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R3788 Datasheet(PDF) 2 Page - Hamamatsu Corporation |
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R3788 Datasheet(HTML) 2 Page - Hamamatsu Corporation |
2 / 4 page MAXIMUM RATINGS (Absolute Maximum Values) CHARACTERISTlCS (at 25 °C) PHOTOMULTIPLIER TUBES R3788, R4332 NOTES A: B: C: D: E: Averaged over any interval of 30 seconds maximum. The light source is a tungsten filament lamp operated at a distribution temperature of 2856K. Supply voltage is 100 V between the cathode and all other electrodes connected together as anode. 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. 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. Measured with the same light source as Note B and with the voltage distribution ratio shown in Table 1 below. F: G: Measured with the same supply voltage and voltage distribution ratio as Note E after removal of light. 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. 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: I: J: K: 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. 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. 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. Hysteresis is temporary instability in anode current after light and voltage are applied. ENI = S 2q.ldb.G. ∆f Electrodes K Dy1 Dy2 Dy3 Dy4 Dy5 Dy6 Dy7 Dy8 Dy9 P Distribution Ratio 1 111 1 1 1111 SuppIy Voltage: 1000 V, K: Cathode, Dy: Dynode, P: Anode Table 1: Voltage Distribution Ratio (1)Light Hysteresis The tube is operated at 750 V with an anode current of 1 µA 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 V with an anode current of 0.1 µA for 5 minutes. The light is then removed from the tube and the supply voltage is quickly increased to 800 V. 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. Hysteresis = × 100 (%) lmax. li lmin. TPMSB0002EA TIME max. l min. l i l 0 5 6 7 (minutes) Value 1250 250 0.1 V V mA Unit Parameter Supply Voltage Average Anode Current A Typ. Max. Unit — — — — — — — — — — — — 50 — — — — — — % µA/lm mA/W mA/W mA/W — — A/lm A/W A/W A/W — nA W ns ns ns % % 30 (at 250 nm) 120 31 50 90 0.01 10 1200 3.1 × 105 5.0 × 105 9.0 × 105 1.0 × 107 5 1.4 × 10-16 2.2 22 1.2 0.1 1.0 Min. Typ. R4332 Max. — 100 — — — — — 500 — — — — — — — — — — — — — — — — — — — — — — — 50 — — — — — — 40 (at 210 nm) 120 60 68 90 0.01 10 1200 6.0 × 105 6.8 × 105 9.0 × 105 1.0 × 107 5 1.4 × 10-16 2.2 22 1.2 0.1 1.0 Min. R3788 Quantum Efficiency (at Peak Wavelength) Luminous B Radiant Red/White Ratio C Blue Sensitivity Index D Luminous E Radiant Anode Pulse Rise Time H Electron Transit Time I Transit Time Spread (TTS) J Light Hysteresis Voltage Hysteresis at 194 nm at 210 nm at 420 nm at 194 nm at 210 nm at 420 nm — 100 — — — — — 500 — — — — — — — — — — — Parameter Cathode Sensitivity Anode Sensitivity Gain E Anode Dark Current F (After 30 min Storage in Darkness) ENI (Equivalent Noise Input) G Time Response E Anode Current Stability K Between Anode and Cathode Between Anode and Last Dynode |
Similar Part No. - R3788_06 |
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Similar Description - R3788_06 |
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