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Preamplifier Selection Guides These charts are intended as selection guides only. For
complete and precise specifications, consult the data sheet for each model.
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Charged-Particle Spectroscopy with
Semiconductor Detectors |
|
Model
No. |
For
Detector Type |
Features |
Sensitivity |
Equivalent Input Noise (FWHM)* Energy |
Rise Time
(ns at pF) |
Range
(MeV)* |
E2CRP
(MeV2/s)* |
Detector Bias Resistor (MW) |
Maximum Detector Bias Voltage (Volts) |
|
(mV/MeV) |
(µV/e-h pair) |
keV at pF |
Electrons at pF |
|
142A |
Si |
Excellent timing and low
noise for 0 to 100 pF detectors; high sensitivity and small size |
45 |
0.16 |
<1.6 at 0
<3.4 at 100 |
442 at 0
939 at 100 |
<5 at 0
<12 at 100 |
0-200 |
1.5 x 107 |
100 or 10 |
±1000 |
|
142B |
Si |
Excellent
timing and low noise for detector capacitances >100 pF; small size |
20 |
0.07 |
<3.2 at 100
<19 at 1000 |
884 at 100
5249 at 1000 |
<5 at 100
<25 at 1000 |
0-100 |
3 x 107 |
100 or 10 |
±1000 |
|
142C |
Si |
Excellent
timing and low noise for detector capacitances >400 pF; small size |
20 |
0.07 |
<7.2 at 400
<27 at 2000 |
1989 at 400
7459 at 2000 |
<11 at 400
<20 at 1000 |
0-400 |
3 x 107 |
100 or 10 |
±1000 |
|
142AH |
Si |
Excellent
timing and low noise for deep detectors; high bias voltage capability and
high sensitivity |
45 |
0.16 |
<1.75 at 0
<3.6 at 100 |
483 at 0
994 at 100 |
<5 at 0
<12 at 100 |
0-100 |
1.5 x 107 |
100 or 10 |
±5000 |
|
142IH |
Si |
General-purpose, low-cost preamplifier |
45 |
0.16 |
1.9 at 0
4.6 at 100
35 at 1000 |
524 at 0
1270 at 100
9660 at 1000 |
<20 at 0
<50 at 500 |
0-100 |
7 x 107 |
100 or 10 |
±3000 |
|
*Energies are referenced
to 3.62 eV/e-h pair in silicon detectors and 2.96 eV/e-h pair in germanium
detectors. |
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Spectroscopy with Proportional
Counters |
|
Model
No. |
Type |
Features |
Sensitivity
(µV/Electron-
Ion pair) |
Equivalent Input Noise
|
Rise Time
(ns at pF) |
Output Linear Range
(V) |
Detector Bias Resistor (MW) |
Detector Bias Voltage (V) |
|
FWHM*
(Electrons at pF) |
rms*
(Electrons at pF) |
|
142IH |
PC |
General purpose, low-cost preamp suitable for use with charged-particle
detectors, scintillation detectors, or proportional counters |
0.16 |
524 at 0
1270 at 100 |
223 at 0
240 at 100 |
<20 at 0
<50 at 100 |
±7 |
100 or 10 |
±3000 |
|
142PC |
PC |
Low-noise, high-gain, charge-sensitive unit designed for use with
proportional counters |
1.0 |
<800 at 0
<1140 at 100 |
<340 at 0
<485 at 100 |
25 at 0
150 at 100 |
±7 |
30 |
±3000 |
|
*Note: FWHM = 2.35 x rms |
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Energy Spectroscopy with
Scintillation Detectors, PMTs, Electron Multipliers, Microchannel Plates,
Microchannel Plate PMTs, Channeltrons, and Photodiodes |
|
Model No. |
Features |
Sensitivity (µV/Electron) |
Noise
(rms) |
Rise
Time (ns) |
Output
Linear Range (V) |
|
113 |
Economical
parasitic-capacitance preamplifier with selectable input capacitance to vary
sensitivity |
3.6 x 10-3
to 1.5 x 10-4 |
Output noise:
<100 µV |
<60 |
±7 |
|
142A |
Fast rise time,
charge-sensitive preamplifier for energy and time spectroscopy with
microchannel plates, channeltrons, and photodiodes |
1.6 x 10-1 |
Input noise:
188 electrons at 0 pF
400 electrons at 100 pF |
<5 to 0 pF
<12 at 100 pF |
±7 |
|
142AH |
Use instead of Model 142A
when a 1000-V to 3000-V bias voltage must be supplied through the
preamplifier |
1.6 x 10-1 |
Input noise:
206 electrons at 0 pF
423 electrons at 100 pF |
<5 to 0 pF
<12 at 100 pF |
±7 |
|
142IH |
General-purpose,
charge-sensitive preamplifier; insensitive to variations in detector
capacitance |
1.6 x 10-1 |
Input noise:
223 electrons at 0 pF
540 electrons at 100 pF |
<20 to 0 pF
<50 at 100 pF |
±7 |
|
276 |
Parasitic-capacitance
preamplifier incorporated in a 14-pin PMT base for 10-stage PMTs |
1.6 x 10-3 |
Output noise:
<50 µV |
<100 |
0 to +10 |
|
296 |
Parasitic-capacitance
preamplifier incorporated with a detector bias supply in a 14-pin PMT base
for 10-stage PMTs |
2.7 x 10-4
or 1.6 x 10-3 |
Output noise:
<300 µV |
<100 |
0 to +6.5 |
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Fast Timing
and Fast Counting with Scintillation Detectors, Photomultiplier Tubes,
Electron Multipliers, Microchannel Plates, Microchannel Plate PMTs,
Channeltrons, and Photodiodes |
|
Model No. |
Features |
Gain
(V/V) |
Input Impedance
(Ω) |
Equivalent Input
Noise
(µV rms) |
Output Rise
Time (ns) |
Coupling |
Output Linear
Range (V) |
|
VT120 A/B/C |
Very fast rise
time for use with PMTs, microchannel plates, microchannel plate PMTs,
channeltrons, electron multipliers, and photodiodes |
A: 200
B: -200
C: 20 |
50 |
<20 |
<1 |
ac |
0 to -5 |
|
9301 |
Very fast rise
time for use with PMTs, microchannel plates, microchannel plate PMTs,
channeltrons, electron multipliers, and photodiodes |
10 |
50 |
<25 |
<1.5 |
ac |
>±0.7 |
|
9305 |
Fast rise time
for use with PMTs and electron multipliers. DC-coupled for baseline
stability at high counting rates |
Variable
5 to 10 |
50 |
<30 |
<3 |
dc |
±5 |
|
9306 |
Ultra-fast
rise time for use with microchannel plate PMTs, microchannel plates,
channeltrons, and photodiodes |
100 |
50 |
<100 |
0.35 |
ac |
0 to -2 |
|
9326 |
Very fast rise
time, and 10-kHz low-frequency roll-ff for use with FastFlight in TOF-MS.
Use with microchannel plates, PMTs, electron multipliers, channeltrons, and
photodiodes |
Selectable
5, 10 or 20 |
50 |
<100 |
<1 |
ac |
0 to -1 |
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