Linear Amplifer LA 520 is a solid state pulse amplifier designed to shape and faithfully amplifies detector pre-amplifier output pulses to operable levels. Many of the Nuclear Detectors give small amplitude pulse outputs. These output pulses cannot be directly counted or analysed by scalers, countrate meters and single channel analyser, without being first amplifed. Featuring excellent non-overload characteristics, a high gain, low equivalent input noise and flexibility of pulse shaping, LA 520 is ideally suited for use with Nuclear Counting Systems such as Gammaray Spectrometers and other similar units.
This unit features compact modular construction and its power requirements are met by Instrumentation bin and power supplies including minibin and power supply MB403 of Nucleonix make or its equivalent.
|Input Polarity||Positive or Negative|
|Input Impedance||93 ohms|
|Total Gain||Typical 600 /-10% with 1 micro second time constant, Controlled by three gain controls ,Accuracy : /-10%|
|Gain Adjustment||a. Input attenuator : Attenuator factors x2.5 & x 1
b. Coarse gain : 0.2, 0.5, 1,2,3,5 & 8 by rotary switch
c. Fine gain : About adjustable by a ten turn helipot and knob/ precision dial.
|Pulse shaping||Differentiating and integration RC time constants variable from 0.1 micro second to 5 micro second in sequence of 0.5, 1, 2, 3, 6, 10 with a provision of switching integration IN/OUT|
|Amplifier Rise Time||Better than 100 nano seconds with no integration and 0.1 micro second differentiation constant|
|Output||0 to 8V positive, 12V maximum unipolar|
|Output Impedance||Approximately 93 ohms|
|Amplifier noise/th>||Equivalent input noise 10 micro volts rms typical at maximum gain and 1 microsecond integration and differentiation|
|Linearity||The integral non-linearity is less than 0.15% from 200 mV to 8 mV at 1 micro sec time constant, integration IN.|
|Power Requirement||24V at 45mA, -24V at 40mA, 12V at 20mA, -12V at 5mA|
|Dimensions||Standard two width module|
|Temperature Stability||0.01% per degree centigrade|
|Module connector||Amphenol connector type 26-159-24P-H (24 pin type) or NIM standard, as per AEC specifications TID 20893 (Rev) Type AMP 204186-5|