u/MuffinMental1587 — reddlx

Muon detection with two stacked devices

I was wondering if it is possible to detect cosmic muons (which are created by atmospheric-level events, the resulting muons then live long enough to travel down to ground level) using two stacked devices. There was a project using two stacked plastic scintillators and a coincidence detector where as I understand it, an event that occurs within a tight timeframe in the two scintillators is evidence of a muon interacting with both scintillators.

I believe that the spectrogram capture set to 1 second can timestamp individual events to 100ns accuracy so in theory I would have thought this might work... of course, you have to analyse events 'post facto' to see candidate events rather than in realtime. Unless there's a way to poll for the event file programmatically, I guess and keep retrieving the latest events on the computer end.

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u/MuffinMental1587 — 14 days ago

▲ 81 r/hpcalc

An HP67C

What? I hear you say. Well, this is an HP67 that was picked up cheap that unfortunately had a bad logic board. But not to worry. Just drop in a new logic board from teenix.org - it requires no soldering, just unplug the old one and plug the new one in.
Now we have an HP67 on steroids. Continuous memory. Optional turbo mode, runs 10X faster than the original. Bluetooth. And more. Of course, it still reads and writes the original magnetic cards (of course, card reader had to be restored but that's normal for these machines), but it can also store programs and recall them from its own internal flash memory as well. Up to 810 of them, in fact. So you can put all the standard pacs on the calculator, and still have plenty of room to spare.

u/MuffinMental1587 — 16 days ago

▲ 45 r/hpcalc

Two newly-acquired machines from the HP 'Spice' range. The last range to have LED displays. They were more fragile than the earlier 'woodstock' series and fewer of them have survived. The HP31E in particular is quite rare, as the 32E beside it was only slightly more expensive and had a lot more functions and more storage registers. These two were acquired untested, and after making two new battery packs for them, they're up and running and a nice acquisition to my collection.

u/MuffinMental1587 — 4 months ago