PHOTOMULTlPLlER TUBES R928, R955 Extended Red, High Sensitivity, Multialkali Photocathode 28mm (1-1/8 Inch) Diameter, 9-Stage, Side-On FEATURES Wide Spectral Response R928 ........................................................ 185 to 900 nm R955 ........................................................ 160 to 900 nm High Cathode Sensitivity Luminous ...................................................... 250 A/lm Radiant at 400nm ............................................. 74mA/W High Anode Sensitivity (at 1000V) Luminous ........................................................ 2500A/lm Radiant at 400nm ..................................... 7.4 105 A/W Low Drift and Hysteresis The R928 and R955 feature extremely high quantum efficiency, high current amplification, good S/N ratio and wide spectral response from UV to near infrared. The R928 employs a UV glass envelope and the R955 has a fused silica envelope for UV sensitivity extension. The R928 and R955 are well suited for use in broad-band spectrophotometers, atomic absorption spectrophotometers, emission spectrophotometers and other precision photometric instruments. GENERAL Spectral Response R928 R955 Wavelength of Maximum Response Figure 1: Typical Spectral Response Description/Value Unit 100 185 to 900 160 to 900 nm nm 400 nm Photocathode MateriaI Minimum Effective Area Multialkali 8 24 Window Material R928 R955 UV glass Fused silica mm Dynode Secondary Emitting Surface Structure Number of Stages Direct Interelectrode Capacitances Anode to Last Dynode Anode to All Other Electrodes Base Weight SuitabIe Socket SuitabIe Socket Assembly Multialkali Circular-cage 9 Approx. 4 Approx. 6 11-pin base JEDEC No. B11-88 Approx. 45 TPMSB0001EB CATHODE RADIANT SENSITIVITY R955 CATHODE RADIANT SENSITIVITY (mA/W) QUANTUM EFFICIENCY (%) Parameter 10 R928 QUANTUM EFFICIENCY 1 0.1 pF pF 0.01 100 200 g 300 400 500 600 700 800 900 1000 WAVELENGTH (nm) E678–11A (option) E717–21 (option) Subject to local technical requirements and regulations, availability of products included in this promotional material may vary. Please consult with our sales office. lnformation furnished by HAMAMATS U is believed to be reliabIe. However, no responsibility is assumed for possibIe inaccuracies or ommissions. Specifications are subject to change without notice. No patent right are granted to any of the circuits described herein. © 1997 Hamamatsu Photonics K.K. PHOTOMULTlPLlER TUBES R928, R955 MAXIMUM RATINGS (Absolute Maximum Values) Parameter Value Unit Between Anode and Cathode 1250 Vdc Between Anode and Last Dynode 250 Vdc 0.1 mA Supply Voltage Average Anode Current Ambient Temperature –80 to +50 CHARACTERISTlCS (at 25 ) Parameter R928 Typ. Min. Cathode Sensitivity Quantum Efficiency at Peak Wavelength Luminous B Radiant at 194nm 254nm 400nm 633nm 852nm Red/White Ratio C Blue D 140 0.2 Anode Sensitivity Luminous E Radiant at 194nm 254nm 400nm 633nm 852nm 25.4 (at 260nm) 250 18 52 74 41 3.5 0.3 8 400 Anode Dark Current F After 30 minute Storage in the darkness 400 1.3 Time Response E Anode Pulse Rise Time I Electron Transit Time J Transit Time Spread (TTS) K Unit A/lm mA/W mA/W mA/W mA/W mA/W 2500 4.3 105 5.6 105 7.4 105 4.1 105 3.5 104 A/lm A/W A/W A/W A/W A/W 50 1.3 % A/lm-b 107 3 10-16 Max. 29.0 (at 220nm) 250 43 56 74 41 3.5 0.3 8 1.0 3 ENI(Equivalent Noise Input) H 0.2 107 1.0 R955 Typ. Min. 140 2500 1.8 105 5.2 105 7.4 105 4.1 105 3.5 104 Gain E Anode Current Stability Current Hysteresis Voltage Hysteresis Max. 10-16 50 nA W 2.2 22 1.2 2.2 22 1.2 ns ns ns 0.1 1.0 0.1 1.0 % % L 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-5-58 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 Distribution Ratio K Dy1 Dy2 Dy3 Dy4 Dy5 Dy6 Dy7 Dy8 Dy9 1 1 1 SuppIy Voltage : 1000Vdc K : Cathode, Dy : Dynode, 1 1 1 P : Anode 1 1 1 P 1 F: Measured with the same supply voltage and voltage distribution ratio as Note E after removal of light. G:Measured at a supply voltage adjusted to provide an anode sensitivity of 100 A/lm. H: 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. ENI = 2q.ldb.G. f S q = Electronic charge (1.60 10-19 coulomb). ldb = Anode dark current(after 30 minute 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. I: 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. where J: 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. K: 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 L: Hysteresis is temporary instability in anode current after light and voltage are applied. l max. li l min. lmax. Hysteresis = lmin. 100(%) li (1)Current 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 micro-ampere 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 re-illuminated for a minute to measure the variation. TIME 5 0 6 7 (minutes) TPMSB0002EA Figure 2: Anode Luminous Sensitivity and Gain Characteristics TPMSB0003EB 108 100 IT IV 60 IT NS 107 TRAN IT SE IV SIT T IT E NS SE 106 IN IM GAIN E OD AN UM 105 10 8 6 M 100 IME 20 TIME (ns) OD AN L GA CA L PI CA TY TY PI 101 IN 102 40 Y ANODE LUMINOUS SENSITIVITY (A/lm) 103 TPMSB0004EB 80 Y 104 Figure 3: Typical Time Response 104 4 10–1 RISE TIME 103 2 10–2 200 500 300 700 102 1500 1000 1 500 300 SUPPLY VOLTAGE (V) 700 1000 1500 SUPPLY VOLTAGE (V) Figure 4: Typical Temperature Coefficient of Anode Sensitivity Figure 5: Typical Temperature Characteristic of Dark Current (at 1000V, after 30minute storage) TPMSB0005EA TPMSB0006EA 160 100 800nm 140 600nm ANODE DARK CURRENT (nA) ANODE SENSITIVITY (%) 120 400nm 100 80 60 40 10 1 0.1 20 0 0.01 –40 –20 0 +20 TEMPERATURE (°C) +40 –40 –20 0 +20 TEMPERATURE (°C) +40 PHOTOMULTlPLlER TUBES R928, R955 Figure 6: Dimensional Outline and Basing Diagram (Unit : mm) 28.5 1.5 T9 BULB 8MIN. Hybrid Assembly of R928 H957-08 PHOTOCATHODE DY5 5 DY6 6 7 94MAX. 80MAX. 8 DY8 DY3 3 49.0 2.5 24MIN. DY4 4 DY7 DY2 The H957-08 integrates on R928, a voltage-divider circuit, and a high voltage power supply into a compact magnetic shield case. It can be readily operated by input of 15Vdc. 9 DY9 2 10 P 1 DY1 11 K DIRECTION OF LIGHT BOTTOM VIEW (BASING DIAGRAM) 32.2 0.5 11 PIN BASE JEDEC No. B11-88 TPMSA0008EA Figure 7: Optional Accessories (Unit : mm) Socket D Type Socket Assembly E717-21 (E678 – 11A) 49 38 PMT 3.5 10 DY9 3.5 DY8 38.0 0.3 5 49.0 0.3 DY7 4.8 41.0 0.5 450 10 4 18 R10 C3 R9 C2 R8 C1 SIGNAL GND SIGNAL OUTPUT RG-174/U (BLACK) POWER SUPPLY GND AWG22 (BLACK) 9 8 7 R7 29 29 SOCKET PIN No. P 33 33.0 0.3 5 DY6 6 DY5 5 DY4 4 DY3 3 DY2 2 DY1 K 1 R6 R to R10 : 330k C1 to C3 : 0.01 F R5 31.0 0.5 R4 HOUSING (INSULATOR) POTTING COMPOUND R3 R2 R1 11 –HV AWG22 (VIOLET) TACCA0064EA Hamamatsu also provides C4900 series compact high voltage power supplies and C6270 series DP type socket assemblies which incorporate a DC to DC converter type high voltage power supply. TACCA0002ED Warning–Personal Safety Hazards Electrical Shock–Operating voltages applied 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 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 TPMS1001E06 MAY. 1997