Model 650 and 658 End-on PMT Housing Assembly
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The photomultiplier tube (PMT) is among the most popular photosensitive devices. Various tube types and scintillator treatments permit use of these detectors from the Extreme Vacuum Ultraviolet (EUV) through the Visible and into the near Infrared. They provide large photosensitive areas, secondary emission multiplication (high gain), low dark noise and fast time response. Photomultipliers are ideal for a broad range of spectroscopy applications.
The Model 650 provides a light tight housing for mounting 52mm end on type photomultipliers. The Model 658 accommodates 28mm end on PMTs. All end-on photomultiplier housing assemblies are provided with a socket for a specified tube, tubes are specified separately. The housing has connectors for current output and high voltage (HV) input. Some models are equipped with scintillators for vacuum ultraviolet (VUV) operation. The scintillator converts invisible vacuum ultraviolet light to a Visible light emission, easily detected by sensitive PMTs.
The Model 7640 is a good, continuously adjustable high voltage power supply for operating photomultiplier detectors. It is available with negative 1, 2 and 5kV output.
| Part Number | Description |
| 8105-0650-0* | Model 650 Vacuum use - includes 9635QB PMT and scintillator. Operates from < 30 nm - 650 nm. Provided with a mounting flange fitting McPherson slits. |
| 8105-0650-2 | Model 650 Vacuum use - includes 9558QB PMT and scintillator. Operates from < 30 nm - 900 nm. Provided with a mounting flange fitting McPherson slits. |
| 8446-1002-0 | Replacement Sodium Salicylate scintillator window for Model 650 detector assembly. |
| 8105-0658-0 | Model 658 Atmospheric use - for 1 1/8" end-on PMT's. Provided with a mounting flange fitting McPherson slits. Requires selection of PMT. |
| 8105-0658-1* | Model 658 Vacuum use - for 1 1/8" end-on PMT's. Provided with a mounting flange fitting McPherson slits and a scintillator coated window for use in the vacuum ultraviolet. Requires selection of PMT |
*Best detectors for use with sodium salicylate scintillator
Need to reduce the noise of your red sensitive photomulitplier? Inquire about cooled PMT housing assemblies. Call 1-978-256-4512 or email us today.
Choose the Model 650 and Model 658 for either atmospheric or vacuum use. Vacuum versions have scintillator equipped vacuum flanges for detection in the 30 to 300-nm region. The addition of a scintillation flange, allows the same PMT assembly to be used for many EUV and VUV applications. Ultraviolet radiation leaving the exit slit of the spectrometer passes directly to a sodium salicylate coated, vacuum tight window. The scintillator converts the impinging vacuum UV radiation to a VIS emission at about 420 nm. A conventional PMT is used to detect this secondary emission. The scintillator permits use over a broad wavelength range, about 30-nm in the extreme UV, to the Visible or near infrared cut-off of the PMT in use. Scintillator response in the 30 - 340 nm region is linear. The absolute quantum efficiency of sodium salicylate between 40 - 340 nm is approximately 65%.
| Type | Range, nm | Peak, nm | Max. Vdc | Sensitivity, uA/lm | Typ Amplification | Rise Time | Transit Time |
| 9635QB | 185 - 650 | 400 | 1600 | 80 | 0.9 x 10^6 | 10 ns | 70 ns |
| 9558QB | 185 - 900 | 280 | 1500 | 230 | 2.5 x 10^6 | 10 ns | 65 ns |
| R6095* | 300 - 650 | 420 | 1500 | 95 | 2.1 x 10^6 | 12 ns | 60 ns |
*Best detectors for use with sodium salicylate