R331 HAMAMATSU | Alldatasheet

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Parameter R331-05 R331 Unit Spectral Response Wavelength of Maximum Response Photo- cathode Window Material Dynode Direct Interelectrode Capacitances Base Weight Suitable Socket nm nm mm dia. pF pF g 300 to 650 420 Bialkali Concave-Convex Linear focused 2.5 21-pin glass base 151 E678-21A (Supplied) 160 to 650 Synthetic silica (Frosted) Material Minimum Useful Area Material Shape Structure Number of Stages Anode to Last Dynode Anode to All Other Electrodes PHOTOMULTIPLIER TUBES R331, R331-05 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. © 1998 Hamamatsu Photonics K.K. Subject to local technical requirements and regulations, availability of products included in this promotional material may vary. Please consult with our sales office. For Liquid Scintillation Counting Bialkali Photocathode, 51mm (2 Inch) Diameter, 12 Stages, Head-On Type Figure 1: Typical Spectral Response TPMHB0505EA The R331 and the R331-05 are 51mm (2 Inch) diameter series pho- tomultiplier tubes specifically developed for the liquid scintillation count- ing. 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 min- imized glass scintillations and high collection efficiency. 18cpm Typ. (R331-05) 4cpm Max. Low K content borosilicate glass (Frosted) 100 0.1 0.01 200 400 600 800 WAVELENGTH (nm) CATHODE RADIANT SENSITIVITY (mA/W) QUANTUM EFFICIENCY (%) CATHODE RADIANT SENSITIVITY R331-05 R331 QUANTUM EFFICIENCY

MAXIMUM RATINGS (Absolute Maximum Values) Parameter Value Unit Supply Voltage Average Anode Current A Ambient Temperature Vdc Vdc mA 2500 500 0.2 -80 to +50 Between Anode and Cathode Between Anode and Last Dynode PHOTOMULTIPLIER TUBES R331, R331-05 CHARACTERISTICS (at 25 °C) Table 1: Voltage Distribution Ratio Parameter Min. Unit Cathode Sensitivity Anode Sensitivity Gain D Anode Dark Count E Time Response D µA/lm mA/W µA/lm-b A/lm A/W cpm cpm ns ns ns 9.0 Max.Typ. 10.5 120 1.1 × 10 1.3 × 106 2.6 1.1 Luminous B Quantum Efficiency at 390nm Radiant at 420nm Blue C Luminous D Radiant at 420nm R331 R331-05 Anode Pulse Rise Time F Electron Transit Time G Transit Time Spread H NOTES A: Averaged over any interval of 30 seconds maximum and the whole photocathode is illuminated. 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 vol- tage and voltage distribution ratio are shown in Table 1. E: Background noise after 30 minute storage in darkness. F: The rise time is the time for the output pulse to rise from 10% to 90% of the peak amplitude when the entire pho- tocathode 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. Supply Voltage: 1500Vdc, K: Cathode, Dy: Dynode, P: Anode, G: Grid * Shield should be connected to Dy5. Electrodes Distribution Ratio K G Dy1 Dy2 Dy3 Dy4 1.4 Dy5 Dy6 1111 11 PDy7 Dy8 Dy9 Dy10Dy11Dy12 111

JUL. 1998 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 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 TACCA0011EA TPMHA0072EB Figure 6: Dimensional Outline and Basing Diagram (Unit: mm) PHOTOMULTIPLIER TUBES R331, R331-05 53.0 ± 1.5 46MIN.FACEPLATE PHOTO- CATHODE HA COATING

21 PIN BASE

126 ± 213MAX. 50 ± 0.2 10 111213 2021 DY1DY3 DY5 DY2 P DY9 DY11 DY12 IC SH IC DY10 DY8 DY6 DY4 DY7 G IC IC ICK 56.8 136 Socket (Supplied) (E678-21A) * Shield (SH) should be connected to Dy5.