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Metal package PMT with Cooler
Photon Counting Head H7421 Series
The H7421 series are photon counting head devices containing a metal package photomultiplier tube having a GaAsP/GaAs photocathode and a thermoelectric cooler. The thermoelectric cooler reduces thermal noise generated from the photocathode which also offers a high quantum efficiency, allowing measurement to be made with a good S/N ratio even at very low light levels. The H7421-40 has high sensitivity on wavelength from 300 nm to 720 nm. The H7421-50 is sensitive over a wide spectral range from 380 nm to 890 nm. The photomultiplier tube is maintained at a constant temperature by monitoring the output from a thermistor installed near the photomultiplier tube and regulating the current to the thermoelectric cooler.
Heatsink with fan (A7423) sold separately
Product Variations
Type No. H7421-40 H7421-50 Spectral Response 300 nm to 720 nm 380 nm to 890 nm Features GaAsP photocathode, QE 40 % at peak wavelength GaAs photocathode, QE 12 % at peak wavelength
Specifications
Parameter Input Voltage Max. Input Voltage for Main Unit Max. Input Current for Main Unit Max. Input Voltage for Thermoelectric Cooler Max. Input Current for Thermoelectric Cooler Effective Area Peak Sensitivity Wavelength Count Sensitivity Count Linearity *1 Typ. Dark Count *2 *3 Max. Pulse-pair Resolution Output Pulse Width Typ. Output Pulse Height *4 Min. Recommended Load Resistance Signal Output Logic Operating Ambient Temperature Storage Temperature Weight
H7421-40 +4.5 to +5.5 +6 50 2.6 2.2 5 580 7.8 x 105 1.5 x 106 100 300 70 30 3.6 3.0 50 Positive logic +5 to +35 -20 to +50 340
H7421-50
800 3.9 x 105 1.5 x 106 125 375
Unit V V mA V A mm nm -1*pW-1 s s-1 s-1 ns ns V -- C C g
*1: Random pulse, at 10 % count loss *2: PMT setting temperature 0 C, used with C8137, M9011 and A7432 *3: After 30 minute storage in darkness *4: With input voltage +5 V, Load resistance 50 and Coaxial cable RG-174/U (450 mm)
Cooling Specifications
Parameter Cooling Method Max. Cooling Temperature (T) *5 Cooling Time *5
*5: Input current to thermoelectric cooler = 2.0 A
H7421-40/H7421-50 Thermoelectric cooling 35 Approx. 5
Unit -- C min
40
Photon Counting Heads
Characteristics (Count sensitivity, Dark count)
106
TPHOB0042ED
H7421-40 H7421-50
1000
TPHOB0046EB
COUNT SENSITIVITY (s-1*pW-1)
DARK COUNT (s-1)
105
H7421-50 (when used with C8137, A7423)
100
H7421-40 (when used wih C8137, A7423)
104
103
10
5
10
15
20
25
30
35
40
45
AMBIENT TEMPERATURE (C)
102 300
400
500
600
700
800
900
1000
WAVELENGTH (nm)
Block Diagram
POWER INPUT for THERMOELECTRIC COOLER THERMISTOR
AMP COMPARATOR + THERMOELECTRIC COOLER PMT HV POWER SUPPLY VOLTAGE DIVIDER CIRCUIT - LLD.
PULSE SHAPER OUTPUT TO PULSE COUNTER RL = 50
POSITIVE LOGIC
GND
+5 V
TPHOC0042ED
Dimensional Outlines (Unit: mm)
8-M3 DEPTH: 2 POWER INPUT TAJIMI PRC03-23A10-7M ACROSS SECTION
WINDOW PHOTOCATHODE 5
26.0 0.2
22.2 0.2
M25.4 P=1/32" C-MOUNT
10.2
7.2
PMT
18.5 0.2
25.4 0.2
53.6 0.2 TOP VIEW SIGNAL OUTPUT BNC-R
15.0 0.2
4.0 0.1 6.4 0.2 7.4 0.2 14.8 0.2 16.3 0.2
O-RING GROOVE (S-28 O-RING INCLUDED) 4-M2 DEPTH: 2 4-M3B 36.0 0.3 20.0 0.2 20.0 0.2
PHOTOCATHODE 8-M3C A
5
BCROSS SECTION
CCROSS SECTION
6.5 0.2
M3 DEPTH: 4.0 Max.
2.0 0.2
M3 DEPTH: 4.0 Max.
GUIDE MARK 16.3 0.2 19.0 0.2 25.0 0.2 104 1 SIDE VIEW
F EG D C A B
9.5 0.1 44.0 0.2 56.0 0.3 FRONT VIEW
M25.4 P = 1/32" C-MOUNT
A: THERMISTOR 1 B: THERMISTOR 2 C: THERMOELECTRIC COOLER + D: THERMOELECTRIC COOLER - E: Vcc LOW VOLTAGE INPUT(+5 V) F: IC* G: GND
*IC: Internal Connection (Do not use)
TPHOA0021EC
TAJIMI PRC03-23A10-7M
41
Metal package PMT with Cooler
Options for H7421 Series
1 4
OPTICAL FIBER
OPTICAL FIBER ADAPTER A7412
HEATSINK with FAN A7423
2
SOLD SEPARATELY
POWER SUPPLY UNIT with TEMPERATURE CONTROL M9011
6
CN01 CHK1
6
DIRECT INPUT
POWER SUPPLY UNIT with TEMPERATURE CONTROL C8137
5
SAMPLE
C-MOUNT LENS
C-MOUNT ADAPTER A7413
PHOTONCOUNTING HEAD H7421 SERIES
3
ON ON
SIGNAL CABLE E1168-05
COUNTER
G Heatsink with Fan A7423
The temperature of the H7421 outer case rises due to the thermoelectric cooler housed in the case. The A7423 heatsink efficiently radiates away this heat to prevent a temperature rise in the H7421. The A7423 can be easily installed onto the H7421 with four M3 screws. Apply a coat of heat conductive grease onto the joint surface shared by the H7421 and A7423. Parameter Value Unit Input Voltage V 12 During Lock mA 140 Input Current mA 90 During Operation V 10.2 to 13.8 Operating Voltage g 120 Weight
G Signal Cable E1168-05
This signal cable comes attached to a BNC connector for easily connecting the H7421 to external equipment.
G Optical Fiber Adapter (FC Type) A7412
The A7412 is an FC type optical fiber connector that attaches to the light input window of the H7421. The A7412 can easily be secured in place with four M2 screws.
G C-Mount Adapter A7413
The A7413 mount adapter is used when a C-mount lens protruding 4 mm or more from the flange-back must be installed onto the H7421.
G Power Supply Unit with Temperature Control M9011
The M9011 is an on-board type power supply unit. By just connecting to 12 V supply, the M9011 provides power necessary to operate the H7421 series. The M9011 also controls the thermoelectric cooler in the H7421 series so that the output and noise can be maintained at constant levels even when the ambient temperature changes. The thermoelectric cooler and PMT operation can be controlled from an external device by connecting it to the I/O connector on the M9011. Parameter Value 35 Max. Cooling Temperature (T) 12 Input Voltage 1.2 Max. Input Current 15.8 Max. Power Consumption 5 Main Circuit Output Voltage 2.2 Max. Output Current for Thermoelectric Cooler 12 Output Voltage for Fan Thermoelectric Cooler Non-insulated TTL level input Control Signal PMT Non-insulated TTL level input Input Voltage Fan Non-insulated TTL level input Error Signal Thermoelectric Non-insulated TTL level output Output Voltage Cooler PMT 5 LED Output Error 5 0 Setting Cooling Temperature 120 Weight (excluding cables) 42 Unit C V A V*A V A V -- -- V C g
G Power Supply Unit with Temperature Control C8137
The C8137 is a power supply unit with a temperature control function. Just connecting to an AC source of 100 V to 240 V generates the output voltages for the thermoelectric cooler and the A7423 fan, needed for operating the H7421. The photomultiplier tube temperature can be maintained to 0 C by monitoring the thermistor and regulating the output current for the thermoelectric cooler. Parameter Max. Cooling Temperature (T) Setting Cooling Temperature (preset at factory) Input Voltage Input Voltage Frequency Power Consumption Main Circuit Output Voltage Max. Current for Thermoelectric Cooler Output Voltage for Fan Weight Value 35 0 AC 100 to AC 240 50/60 30 +5 2.2 12 1 Unit C C V Hz V*A V A V kg
ON
SW2
SW1
2345
CABLES (Included with M9011 or C8137)
GND
Vcont
CHK2
CHK3
Don't use
CHK4 CN5
Vcont-ADJ CN04 CN03
INPUT 12 V
1
INPUT AC 100 V to AC 240 V
TPHOC0040EE
Photon Counting Heads H7421 Series
Options (Unit: mm)
1 Heatsink with Fan A7423
LEAD LENGTH 50 10
4 Optical Fiber Adapter (FC Type) A7412
4- 2.2 4 TAPERED DEPTH 1.5 2.5 M8 P=0.75
16.5 0.3 22.2 0.2
52.0 0.5
9.5 15 FRONT VIEW
3.0 4-M2 L=3
5.5 3 9 SIDE VIEW
LIGHT SHIELD SHEET (THICKNESS: 0.5)
TOP VIEW 4-M3 (SUPPLIED)
TACCA0190EB
5 C-Mount Adapter A7413
24.5 0.5 40 1
8
30
92.0 0.5 SIDE VIEW
TACCA0188ED
4 14
TACCA0191EA
2 Power Supply Unit with Temperature Control M9011
70.0 0.1 4-M2 15.0 0.1 28.0 0.2
6 Power Supply Unit with Temperature Control C8137
POWER PHOTOSENSOR SWITCH
40.0 0.1
SW1 CN01 ON
50.0 0.2
ON ON
SW2
1
2345
CN03
160.0 0.5 FRONT VIEW 46.0 0.5
CN5 CHK1 CHK2 CHK3 CHK4
CN04
GND
Vcont
Don't use
Vcont-ADJ
5.0 0.1
100.0 0.3
22
19.2 0.3
53.6 0.3
JST XMR-02V
M25.4 P=1/32" C-MOUNT
M25.4 P=1/32" C-MOUNT
FAN CABLE 1500 50
212 1 SIDE VIEW MODULE OUTPUT AC INPUT
12.5
MODULE CABLE 1500 50 POWER CABLE 1000 50 EXTERNAL I/O CABLE
FAN OUTPUT REAR VIEW FUSE
POWER CABLE
1000 50
1500 -0
+50
EXTERNAL I/O HOUSING
TACCA0252EA
FAN CABLE 1500 -0
+50
AC CABLE
3 Signal Cable E1168-05
1800 to 2000
TACCA0237EB
BNC-P
1500 -
+50 0
BNC-P
TACCA0148EA
8
42
6
43

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