Notices by gigabecquerel (gigabecquerel@chaos.social)

If your switch is bouncing that means they're happy

And this one is very happy.

So here's a fun side note:
This are two gamma spectra superimposed, both from Uranium Glass samples.
They don't differ in peak energies, because both contain U238 and U235. What they do differ in is peak intensity!
The cluster from ~150 to 200 keV is noticeably smaller in one sample than in the other, which means....
One is depleted, the other one isn't!
Before 1945 depleted uranium wasn't really a thing, after that pretty much all civilian used uranium was depleted.

Hahaha, holy shit!
I got an old contamination meter on eBay and it has an alarm function. After testing it I'm 100% convinced the alarm does not warn you about radiation, but about an escaped SCP inside the counter!

And here it is!
Griebnitzsee has fewer uranium tiles than Rosenthaler Platz, but they are way more active, over twice the count rare at similar geometries. Also, I like the saturated red a lot more than the thinner orange at Rosenthaler Platz.
A beauty to behold!

Had time for another small stop at another train station 😁

You must be this tall to test your Geiger Counter

Well folks, I'm on vacation again, and you know I could not resist...

Of course I had to take some parts, namely two cathode pad planes and some readout electronics. Using all the cleaning products I could find I got them to an ok-ish state and soldered / plugged together what still looked ok.
Maybe it will be a nice desk piece once I print some holder for it.
The asics will definitely be interesting under the SEM!

Two happy sets of ASICS in the SEM.
The smaller one is preamp / shaping, the bigger one is the SCA/ADC

I once again have to come to the realization that I know fuck all about chip design.
First three pics are the SCA/ADC, starting with the LBL logo, a switched capacitor array (I think?) that didn't like my decap method and the third pic must be the SCA/ADC logic itself. I don't recognize anything there.
Fourth pic is a logo I found on the SAS, anyone recognize it?

We got a name!

Out of all the things to find at the scrapyard today I didn't expect it to be the fucking forward TPCs of the STAR detector???
Especially not in this condition 😭
Probably for the best, if they had been whole I would have had to take them home.
But man, it hurts to see any detector like this.

New toy!
I got myself a cheap chinese geiger counter, the Bosean FS-5000. Thanks to the custom RadPro firmware it becomes a damn good EDC counter!
The Firmware fixes a lot of issues I've had with cheaper counters, and from what I've heard the next revision will fix ~all nitpicks I have left 😁
A major thing for me is the battery run time, over a week of running constantly.
I'm very happy with it!

https://github.com/Gissio/radpro/

I love being stuck in traffic in public transport while said public transport is almost empty because nobody takes it because it always gets stuck in traffic BECAUSE NOBODY TAKES IT

Here's something fun, who wants to guess what this is?

No correct guesses yet... none even close 😁
Hint: One of these layers is boron coated!

Definitely getting warmer!
Hint: It is not a "counter"

Hint:
It's made to measure one kind of radiation selectively in the presence of another kind of radiation

No correct guess yet.
Here are a few more pictures: