Single channel Preamplifier/Discriminator PAD06DS
Home Introduction CEM Models CEM Handling Quality Assurance Preamplifier Measurement Systems

 

 

 

Description

This preamplifier/discriminator is designed for processing fast output pulses from electron multipliers up to very high count rates. The dead time is rate-independend, stable, and selectable in six steps in order to suppress multiple pulses and to allow for a precise dead time correction. The threshold is set with thumwheel switches in 100 steps. In addition to the pulse output a ratemeter output is provided, which may be used for monitoring purposes or triggering protective circuitry. The PAD06DS is housed in an RF-shielded aluminium case. Each unit is delivered with an individual measurement report.

 

  Case
 

Aluminium (RF-shielded)

mm
113 x 61 x 31
  Output to be connected to
 

Electronic counter

  Input signal (negative pulse)
  Amplitude into 50 Ohm
mV
- 3 to - 200
  Safe operating without damage
V
+/- 2
  Pulse width (FWHM)
ns
5 to 30
  Count rate (Poission distribution)
cps
up to 2 x 10e6
  Resistance, dc-coupled
Ohm
50
  Threshold, adjustable in 256 steps
mV
- 3 to 130.5
  Output signal (positive pulse)
  Resistance
Ohm
50
 
Amplitude into open circuit
V
3.2
 
Amplitude into 50 Ohm
V
1.5
  Pulse width
ns
~0.5 x (dead time)
 

Dead time switch selectable in six steps

ns
10 - 20 - 30 - 40 - 50 - 60
 
initial accuracy
ns

+/- 2 or +/- 5 % whichever is greater

 
  Stability over temperature
%
+/- 2
  Ratemeter output 0 to full scale for rates
cps
0 to 10e6
    accuracy
%
5
  Full scale to be specified with order
    positive
V
2 or 4
    negative
V
2 or 4
  Power Supply
  Power supply (no signal, no load)
V
+6 (+5.4 to -8), 60 mA typ.
   
V
- 6 (-5.4 to -8), 30 mA typ.
  Temperature range
  For specified data
°C
10 - 40
  For operation
°C
0 - 50
       
       

 

 
Fig. 1 The threshold and dead time are set with hex-code switches
 
 
Fig. 2 The ratemeter output may be used for monitoring purposes or triggering a protective circuitry
 
 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 


Dr. Sjuts Optotechnik GmbH

Am Schlehdorn 1, 37077 Goettingen, Germany Tel. + 49 (0) 551 209 95 62, Fax. + 49 (0) 551 209 95 63