Notices by gigabecquerel (gigabecquerel@chaos.social)

They say material possessions don't bring you happiness, but being sent parts of the CMS detector sure comes close 😁
This one is part of the endcap if I'm not mistaken. It's a silicon strip detector, basically a few 100 very long PIN diodes that help with identifying and tracking particles of all sorts!
It will definitely get a nice frame and end up on my wall. Thank you so much @dimin !

Oh I found a "Datasheet" for these golden ASICs!
What a delightfully cursed communication protocol.

https://cds.cern.ch/record/432224/files/p162.pdf

I got a very big PMT <3

It's amazing how much LLMs know about so many fields!
But for some reason in the field where I know my shit they're only spewing out bullshit.

How odd.

Electrons are green!

You have no idea how happy this little green light makes me

Literally shit tier setup

@kaia Haha, if everything goes wrong it will be that!
It's pressurized and filled with stainless steel spheres, sooooo...

No, it's a GM-Style Pulse Tube Cryocooler.
Well, not exactly cryo-cryo, but I'm guesstimating ~80 kelvin if all goes well.

Will this thing ever come into reality?
Who knows!
The theoretical specs sounds pretty good and it's "only" like 200€ in stock but damn I do have a lot of projects already and it would need some surrounding infrastructure but on the other hand... argh.
Why is it so easy to start new projects and get to the "spend money" phase of things, but you have to put actual work into things to get beyond that?
It's just not fair!

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?