Photon counting unit is designed to convert single
photoelectron pulses from a photomultiplier tube into 5 V
digital signals by use of the built-in amplifier and
discriminator circuits. Photon counting with a high S/N
ratio can be performed by simply connecting a counter to
the output of the photon counting unit.
The C9744 uses a high-speed electronic circuit that
allows measurement with an excellent output linearity up
to 10
7
s
-1
. The C9744 also has a prescaler (division by
10) eliminating the need for a high-speed counter.
TACCF0195
Figure 1: Block Diagram
PULSE
AMPLIFIER
SIGNAL INPUT
(鈥?
MONITOR
(DISCRIMINATOR
LEVEL)
(+)
VR: DISCRIMINATOR
VR
PRESCALER
SW
+5 V GND -5 V
POWER INPUT
梅1, 梅10
SELECT
PRESCALER
TPHOC0056EA
COMPARATOR
PULSE
SHAPER
PULSE
STRETCHER
MULTIPLEXER
SIGNAL OUTPUT
(CMOS: +5 V)
SPECIFICATIONS
Parameter
Input Impedance
Discrimination Level (input conversion)
Required PMT Gain
Prescaler
梅1
Count Linearity
梅10
梅1
Pulse-pair Resolution
梅10
Output Pulse
梅1
Output Pulse Width
梅10
Supply Voltage
Input
Output
Connector
Power
Dimensions (W
脳
H
脳
D)
Operating Ambient Temperature
A
Storage Temperature
A
Weight
NOTE:
ANo
condensation
4
脳
1
脳
10
7
25
10
CMOS 5 V, POSITIVE LOGIC
10
Depends on count rate
+5.0 V
鹵
0.2 V, 130 mA / -5.0 V
鹵
0.2 V, 50 mA
BNC-R
BNC-R
DIN (6-pin)
B
90
脳
32
脳
140
0 to +50
-15 to +60
Approx. 250
10
6
梅1
C9744
50
-0.4 to -16
3
脳
10
6
梅10
Unit
鈩?/div>
mV
鈥?/div>
鈥?/div>
s
-1
ns
鈥?/div>
ns
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
mm
擄C
擄C
g
BSupplied
with a cable (1.5 m) attached to the mating plug.
Subject to local technical requirements and regulations, availability of products included in this promotional material may vary. Please consult with our sales office.
Information furnished by HAMAMATSU is believed to be reliable. However, no responsibility is assumed for possible inaccuracies or omissions. Specifications are
subject to change without notice. No patent rights are granted to any of the circuits described herein. 漏2006 Hamamatsu Photonics K.K.
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