Timeline for Why is photocathode damaged by excessive photocurrent due to exposure to intense light?
Current License: CC BY-SA 4.0
4 events
| when toggle format | what | by | license | comment | |
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| Jun 7, 2020 at 12:15 | vote | accept | GouldBach | ||
| Jun 6, 2020 at 18:47 | comment | added | Superfast Jellyfish | I assumed cathodes anodes and dynodes were all electrodes, perhaps I am wrong. So when I meant electrode I meant the dynode for which the electrons reaching are macroscopically large. Perhaps my understanding is rudimentary. | |
| Jun 6, 2020 at 18:27 | comment | added | garyp | Almost every photomultplier I've ever seen (I spent five years of my career years ago designing them; things may have changed) has one cathode, and one anode, and at least one dynode, usually several dynodes. There are specialty tubes that have more than one cathode, but they are not common. When you say "electrode" which of those do you mean? The cathode is negatively charged. That, plus geometry that guides electrons to the first dynode, means that practically zero electrons (not a bomardment) hit the cathode. | |
| Jun 6, 2020 at 18:06 | history | answered | Superfast Jellyfish | CC BY-SA 4.0 |