As an addendum to yesterday's entry on Compressive MultiChannel Analyzers, one couldd also think of a way to do some type of time multiplexing of the Photo-Multiplier Tubes (PMT). The multiplexing could be performed by oscillating resistances between the dynodes or by modulating the power supply of the PMT..
Why would you want to have a technology like this one ? At the very least it could provide some rapid detection of abnormal events from a steady state background. This modulation could also be undertaken in concert with a modulation of the Random Anger Coding Scheme or the Random X-ray Collector mentioned earlier.
This entry will be added to the "These Technologies Do Not Exist" page.
4 comments:
Sarcastic title? This technology certainly does exist...
It certainly does not exist. Care for a reference ?
Igor
Hi Igor,
Sorry, didn't mean to sound condescending, and maybe I misunderstand the proposal.
If this was a passive detection would it not be described as an analogue lock-in amplifier?
http://en.wikipedia.org/wiki/Lock-in_amplifier
Or if active, a heterodyne or homodyne detection scheme?
http://en.wikipedia.org/wiki/Heterodyne_detection
Our community routinely uses active non-linear detection with PMTs to measure phase and amplitude of time-modulated photon density waves in biological tissues. For example:
http://www.lrsm.upenn.edu/pmi/papers/AGYgroup/XingdeLi/YYang97OptEng36.pdf
http://dx.doi.org/10.1117/1.1331561
David
David,
Thank you very much. I need to read on this further. Can you contact me by e-mail ?
Cheers,
Igor.
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