Timeline for Estimation of single photon signal from photomultiplier tube data
Current License: CC BY-SA 4.0
9 events
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| Jul 19, 2021 at 3:52 | comment | added | cZe99 | Hi @jonk, I am trying to estimate how efficient a blue LED can be used as a single-photon source. The LED light will be attenuated and I would like to measure the rate of single-photon production. I know the LED isn't a great source of single-photon but that's what I am assigned to do. Yes, I can understand the terminologies you used. But I am not quite familiar with the terms and concepts used in photometry. | |
| Jul 19, 2021 at 3:46 | vote | accept | cZe99 | ||
| Jul 17, 2021 at 21:58 | answer | added | user1850479 | timeline score: 2 | |
| Jul 17, 2021 at 18:33 | comment | added | jonk | cZ, One final note before I walk off and do other things. PMT's are usually used with scintillators. For example, placed adjacent to sodium-iodide crystals so that they can pick up on faint light impulses resulting from energetic particles passing through the scintillating crystal. If you have some other application in mind, you should be very clear and say something about the application. If this is part of a study course, you should say something about the course and where you are in it. If this is just a matter of personal curiosity, then say that, too. All this matters for a useful answer. | |
| Jul 17, 2021 at 18:19 | comment | added | jonk | cZ, also, I don't know what level of communication is appropriate. Do you know what a "work function" is, in this context? Are you familiar with electron-volts? Do you know how to calculate the energy of a photon in Joules or eV? It's important to know, because in considering an answer I don't know if I'd be "talking down," or not. The question sounds a bit "remedial" to me. But maybe that's not the case, at all. Could you disclose your level of knowledge, please? | |
| Jul 17, 2021 at 18:08 | comment | added | jonk | cZ, What exactly do you have to start with and what do you want to find? It's not really clear to me. What is your single-photon source? Or was that a rhetorical device? (You almost never want to allow ambient light near a PMT. You keep them in some very very dark place when you aren't using them. So I can't believe you are thinking of ambient light.) So what's the source? What kind of goal do you have for some as yet unknown calculation? | |
| Jul 17, 2021 at 17:52 | comment | added | Andy aka | \$1.12 \times 10^{16}\$ photons/second = 1 lumen according to your link. Does that help? | |
| Jul 17, 2021 at 17:25 | history | edited | Marcus Müller |
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| Jul 17, 2021 at 17:10 | history | asked | cZe99 | CC BY-SA 4.0 |