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Side-on PMT
Photon Counting Head H8259 Series
The H8259 series are photon counting head devices containing a 28 mm (11/8") diameter side-on photomultiplier tube, high-speed photon counting circuit, and high-voltage power supply circuit. Three types of photomultiplier tubes are provided as standard lineups to meet various needs for spectral response range. The photomultiplier tube sensitive in the near IR region usually has a large dark count due to thermal noise but high S/N measurements can be obtained since a low-noise photomultiplier tube is selected. The high voltage supply for photomultiplier tube and the discrimination level are preset to optimum levels, allowing photon counting measurement by just connecting a +5 V supply. An electronic gate circuit (shutter circuit) is also included to eliminate extraneous light such as excitation light from the measurement.
Product Variations
Type No. H8259 H8259-01 H8259-02 Spectral Response 185 nm to 680 nm 185 nm to 850 nm 185 nm to 900 nm Features Low dark count in UV to visible range Low dark count in UV to near IR range High sensitivity and low dark count in UV to near IR range. Sensitive area 4 mm x 6 mm
Specifications
Parameter Input Voltage Max. Input Voltage Max. Input Current Effective Area Peak Sensitivity Wavelength 300 nm 400 nm 500 nm 600 nm 700 nm 800 nm 900 nm
Typ. Max.
H8259
H8259-01 +4.5 to +5.5 +6 80 4 x 20 430 2.7 x 105 3.3 x 105 3.2 x 105 2.3 x 105 6.8 x 104 1.6 x 104 -- 2.5 x 106 80 200 Normally ON 1/1000 C-MOS (High level: +3.5 V to +5.0 V) 1 50 s to 10 35 30 2.2 2.0 50 Positive logic +5 to +40 -20 to +50 220
H8259-02
Count Sensitivity
Typ.
400 2.1 x 105 2.6 x 105 1.9 x 105 7.5 x 104 1.5 x 103 -- -- 30 80
4x6 400 2.5 x 105 3.0 x 105 2.5 x 105 2.0 x 105 1.4 x 105 7.5 x 104 3.0 x 102 400 800
Unit V V mA mm nm
s-1*pW-1
Count Linearity *1 Dark Count *2
s-1 s-1 -- -- -- k -- kHz ns ns V -- C C g
Mode Switching Ratio Level Input Impedance Gate Width (FWHM) Repetition Rate Max. Pulse-pair Resolution Output Pulse Width Typ. Output Pulse Height *3 Min. Recommended Load Resistance Signal Output Logic Operating Ambient Temperature Storage Temperature Weight Gate Gate Input
*1: Random pulse, at 10 % count loss *2: After 30 minute storage in darkness *3: With input voltage +5 V, Load resistance 50 and Coaxial cable RG-174/U (450 mm)
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Photon Counting Heads
Characteristics (Count sensitivity, Dark count)
TPHOB0023EE
106 H8259-01
104
TPHOB0024ED
H8259-02
COUNT SENSITIVITY (s-1*pW-1)
103
H8259-02
H8259
DARK COUNT (s-1)
105
H8259-01 102
104
H8259 101
103 100
200
300
400
500
600
700
800
900
100
10
20
30
40
WAVELENGTH (nm)
AMBIENT TEMPERATURE (C)
Block Diagram
PMT AMP COMPARATOR + Vref HV POWER SUPPLY VOLTAGE DIVIDER CIRCUIT POSITIVE LOGIC RL 50 PULSE SHAPER OUTPUT TO PULSE COUNTER
Gate Timing Chart
50 s to +3.5 V to +5 V at 1 k GATE SIGNAL INPUT PMT OPERATION 0V 100 s to
ON OFF DELAY TIME: 600 ns MAX. DELAY TIME: 500 ns MAX.
MIN. GATE "OFF" TIME: 50 s
GND +5 V GATE INPUT POWER INPUT
TPHOC0023EC
TPHOC0044EB
Dimensional Outlines (Unit: mm)
27.0 0.5 5.0 0.5 38.0 0.5 EFFECTIVE AREA (H8259, -01: 4 x 20) (H8259-02 : 4 x 6) 50.0 0.5 10.0 0.5 23.0 0.8 SIGNAL OUTPUT BNC-R
2.5 -0
+1.0
1.5 - 0
+0.5
WINDOW EFFECTVE AREA (H8259, -01: 4 x 20) (H8259-02: 4 x 6)
19.0 0.5 24.0 +0.5 -0
8.0 +0.5 -0
38.0 0.8
17.2 0.5
4.5 0.3
POWER INPUT HIROSE HR10A-7R-6P 1: GND 2: Vcc +5 V 3: IC* 4: IC* 5: GND 6: GATE 0 V: OPEN, 5 V: CLOSE
*Internal Connection (Do not use)
87.0 0.5
55.0 0.5
95.0 1.0
85.0 0.5
8 WINDOW PHOTOCATHODE TOP VIEW
4-M3 DEPTH: 10 FRONT VIEW
R3
C1
2 x 2-M3 DEPTH: 10 SIDE VIEW REAR VIEW
55.0 0.5
20 -0
+2
FRONT VIEW
TPMOC0167EA
POWER CABLE WITH CONNECTOR (HIROSE HR10A-7P-6S) IS SUPPLIED WITH THE H8259 SERIES BLACK : GND RED : LOW VOLTAGE INPUT (+5 V) GREEN: GATE SIGNAL INPUT (0 V or GND: OPEN, 5 V: CLOSE)
TPHOA0027EB
700 20
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