Advanced Measurement Technology 142AH Operating And Service Manual - Page 8

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2.1. PERFORMANCE

NOISE Based on silicon equivalent of
= 2 µs. (See Fig. 2.1.)
Detector
Typical
Capacity
Noise
(pF)
(keV)
0
1.55
20
1.73
50
2.23
100
3.25
Typical intercept, 1.55 keV.
Typical slope, 17 eV/pF.
RISE TIME Based on a +0.5-V signal through the
E output into a 93
circuit and measured from
10% to 90% of peak amplitude; rise time
adjustment optimized;
100 pF.
CONVERSION GAIN Nominal, measured
through the E output, 45 mV/MeV.
INTEGRAL NONLINEARITY
the E output,
0.05% for 0 to ±7 V open circuit, or
±3.5 V terminated.
TEMPERATURE INSTABILITY <±50 ppm/
0 to 50
C.
DETECTOR BIAS ISOLATION
OPEN LOOP GAIN

2.2. INPUTS

Accepts input signals from
INPUT
semiconductor charged-particle detector and
extends operating bias to the detector.
BIAS Accepts the detector bias voltage from a
power supply.
TEST Accepts input voltage pulses from a pulse
generator for instrument and system calibration;
R = 93
.
in

2. SPECIFICATIONS

= 3.6 eV at
Maximum Noise
Guaranteed
(KeV)
1.75
-
-
3.6
5 ns at 0 pF,
12 ns at
Measured through
±5000V.
40,000.
2
Fig. 2.1. 142AH Typical Noise (0.5
E Furnishes the output signals through R = 93
for energy measurements; polarity is opposite
from input pulse polarity (Fig. 2.4.).
T Furnishes a differentiated output signal
compatible with typical 50
requirements; polarity is the same as the input
pulse polarity.
C,
INPUT AND BIAS
TEST, E, AND T Type BNC.
POWER CABLE 10-ft (
cable (ORTEC 121-C1); longer lengths available
from ORTEC on special order.

2.3. OUTPUTS

timing system

2.4. CONNECTORS

Type SHV.
3-m) captive power
s).
o