Multichannel Preamplifier/Discriminator PAD10
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Description

The PAD10 is a 10-channel pulse amplifier/discriminator to detect the output signals of 10 CEMs for counting purposes. It is intended to be used near the CEMs and can drive remote counters over fairly long coaxial 50 Ohm cables.

Cable length is uncritical (up to ~ 2 m), but should be chosen not unnecessarily long and be implemented with 50 Ohm coaxial cable with high shielding in order to avoid noise coupling, e.g. RG 223/U.

The PAD10 amplifies the pulses, compares them to a fixed threshold, and generates a NIM output pulse - 1 V into 50 Ohm if the threshold is overdriven.

 

  Case  
 

Aluminium (RF-shielded)

mm
155 x 442 x 45
  Output to be connected to
 

Electronic counter

  Input signal (negative pulse)
  Threshold, factory preset
mV
-5 (+/- 0.2)

 

The threshold can be adjusted by the customer individually for each channel with internal potentiometers within
mV
- 3 to - 30
  Output signal (positive pulse)
  Pulse width (nominally, pulse and interval)
half deadtime
  Pulse shape into 50 Ohm (NIM)
V
- 0.8
  Dead time, factory preset
ns
60 (+/- 5)
 
The deadtime can be adjusted by the customer with internal solder bridges to
ns
20 - 40 - 60 - 80 - 100
  Power Supply
  Power supply
Vac
90 to 250
  Fuse
A
1
  Connectors  
  Inputs (front panel)
SMA female
  Outputs (rear panel)
BNC female

 

 
Fig. 1 Front and rear view of the preamplifier / discriminator WMT PAD10
 
 
 
Fig. 2 Input connectors for 10 channel electron multipliers
 
 
 
 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 


Dr. Sjuts Optotechnik GmbH

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