This document describes the features and characteristics of the R7311 and R7511 photomultiplier tubes, including sensitivity in the vacuum ultraviolet region, high quantum efficiency, and high anode sensitivity.
This document provides technical specifications for the Hamamatsu Photonics R7311 and R7511 photomultiplier tubes. These 9-stage, side-on type devices feature Cs-Te and Cs-I photocathodes respectively with MgF2 windows, optimized for vacuum ultraviolet light detection in the 115 to 320nm range.
| Photocathode Material (R7311) | Cs-Te |
|---|---|
| Window Material | MgF2 |
| Diameter | 13mm (1/2 Inch) |
| Number of Stages | 9-stage |
| Spectral Response Range (R7311) | 115 to 320nm |
| Spectral Response Range (R7511) | 115 to 195nm |
| Quantum Efficiency at 121.6nm (Typ.) | R7311: 17.3%, R7511: 26.5% |
| Anode Dark Current | 0.3 nA |
The typical quantum efficiency for the R7311 at 121.6nm is 17.3%.
These tubes are designed for vacuum ultraviolet light detection.
The tubes have a diameter of 13mm, which is equivalent to 1/2 inch.
Both models feature a 9-stage structure.