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 µA/lm Typ. Radiant at 410 nm .......................... 68mA/W Typ. Anode Sensitivity (at 1000V) Luminous ......................................... 500A/lm Typ. Radiant at 410 nm ................... 4.8 × 105A/W Typ. APPLICATIONS Fluorescence Spectrophotometers Emission Spectrophotometers Atomic Absorption Spectrophotometers TPMSF0073 GENERAL Figure 1: Typical Spectral Response Parameter Description/Value Unit 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 185 to 730 410 nm nm Bialkali 8 × 24 UV glass — mm Bialkali Circular-cage 9 — — — TPMSB0123EA pF pF g — — CATHODE RADIANT SENSITIVITY (mA/W) QUANTUM EFFICIENCY (%) Weight Suitable Socket Suitable Socket Assembly 4 6 11-pin base JEDEC No.B11-88 45 E678-11A(option) E717-21(option) 100 10 QUANTUM EFFICIENCY 1 CATHODE RADIANT SENSITIVITY 0.1 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. ©1997 Hamamatsu Photonics K.K PHOTOMULTIPLIER TUBE R6925 MAXIMUM RATINGS (Absolute Maximum Values) Rating Unit Between Anode and Cathode 1250 Vdc Between Anode and Last Dynode 250 Vdc 0.1 mA Parameter Supply Voltage Average Anode CurrentA CHARACTERISTICS (at 25°C) Parameter Min. Typ. Max. Unit Cathode sensitivity Quantum Efficiency at Peak Wavelength — — % — — — — µ A/lm mA/W — µ A/lm-blue LuminousB Radiant at 410nm Red/White RatioC BlueD 40 — — — 23 (at 250nm) 70 68 0.02 7 Anode Sensitivity LuminousE Radiant at 410nm 200 — 500 4.8 × 105 — — A/lm A/W — 7.1 × 106 — — — 5 50 nA — 2.2 × 10-16 — W Time Response Anode Pulse Rise TimeH Electron Transit TimeI Transit Time Spread (TTS)J — — — 2.2 22 1.2 — — — ns ns ns Anode Current StabilityK Light Hysteresis Voltage Hysteresis — — 0.1 1.0 — — % % Gain F Anode Dark Current (After 30 minutes storage in the darkness) ENI (Equivalent Noise Input) G E 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. Table 1: Voltage Distribution Ratio Electrode K Dy1 Dy2 Dy3 Dy4 Dy5 Dy6 Dy7 Dy8 Dy9 P Distribution 1 1 Ratio Supply Voltage=1000Vdc K:Cathode Dy:Dynode 1 1 P:Anode 1 1 1 1 1 1 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 × 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 = 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. ANODE CURRENT K: Hysteresis is temporary instability in anode current after light and voltage are applied. l max. li l min. Hysteresis = l max — l min. × 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. TIME 5 0 6 7 (minutes) TPMSB0002EA Figure 2: Typical Gain and Anode Luminous Sensitivity 105 Figure 3: Typical Time Response TPMSB0004EB TPMSB0124EB 100 108 80 60 104 107 40 TRAN SIT T 103 106 105 MINIMUM ANODE SENSITIVITY TIME (ns) TYPICAL ANODE SENSITIVITY 102 104 100 700 1000 1500 10 8 6 101 10-1 500 4 103 2 102 2000 1 RISE 700 1000 1500 Figure 5: Typical EADCI (Equivalent Anode Dark Current Input) vs. Supply Voltage TPMSB0125EA TPMSB0126EA 10-13 10-9 10-14 10-10 EADCI (lm) ENI (W) TIME SUPPLY VOLTAGE (V) Typical ENI with Wavelength 10-15 10-16 10-17 100 500 300 SUPPLY VOLTAGE (V) Figure 4: IME 20 GAIN ANODE LUMINOUS SENSITIVITY (A/Im) TYPICAL GAIN 10-11 10-12 200 300 400 500 600 WAVELENGTH (nm) 700 800 10-13 300 400 500 600 800 1000 SUPPLY VOLTAGE (V) 1500 PHOTOMULTIPLIER TUBE R6925 Unit: mm Figure 6: Dimensional Outline and Basing Diagram Figure 7: Socket E678-11A (Option) 28.5 ± 1.5 49 38 8MIN. DY6 6 5 1 DY1 11 K 10 P 5 DIRECTION OF LIGHT 29 Bottom View (Basing Diagram) 18 32.2 ± 0.5 9 DY9 DY2 2 3.5 80MAX. 7 DY7 8 DY8 DY3 3 94MAX. 49.0 ± 0.25 24MIN. DY4 4 33 DY5 PHOTOCATHODE 4 T9 BULB 11 PIN BASE JEDEC No.B11-88 TACCA0064EA TPMSA0005EB Figure 8: D Type Socket Assembly E717-21 (Option) PMT 3.5 33.0 ± 0.3 5 SOCKET PIN No. 10 P DY9 38.0 ± 0.3 49.0 ± 0.3 R10 C3 R9 C2 R8 C1 SIGNAL GND SIGNAL OUTPUT RG-174/U (BLACK) POWER SUPPLY GND AWG22 (BLACK) 9 DY8 8 DY7 7 R7 DY6 6 DY5 5 DY4 4 DY3 3 HOUSING (INSULATOR) DY2 2 POTTING COMPOUND DY1 K 1 4 29 R6 R to R10 : 330kW C1 to C3 : 0.01mF R5 450 ± 10 L R4 31.0 ± 0.5 R3 R2 R1 11 Type No. L E717-21 41 ± 0.5 E717-63 30 ± 0.5 -HV AWG22 (VIOLET) TACCA0002EC * 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: Färögatan 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)