R7250 HAMAMATSU [Hamamatsu Corporation], R7250 Datasheet - Page 2

• Manufacturer Part Number: R7250
• Description: LARGE PHOTOCATHODE AREA PHOTOMULTIPLIER TUBES
• Manufacturer: HAMAMATSU [Hamamatsu Corporation]

NOTE: Anode characteristics are measured with the voltage distribution ratio shown below.
(
R5912
R5912-02
R7081
R7081-20
R8055
R3600-02
R7250
R5912
R5912-02
R7081
R7081-20
R8055
R3600-02
R7250
Type No.
Type No.
LARGE PHOTOCATHODE AREA PHOTOMULTIPLIER TUBES
SPECIFICATIONS
): Measured with the special voltage distribution ratio (Tapered Divider) shown below.
Cathode
(µA/lm)
Anode
2000
2000
2000
2000
2500
2500
2500
Min.
Supply Voltage
(V)
40
40
40
40
35
35
35
to
Luminous
(2856 K)
Dynode
(µA/lm)
to Last
Anode
Typ.
300
300
300
300
300
300
300
(V)
80
80
80
80
60
60
60
Cathode Sensitivity
Maximum Ratings
at 420 nm
Average
Radiant
Current
(mA/W)
Anode
(mA)
Typ.
0.1
0.1
0.1
0.1
0.1
0.1
0.1
80
80
80
80
65
65
65
Operating
-30 to +50
-30 to +50
-30 to +50
-30 to +50
-30 to +50
-30 to +50
-30 to +50
Ambient
erature
Temp-
Blue Sensitivity
Min.
(°C)
Index (CS 5-58)
6.0
6.0
6.0
6.0
5.5
5.5
5.5
-30 to +50
-30 to +50
-30 to +50
-30 to +50
-30 to +50
-30 to +50
-30 to +50
Storage
erature
Temp-
Typ.
10.0
10.0
10.0
10.0
(°C)
8.0
8.0
8.0
Efficiency
at 390 nm
Pressure
Quantum
Ambient
(Gauge)
(MPa)
Typ.
0.15
(%)
0.7
0.7
0.7
0.7
0.6
0.6
25
25
25
25
20
20
20
approx. 10
approx. 36
approx. 10
Luminous
approx. 3
approx. 3
approx. 3
approx. 3
Direct Interelectrode
Anode to
(2856 K)
Dynode
70 000
80 000
(A/lm)
3000
Typ.
(pF)
700
800
600
600
Last
Capacitances
approx. 20
approx. 40
approx. 15
Anode to
All Other
Dynodes
approx. 7
approx. 7
approx. 7
approx. 7
3.25 × 10
7.2 × 10
7.2 × 10
8.0 × 10
8.0 × 10
6.5 × 10
6.5 × 10
at 420 nm
Radiant
(pF)
Anode Sensitivity
(A/W)
Typ.
5
7
5
7
5
5
6
1.0 × 10
1.0 × 10
1.0 × 10
1.0 × 10
5.0 × 10
1.0 × 10
1.0 × 10
Gain
Typ.
7
9
7
9
7
7
7
Applied
Voltage
Typical
Gain
1500
1700
1500
1700
2000
2000
2000
Typ.
for
(V)