into 50 Ω
  • Compact and lightweight

The ORTEC Model 9301 low-noise, fast-rise-time Preamplifier has been designed for use with photomultipliers, electron multipliers, and other detectors employed in photon counting, ion counting, or fast-timing applications. When connected to the detector, the 50-Ω input resistance of the Model 9301 provides a load resistance for the detector output current pulse.
  • Literature +

  • More Information +

    In addition to its fast rise time of 1.5 ns, this preamplifier has a voltage gain of 10 and an output impedance of 50 Ω. Because of its compact size and light weight, the Model 9301 is ideal for mounting directly or close to a detector. Consequently, low-level signals, which would otherwise be susceptible to pickup of noise or interference, are boosted to a suitable level for cable connection to the main amplifier. Connection to a power supply is through the 3-m (10-ft) long captive power cable furnished with the Model 9301.

    Model 9301 is fitted with a power cable connector (Amphenol 17-20090) that is compatible with other ORTEC NIM-standard modules.
  • Specifications +

      Noise     Typical     Guaranteed  
    0 pF
    100 pF
      295 rms electrons  
    450 rms electrons
      <340 rms electrons  
    <485 rms electrons
    Rise Time Based on a +0.5 V signal through either output into a 93-Ω circuit and measured from 10% to 90% of peak amplitude; 25 ns at 0 pF and 150 ns at 100 pF.
    Sensitivity Nominal, measured through either output, 4 V/pC.
    Dynamic Input Capacitance 1000 pF.
    Integral Nonlinearity ≤±0.05% for 0 to ±7 V open circuit or ±3.5 V terminated in 93 Ω.
    Output Linear Range ±7 V.
    Temperature Instability ≤±50 ppm/°C, 0 to 50°C.
    Detector Bias Isolations ±3000 V.
    Open Loop Gain ≥40,000.

    Accepts input signals from a proportional counter and extends operating bias to the proportional counter.
    Bias Accepts the bias voltage for the proportional counter from a bias supply.
    Test Accepts input voltage pulses from a pulse generator for instrument and system check and calibration; Rin = 93 Ω.

    Energy and Timing
    2 connectors furnish identical signals through 2 output paths; either or both of these outputs can be used as required, and they are interchangeable. Ro = 93 Ω through each connector, and the output polarity is opposite from the input pulse polarity (output pulse polarity is the same as bias polarity).

    Input and Bias
    Test, Energy, and Timing BNC.
    Power Cable 3-m (10-ft) captive power cable. ORTEC 121-C1; longer lengths available on special order.

    Electrical and Mechanical
    Power Required
    24 V, 30 mA; –24 V, 10 mA; +12 V, 15 mA; –12 V, 15 mA. Furnished from NIM bin and power supply through any ORTEC main amplifier or from an ORTEC Model 4002P Portable Power Supply; built-in captive cable is compatible with either source.
    Weight Net  0.65 kg (1.5 lb).   Shipping  1.3 kg (3.0 lb).
    Dimensions 4.5 X 13.2 X 10.0 cm (1.75 X 5.2 X 4.0 in.) plus 3-m (10-ft) cable.
  • Ordering Information +

    Model Description
    9301 Preamplifier

    Suggested Cable Accessories
    C-25-1/2 RG-58A/U 50-Ω Cable with two BNC male plugs; 6-in. length
    C-25-12 RG-58A/U 50-Ω Cable with two BNC male plugs; 12-ft length