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Spectroscopy Amplifier (A 225)
  Introduction
A225 Spectroscopy Amplifier is a high performance pulse shaping
amplifier, ideally suited for use with nuclear radiation detectors
such as HPGe, silicon surface barrier and Si (Li) detectors.
This is a single width NIM module with differential input
and unipolar and bipolar outputs. The unipolar output is stabilised
with a gated baseline restorer. A pile-up reject (PUR) output
is provided to facilitate experiments at high count rate.
Salient Features
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Input
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Option for diffential or single ended input
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Pulse shaping
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7-pole quasi-gaussian and quasi- triangular
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Gated baseline restorer
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Stabilises unipolar output baseline
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Pile-up rejection
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Provides PUR signal for ADC
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Performance Specifications
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Gain Range
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Continuously variable from x4 to x1500.
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Shaping time
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0.5, 1, 2, 3, 6 and 10 micro sec.
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Input Noise
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5 microvolt r.m.s. with 3 micro sec. shaping time.
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Overload
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Recovers to within 2 % of baseline in 15x shaping time
from x200 overload.
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Integral nonlinearity
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< 0.05% from 0 to 10V.
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Crossover Walk
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Bipolar zero cross over walk is < ± 3nsec.
in 50:1 dynamic range .
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Applications
- In nuclear pulse height spectroscopy
- In nuclear timing spectroscopy
- Counting Systems
For further information please contact
:
Head,
Technology Transfer & Collaboration Division,
Bhabha Atomic Research Centre,
Trombay, Mumbai - 400 085
Tel : 091-022-25505337/25593897
Fax : 091-022-25505151
E-mail : headttcd@barc.gov.in
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