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Photomultiplier tube

R2257

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51mm dia., Head-on type, Extended red multialkali photocathode (Effective area : 46 mm dia./Spectral response : 300 to 900 nm)

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Specifications

Type Head-on type
Tube Size Dia.51 mm
Photocathode Area Shape Round
Photocathode Area Size Dia.46 mm
Wavelength (Short) 300 nm
Wavelength (Long) 900 nm
Wavelength (Peak) 600 nm
Spectral Response Curve Code 501K
Photocathode Material Extended red multialkali
Window Material Borosilicate glass
Dynode Structure Linear-focused
Dynode Stages 12
[Max. Rating] Anode to Cathode Voltage 2700 V
[Max. Rating] Average Anode Current 0.2 mA
Anode to Cathode Supply Voltage 1500 V
[Cathode] Luminous Sensitivity Min. 140 μA/lm
[Cathode] Luminous Sensitivity Typ. 230 μA/lm
[Cathode] Red/White Ratio (R-68) Typ. 0.35
[Cathode] Radiant Sensitivity Typ. 50 mA/W
[Anode] Luminous Sensitivity Min. 15 A/lm
[Anode] Luminous Sensitivity Typ. 100 A/lm
[Anode] Radiant Sensitivity Typ. 2.2 x 104 A/W
[Anode] Gain Typ. 4.3 x 105
[Anode] Dark Current (after 30min.) Typ. 30 nA
[Anode] Dark Current (after 30min.) Max. 100 nA
[Time Response] Rise Time Typ. 2.6 ns
[Time Response] Transit Time Typ. 48 ns

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