Difference between revisions of "FCALPMT"
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==PMT specifications== | ==PMT specifications== | ||
| + | see also NIM A332(1993)419-443 | ||
| + | <ul> | ||
| + | <li>The PMT are russian made 12-Stage tubes of the type FEU-84-3 with a 30mm diameter SbNa-KCs cathode</li> | ||
| + | <li>Maximum gain 2.4*10^5</li> | ||
| + | <li>Entrance window Borosilicate glass</li> | ||
| + | <ul> | ||
| + | <li>SiO2, B2O2, Na2O, K2O, AlO</li> | ||
| + | <li> Fractional weight: </li> | ||
| + | <ul> | ||
| + | <li> B=0.040064, O=0.539562, Na=0.028191, Al=0.011644, Si=0.377220, K=0.003321</li> | ||
| + | </ul> | ||
| + | <li>Density = 2.23 g/cm³</li> | ||
| + | <li>refractive indices (1.51–1.54 across the visible range)</li> | ||
| + | </ul> | ||
| + | <li>The tube outer diameter is 1.339" or 34.01mm and are about 100mm long (without the pins) </li> | ||
| + | <li>The current desing of the base has an outer diameter of 1.5" or 38.1mm with an length of about 157mm including the PMT-connector ring and the aluminum end cap.</li> | ||
| + | <li>The quantum efficiency is about 21% with a sigma of 3%<br> | ||
| − | The PMT | + | [[Image:qe_feu843.jpg]] |
| + | |||
| + | </li> | ||
| + | <li>The peak sensitivity is around 400nm</li> | ||
| + | <li>The PMT base will be a Cockroft-Walton based design. Its temperature sensitivity have been investigated [[https://halldweb.jlab.org/DocDB/0006/000657/001/PMT_temp.pdf PDF document]]</li> | ||
| + | </ul> | ||
Latest revision as of 12:40, 14 March 2017
PMT specifications
see also NIM A332(1993)419-443
- The PMT are russian made 12-Stage tubes of the type FEU-84-3 with a 30mm diameter SbNa-KCs cathode
- Maximum gain 2.4*10^5
- Entrance window Borosilicate glass
- SiO2, B2O2, Na2O, K2O, AlO
- Fractional weight:
- B=0.040064, O=0.539562, Na=0.028191, Al=0.011644, Si=0.377220, K=0.003321
- Density = 2.23 g/cm³
- refractive indices (1.51–1.54 across the visible range)
- The tube outer diameter is 1.339" or 34.01mm and are about 100mm long (without the pins)
- The current desing of the base has an outer diameter of 1.5" or 38.1mm with an length of about 157mm including the PMT-connector ring and the aluminum end cap.
- The quantum efficiency is about 21% with a sigma of 3%
- The peak sensitivity is around 400nm
- The PMT base will be a Cockroft-Walton based design. Its temperature sensitivity have been investigated [PDF document]
