0zelot

6 ms·

1.
by 0zelot 6y ago
The process is more involved than it seems at first, nasty toluene is required and only mentioned once in the methods section. The chemical treatment is a bit different, but I would expect similar results and difficulties as NileRed found w
2.
by 0zelot 6y ago
this some one is part of that chips' engineering team :-)
3.
by 0zelot 6y ago
The pulse detection works really quite satisfactory with the current method and for beta-decay electrons and alphas. I also prefer that the derivative is easy to understand for students since this is still mainly an educational project.
4.
by 0zelot 6y ago
In principle that is a good idea and nice digital version of analog pulse shaping. However, the pulses have a very distinctive shape (not visible in the blog post picture, but here in figure 7/9: https://www.mdpi.com/14
5.
by 0zelot 6y ago
The circuit used in the blog article is a very much simplified version of the Maxim one. And probably not so much worse in terms of signal to noise ratio: https://github.com/ozel/DIY_particle_detector/ The ion cha
6.
by 0zelot 6y ago
or one of those even cheaper 16bit USB soundcards https://github.com/ozel/DIY_particle_detector/wiki/Soundcard... I believe Steve (who wrote the blog) might have had the wrong cable for his other computer (3-
7.
by 0zelot 6y ago
just to be clear: I had not intended/endorsed any double posting. It just happened that someone submitted it as well.
8.
by 0zelot 6y ago
someone else posted this as news, discussions ongoing over here https://news.ycombinator.com/item?id=23196177
9.
by 0zelot 6y ago
thanks for pointing it out! When I had posted this initially, I had almost zero karma... ;)
10.
by 0zelot 6y ago
yes totally. There is a great DIY project for doing that https://www.fourmilab.ch/hotbits/ It's not required to have the particle energy measured for making random numbers, detecting precisely the arrival time of
11.
by 0zelot 6y ago
Yes, radon is pretty hilarious and spreads in very unexpected ways. Completely wrapping sources of radon like uranium or thorium minerals (or these bracelets containing some of that), only holds back the diffusion process for some time unle
12.
by 0zelot 6y ago
Let me just point here again to the project entries on Kitspace.org: https://kitspace.org/boards/github.com/ozel/diy_particle_det... https://kitspace.org/boards/github.com/ozel/
13.
by 0zelot 6y ago
even the alpha-spectrometer might work if soldered wisely on a regular prototyping grid. in any case, thoroughly cleaning after soldering with alcohol will help. but considering the really cheap and fast PCB productions nowadays, the hassle
14.
by 0zelot 6y ago
here you go https://www.mdpi.com/1424-8220/19/19/4264
15.
by 0zelot 6y ago
Isopropyl alcohol works well if it is of high purity (we use 96% I think). Methyl alcohol would be a really dangerous choice.
16.
by 0zelot 6y ago
also its website: http://www.cosmicwatch.lns.mit.edu In terms of difficulty to build and operate it, I would rate the discussed projects such: cloud chamber < DIY particle detector (electron-detector variant) < DIY particl
17.
by 0zelot 6y ago
Unfortunately, that video contained some flawed conclusions. I had left a comment back then. Alpha particles from natural sources like an uranium stone penetrate 50 micrometers of solid hard material at most. Let's give it maybe 100 mi
18.
by 0zelot 6y ago
this is possible! you can use a thin foil made from e.g. mylar, for example taken from a cracked-open old large foil capacitor and superglue one layer on the rim of the diode's metal case. It can then point through a hole into the outs
19.
by 0zelot 6y ago
Hey, project owner here. Glad you all enjoy this! :-) I've never built my particle detectors on a breadboard. It is extremely likely that they will oscillate or frustrate in another way. You have to keep in mind that the amplification
20.
CERN publishes instructions for building your own particle detector(twitter.com)
106 points by 0zelot 6y ago|5 comments
21.
Show HN: DIY Particle Detector, measures electrons and alpha particle energies(github.com)
5 points by 0zelot 6y ago|1 comments