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Pulse Preamplifier/Discriminator Selection for PMTs and Electron Multipliers

Part No.: F-1T
Features: Lower and Upper discriminator
Dark pulse output < 0.5 cps
TTL output pulses
Applications: Scintillation x-ray detectors up to 1 Mcps
Part No.: F-100T
Features: 50 Mcps maximum count rate
Set and forget discriminator trimmer
TTL output pulses
High sensitivity 2A or 20 fC
Part No.: MTS-100
Features: F-100T specifications with HV decoupled Input for positively biased PMTs or EM that require +HV on the collector.
Part No.: F-100D
Features: F-100T with the discriminators level display and ten turn precision level adjustment.
Part No.: Combo-100
Features: F-100T with an input current amplifier for very high count rate applications. A low signals levels demand pulse counting, while large signals are processed as DC current. Both outputs are available simultaneously.
Part No.: F-100E
Features: 100 Mcps max. count rate preamplifier/ discriminator with complementary ECL outputs. High sensitivity 2A or 20 fC.
Part No.: F-400E
Features: The fastest preamplifier/discriminator with complementary ECL outputs. Max. count rate 400Mcps. Low input Sensitivity: 20mV

Selecting the Best Pulse Preamplifier/Discriminator for a Given Detector.

DETECTOR RECOMMENDED PREAMPLIFIER
TYPE MAX. COUNT
RATE [MHz]
MODEL MAX. COUNT
RATE [MHz]
INPUT
SENSITIVITY
OUTPUT
TYPE
COMMENT
Scintillation Counter
[NaI(Tl)]
1 MHz F-1T 1 MHz 0.25 mV TTL Low noise. Blind to PMT's high background count. Background count < 0.5 CPS. Built in PHA.
Channeltron®
Electron multiplier
10 MHz F-100T
F-100TD
MTS-100
50 MHz 2 µA TTL High sensitivity low noise.
Pulse PMT and
discrete dynodes
electron multiplier
>100 MHz F-100E >100 MHz 0.10 mV ECL 10 ns pulse pair resolution
High sensitivity.
Microchannel Plate
MCP type PMT
>400 MHz F-400E 400 MHz 20 mV ECL 2.5 ns pulse pair resolution.
Lower sensitivity.
Requires input pulse rise time < 5 ns.



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