PHOTON COUNTING UNITS
C3866, C6465
Photon counting units are 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 C3866 uses a high-speed electronic circuit that allows
measurement with an excellent output linearity up to 10
7
s
-1
. The
C3866 also has a prescaler (division by 10) eliminating the need
for a high-speed counter.
The C6465 provides an output linearity up to 10
6
s
-1
and an output
pulse width of 30 ns, making it suitable for use with a general-
purpose counter.
COMBINATION EXAMPLE
D-TYPE SOCKET ASSEMBLY
PHOTON
COUNTING UNIT
C3866
C6465
±5
V
C3830
or
C4720
HIGH/LOW VOLTAGE
POWER SUPPLY
PHOTON
COUNTING BOARD
M7824
M8503
IBM-PC/AT
COMPATIBLE PC
(OS: Windows
Me/98SE/98/95)
Left: C3866, Right: C6465
PMT
ISA
BUS
+/-HV
TPHOC0005EA
SPECIFICATIONS
Parameter
Input Impedance
Discrimination Level (Converted Into Input)
Gain Requierd in PMT (Recommendation)
Prescaler
÷1
Maximum Count Rate
÷10
(Random Pulse: -10 % deviation)
÷1
Pulse Pair Resolution
÷10
Output Pulse
C
÷1
Output Pulse Width
÷10
Supply Voltage
Connectors
Operating Temperature
Storage Temperature
Size (W
×
H
×
D)
Weight
Input
Output
Remote
Power Supply
C3866
50
Ω
-0.5 mV to -16 mV
3
×
10
6
÷1, ÷10
A
4
×
10
6
s
-1
(Typ.)
1
×
10
7
s
-1
(Typ.)
25 ns
10 ns
TTL Compatible positive logic (C-MOS 5 V)
10 ns
Depending on count rate
+5.2 V
±
0.2 V, 150 mA
-5.2 V
±
0.2 V, 300 mA
BNC
BNC
BNC
HIROSE SR30-10R-4S
D
0
°C
to +40
°C
-15
°C
to +60
°C
88 mm
×
32 mm
×
170 mm
Approx. 320 g
C6465
50
Ω
-2.2 mV to -31 mV
5
×
10
6
—
B
1
×
10
6
s
-1
(Typ.)
B
60 ns
B
TTL Positive logic
30 ns
B
+5 V
±0.2
V, 60 mA
-5 V
±0.2
V, 120 mA
BNC
BNC
—
DIN (6 PIN)
E
0
°C
to +40
°C
-15
°C
to +60
°C
60 mm
×
43.2 mm
×
105 mm
Approx. 250 g
NOTE:
A:
Selectable by the switch or remote control.
B:
C6465 does not have a prescaler.
C:
Output stage C3866: ADVANCED C-MOS (National Semiconductor 74AC153), C6465: ADVANCED C-MOS (TOSHIBA TC74ACT04)
D:
Fitting plug (HIROSE SR30-10PQ-4P) with cable is supplied with C3866 (1 m)
E:
Fitting plug with cable is supplied with C6465 (1.5 m)
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. ©2001 Hamamatsu Photonics K.K.
HAMAMATSU [ HAMAMATSU CORPORATION ]
