R821

PHOTOMULTIPLIER TUBE R821 For Astro-physics and Other Ultraviolet Radiation Detection Solar Blind Response (160nm to 320nm), Cs-Te Photocathode 19mm (3/4 Inch) Diameter, 10-stage, Head-On GENERAL Parameter Spectral Response Wavelength of Maximum Response Material Photocathode Minimum Effective Area Window Material Structure Dynode Number of Stages Base Suitable Socket Description/Value 160 to 320 240 Cs-Te 15 Fused silica Linear focused 10 12-pin glass base E678-12L (supplied) Unit nm nm — mm dia. — — — — — MAXIMUM RATINGS (Absolute Maximum Values) Supply Voltage Average Anode Current Ambient Temperature Parameter Between Anode and Cathode Between Anode and Last Dynode Value 1250 250 0.01 -80 to +50 Unit Vdc Vdc mA °C CHARACTERISTICS (at 25°C) Parameter Min. Typ. Cathode Sensitivity 28 Radiant at 254nm — Anode Sensitivity 1.0 × 104 Radiant at 254nm 4 × 103 Gain — 3.6 × 105 Anode Dark Current (after 30min. storage in darkness) 0.3 — 2.5 — Anode Pulse Rise Time Time Response 27 — Electron Transit Time NOTE: Anode characteristics are measured with the voltage distribution ratio shown below. Max. — — — 0.5 — — Unit mA/W A/W — nA ns ns VOLTAGE DISTRIBUTION RATIO AND SUPPLY VOLTAGE Electrodes K Dy1 Dy2 Dy3 Dy4 Dy5 Dy6 Dy7 Dy8 Dy9 Dy10 Ratio 1.5 1 1 1 1 1 1 1 1 1 1 Supply Voltage: 1000Vdc, K: Cathode, Dy: Dynode, P: Anode P Subject to local technical requirements and regulations, availability of products included in this promotional material may vary. Please consult with our sa...