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PHOTOMULTIPLIER TUBE R6925
High Sensitivity Bialkali Photocathode 28mm (1-1/8 Inch) Diameter, 9-Stage, Side-On Type
FEATURES
Spectral Response ............................ 185 to 730 nm Cathode Sensitivity Luminous ........................................ 70 A/lm Typ. Radiant at 410 nm .......................... 68mA/W Typ. Anode Sensitivity (at 1000V) Luminous ......................................... 500A/lm Typ. Radiant at 410 nm ................... 4.8 x 105A/W Typ.
APPLICATIONS
Fluorescence Spectrophotometers Emission Spectrophotometers Atomic Absorption Spectrophotometers
TPMSF0073
GENERAL
Parameter Spectral Response Wavelength of Maximum Response Photocathode Material Minimum Effective Area Window Material Dynode Secondary Emitting Surface Structure Number of Stages Direct Interelectrode Capacitances Anode to Last Dynode Anode to All Other Electrodes Base Weight Suitable Socket Suitable Socket Assembly Description/Value 185 to 730 410 Bialkali 8 x 24 UV glass Bialkali Circular-cage 9 4 6 11-pin base JEDEC No.B11-88 45 E678-11A(option) E717-21(option) Unit nm nm -- mm
Figure 1: Typical Spectral Response
TPMSB0123EA
100
CATHODE RADIANT SENSITIVITY (mA/W) QUANTUM EFFICIENCY (%)
10
-- -- -- pF pF
QUANTUM EFFICIENCY 1 CATHODE RADIANT SENSITIVITY
0.1
g -- --
0.01 100
200
300
400
500
600
700
800
WAVELENGTH (nm)
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. (c)1997 Hamamatsu Photonics K.K
PHOTOMULTIPLIER TUBE R6925
MAXIMUM RATINGS (Absolute Maximum Values)
Parameter Supply Voltage Between Anode and Cathode Between Anode and Last Dynode Average Anode CurrentA Rating 1250 250 0.1 Unit Vdc Vdc mA
CHARACTERISTICS (at 25C)
Parameter Cathode sensitivity Quantum Efficiency at Peak Wavelength LuminousB Radiant at 410nm Red/White RatioC BlueD Anode Sensitivity LuminousE Radiant at 410nm Gain Anode Dark Current (After 30 minutes storage in the darkness) ENI (Equivalent Noise Input)
E G F
Min. -- 40 -- -- -- 200 -- -- -- -- -- -- --
Typ. 23 (at 250nm) 70 68 0.02 7 500 4.8 x 105 7.1 x 106 5 2.2 x 10-16 2.2 22 1.2
Max. -- -- -- -- -- -- -- -- 50 -- -- -- --
Unit % A/lm mA/W -- A/lm-blue A/lm A/W -- nA W ns ns ns
Time Response Anode Pulse Rise TimeH Electron Transit TimeI Transit Time Spread (TTS)J Anode Current StabilityK Light Hysteresis Voltage Hysteresis
-- --
0.1 1.0
-- --
% %
NOTES
A: Averaged over any interval of 30 seconds maximum. B: The light source is a tungsten filament lamp operated at a distribution temperature of 2856K. Supply voltage is 100 volts between the cathode and all other electrodes connected together as anode. C: Red/White ratio is the quotient of the cathode current measured using a red filter(Toshiba R-68) interposed between the light source and the tube by the cathode current measured with the filter removed under the same conditions as Note B. D: The value is cathode output current when a blue filter(Corning CS-558 polished to 1/2 stock thickness) is interposed between the light source and the tube under the same condition as Note B. E: Measured with the same light source as Note B and with the voltage distribution ratio shown in Table 1 below. F: Measured with the same supply voltage and voltage distribution ratio as Note E after removal of light. G: ENI is an indication of the photon-limited signal-to-noise ratio. It refers to the amount of light in watts to produce a signal-to-noise ratio of unity in the output of a photomultiplier tube. 2q*ldb*G*f S where q = Electronic charge (1.60 x 10-19 coulomb). ldb = Anode dark current(after 30 minutes storage) in amperes. G = Gain. f = Bandwidth of the system in hertz. 1 hertz is used. S = Anode radiant sensitivity in amperes per watt at the wavelength of peak response. H: The rise time is the time for the output pulse to rise from 10% to 90% of the peak amplitude when the entire photocathode is illuminated by a delta function light pulse. ENI =
Table 1: Voltage Distribution Ratio
Electrode
K Dy1 Dy2 Dy3 Dy4 Dy5 Dy6 Dy7 Dy8 Dy9 P 1 1 1 1 1 1 1 1
Distribution 11 Ratio Supply Voltage=1000Vdc K:Cathode Dy:Dynode
P:Anode
I: The electron transit time is the interval between the arrival of delta function light pulse at the entrance window of the tube and the time when the anode output reaches the peak amplitude. In measurement, the whole photocathode is illuminated. J: Also called transit time jitter. This is the fluctuation in electron transit time between individual pulses in the signal photoelectron mode, and may be defined as the FWHM of the frequency distribution of electron transit times. K: Hysteresis is temporary instability in anode current after light and voltage are applied.
Hysteresis =
l max -- l min. x 100(%) li
(1) Light Hysteresis The tube is operated at 750 volts with an anode current of 1 micro-ampere for 5 minutes. The light is then removed from the tube for a minute. The tube is then re-illuminated by the previous light level for a minute to measure the variation. (2) Voltage Hysteresis The tube is operated at 300 volts with an anode current of 0.1 microampere for 5 minutes. The light is then removed from the tube and the supply voltage is quickly increased to 800 volts. After a minute, the supply voltage is then reduced to the previous value and the tube is reilluminated for a minute to measure the variation.
ANODE CURRENT
li
l max. l min. TIME
0
5
6
7 (minutes)
TPMSB0002EA
Figure 2: Typical Gain and Anode Luminous Sensitivity
105
TPMSB0124EB
Figure 3: Typical Time Response
TPMSB0004EB
108
100 80
TYPICAL GAIN
60 107 40
TRAN SIT T IME
ANODE LUMINOUS SENSITIVITY (A/Im)
104
103 TYPICAL ANODE SENSITIVITY
106
20
102
TIME (ns)
GAIN
105 MINIMUM ANODE SENSITIVITY
10 8 6
101
104
4
RISE
TIME
100
103
2
10-1 500
700
1000
1500
102 2000
1
300
500
700
1000
1500
SUPPLY VOLTAGE (V)
SUPPLY VOLTAGE (V)
Figure 4:
Typical ENI with Wavelength
TPMSB0125EA
Figure 5: Typical EADCI (Equivalent Anode Dark Current Input) vs. Supply Voltage
TPMSB0126EA
10-13
10-9
10-14
10-10
10-15
EADCI (lm)
200 300 400 500 600 700 800
ENI (W)
10-11
10-16
10-12
10-17 100
10-13 300
400
500
600
800
1000
1500
WAVELENGTH (nm)
SUPPLY VOLTAGE (V)
PHOTOMULTIPLIER TUBE R6925
Unit: mm Figure 6: Dimensional Outline and Basing Diagram
28.5 1.5 T9 BULB PHOTOCATHODE
24MIN.
Figure 7: Socket E678-11A (Option)
49 38
8MIN. DY5 DY4 4
80MAX.
5
DY6 6
DY3 3
94MAX.
49.0 0.25
DY2 2 1 DY1 11 K
10
P
5
DIRECTION OF LIGHT Bottom View (Basing Diagram)
29
32.2 0.5 11 PIN BASE JEDEC No.B11-88
18
4
3.5
9 DY9
33
7 DY7 8 DY8
TPMSA0005EB
TACCA0064EA
Figure 8: D Type Socket Assembly E717-21 (Option)
5
33.0 0.3 3.5
PMT P
SOCKET PIN No. 10
R10 DY9 38.0 0.3 49.0 0.3 29
4
C3 C2 C1
SIGNAL GND SIGNAL OUTPUT RG-174/U (BLACK) POWER SUPPLY GND AWG22 (BLACK)
9 R9 8 R8 7 R7 6 5 4 R4 3 R3 2 R2 1 R1 11 -HV AWG22 (VIOLET)
TACCA0002EC
DY8 DY7 DY6 DY5 DY4
R6 R to R10 : 330kW C1 to C3 : 0.01mF R5
L
31.0 0.5 HOUSING (INSULATOR)
DY3 DY2 DY1 K
450 10
POTTING COMPOUND Type No. L E717-21 41 0.5 E717-63 30 0.5
* Hamamatsu also provides compact high voltage power supplies and C956 series DP type socket assemblies which incorporate a DC to DC converter type high voltage power supply.
Warning--Personal Safety Hazards Electrical Shock--Operating voltages applies to this device present a shock hazard.
HAMAMATSU PHOTONICS K.K., Electoron Tube Center 314-5, Shimokanzo, Toyooka-village, Iwata-gun, Shizuoka-ken, 438-0193, Japan, Telephone: (81)539/62-5248, Fax: (81)539/62-2205
U.S.A.: Hamamatsu Corporation: 360 Foothill Road, Bridgewater. N.J. 08807-0910, U.S.A., Telephone: (1)908-231-0960, Fax: (1)908-231-1218 Germany: Hamamatsu Photonics Deutschland GmbH: Arzbergerstr. 10, D-82211 Herrsching am Ammersee, Germany, Telephone: (49)8152-375-0, Fax: (49)8152-2658 France: Hamamatsu Photonics France S.A.R.L.: 8, Rue du Saule Trapu, Parc du Moulin de Massy, 91882 Massy Cedex, France, Telephone: (33)1 69 53 71 00, Fax: (33)1 69 53 71 10 United Kingdom: Hamamatsu Photonics UK Limted: Lough Point, 2 Gladbeck Way, Windmill Hill, Enfield, Middlesex EN2 7JA, United Kingdom, Telephone: (44)181-367-3560, Fax: (44)181-367-6384 North Europe: Hamamatsu Photonics Norden AB: Farogatan 7, S-164-40 Kista Sweden, Telephone: (46)8-703-29-50, Fax: (46)8-750-58-95 Cat. No. TPMS1034E01 Italy: Hamamatsu Photonics Italia: S.R.L.: Via Della Moia, 1/E, 20020 Arese, (Milano), Italy, Telephone: (39)2-935 81 733, Fax: (39)2-935 81 741
JUL. 1997 T Printed in Japan (1,500)

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