PHOTOMULTIPLIER TUBES R331, R331-05 For Liquid Scintillation Counting Bialkali Photocathode, 51mm (2 Inch) Diameter, 12 Stages, Head-On Type The R331 and the R331-05 are 51mm (2 Inch) diameter series photomultiplier tubes specifically developed for the liquid scintillation counting. They feature low background noise, high tritium efficiency, good linearity and high gain. The R331 uses a synthetic silica input window and the R331-05 uses a low K content borosilicate glass input window, both with a frosted surface and convex-concave shape. They offer minimized glass scintillations and high collection efficiency. FEATURES Tritium efficiency in tritium window................................ 60% Typ. Background noise in tritium window...............16cpm Typ. (R331) 18cpm Typ. (R331-05) Tritium end point (T.E.P.) voltage.................................. 1700V Typ. Dark pulse summation at T.E.P. voltage.............. 3 × 104cpm Max. Figure of merit (E2/B).......................................................... 200 Typ. GENERAL Spectral Response Wavelength of Maximum Response Photo- Material cathode Minimum Useful Area Window Material Material Dynode Direct Shape R331 R331-05 Unit 160 to 650 300 to 650 nm 420 nm Bialkali — mm dia. 46 Synthetic silica Low K content — borosilicate (Frosted) glass (Frosted) — Concave-Convex Linear focused — Number of Stages 12 — Anode to Last Dynode 2 pF 2.5 pF 21-pin glass base — 151 g E678-21A (Supplied) — Structure Interelectrode Anode to All Other Capacitances Electrodes Base Weight Suitable Socket Figure 1: Typical Spectral Response TPMHB0505EA 100 CATHODE RADIANT SENSITIVITY R331 CATHODE RADIANT SENSITIVITY (mA/W) QUANTUM EFFICIENCY (%) Parameter 10 R331-05 QUANTUM EFFICIENCY 1 0.1 0.01 200 400 600 800 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 HAMAMATS U 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. © 1998 Hamamatsu Photonics K.K. PHOTOMULTIPLIER TUBES R331, R331-05 MAXIMUM RATINGS (Absolute Maximum Values) Parameter Supply Voltage NOTES Value Unit Between Anode and Cathode 2500 Vdc Between Anode and Last Dynode 500 Vdc 0.2 mA -80 to +50 °C Average Anode Current A Ambient Temperature CHARACTERISTICS (at 25°C) Parameter Luminous B Cathode Sensitivity Min. Typ. Max. Unit 60 90 — µA/lm — 25 — % at 390nm — 85 — mA/W C 9.0 10.5 — µA/lm-b Anode Luminous D 30 120 — A/lm Sensitivity Radiant at 420nm — 1.1 × 105 — A/W Gain D — 1.3 × 106 — — Anode Dark R331 — 16 — cpm — 18 — cpm — 2.6 — ns — 48 — ns — 1.1 — ns Count E Time Response D Radiant at 420nm R331-05 Anode Pulse Rise Time Electron Transit Time Transit Time Spread B: The light source is a tungsten filament lamp operated at a distribution temperature of 2856K. The light input is 0.01 lm and 150 volts are applied between the cathode and all other electrodes connected together as anode. C: 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. D: Measured with the same light source as Note B and the light input is 0.1µlm. The anode-to-cathode supply voltage and voltage distribution ratio are shown in Table 1. E: Background noise after 30 minute storage in darkness. Quantum Efficiency Blue A: Averaged over any interval of 30 seconds maximum and the whole photocathode is illuminated. F G H F: 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 of 400nm. G: The electron transit time is the interval between the arrival of a delta function light pulse at the input window of the tube and the time when the output pulse reaches the peak amplitude. In measurement the entire photocathode is illuminated. H: Also called transit time jitter. This is the fluctuation in electron transit time between individual pulses in the single photoelectron state, and may be defined as the FWHM of the frequency distribution of the transit times. Table 1: Voltage Distribution Ratio K G Dy1 Dy2 Dy3 Dy4 Dy5 Dy6 Dy7 Dy8 Dy9 Dy10 Dy11Dy12 P Electrodes 4 0 1 1.4 1 1 1 1 1 1 1 1 1 1 Distribution Ratio Supply Voltage: 1500Vdc, K: Cathode, Dy: Dynode, P: Anode, G: Grid * Shield should be connected to Dy5. Figure 3: Typical Anode Output Wave form Figure 2: Typical Anode Luminous Sensitivity and Gain TPMHB0506EA TPMHB0507EA 103 106 IN 105 RISE TIME : 2.6ns FALL TIME : 9.7ns SUPPLY VOLTAGE: 1500V INPUT LIGHT WAVELENGTH: 400nm IN OU S GA 102 GAIN 107 SE NS IT IV IT Y 104 (5mV/div) 108 104 OD E LU M 101 AN ANODE LUMINOUS SENSITIVITY (A/lm) 105 100 103 (5ns/div) 10-1 500 700 1000 1400 2000 102 3000 SUPPLY VOLTAGE (V) Figure 5: Typical Transit Time Spread Figure 4: Typical Time Response TPMHB0510EA TPMHB0508EA 200 104 ELECT RON T 60 RANS RELATIVE COUNTS 100 80 IT TIM E TIME (ns) 40 20 10 8 ANOD E PUL SE RIS E TIM 102 101 -10 E 2 1 500 103 100 6 4 SUPPLY VOLTAGE : 1500V FWHM : 1100ps INPUT LIGHT WAVELENGTH: 400nm -8 -6 -4 -2 0 2 TIME (ns) 700 1000 1400 2000 SUPPLY VOLTAGE (V) 3000 4 6 8 10 PHOTOMULTIPLIER TUBES R331, R331-05 Figure 6: Dimensional Outline and Basing Diagram (Unit: mm) 53.0 ± 1.5 FACEPLATE Socket (Supplied) (E678-21A) 46MIN. 0.2 51 50 ± 19 HA COATING 56.8 126 ± 2 PHOTOCATHODE 13 4 21 PIN BASE 5 13MAX. R5 4 DY7 3 2 DY5 1 DY3 DY1 6 SH IC DY10 DY8 IC 10 11 12 DY12 13 9 DY6 14 8 P 7 15 DY4 DY11 6 16 DY2 17 G DY9 5 TACCA0011EA 18 IC 19 20 IC 21 K IC TPMHA0072EB * Shield (SH) should be connected to Dy5. 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, P. O. Box 6910, 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.: Strada della Moia, 1/E, 20020 Arese, (Milano), Italy, Telephone: (39)02-935 81 733, Fax: (39)02-935 81 741 TPMH1209E01 JUL. 1998