Search found 72 matches

by stamasd
10 Jul 2019, 22:11
Forum: Introductions
Topic: FYI! Americium Sourse from Smoke Detector
Replies: 4
Views: 128

Re: FYI! Americium Sourse from Smoke Detector

Even sources with much higher activity are legal to mail not marked as radioactive if you follow the rules. In fact you are specifically instructed not to mark them as radioactive. For instance when I renew my polonium source on a yearly basis, the source I mail back has at that point about 0.8mCi o...
by stamasd
06 Jul 2019, 10:21
Forum: Shielding
Topic: Pigs might fly !
Replies: 5
Views: 155

Re: Pigs might fly !

Don't worry I'm not about to print them. I only have 2 disc sources and they have their own shield each. If/when I acquire more I'll give your design a go. :)
by stamasd
06 Jul 2019, 04:23
Forum: General discussion
Topic: 3D printed BNC cap for Hamamatsu R6095
Replies: 3
Views: 2017

Re: 3D printed BNC cap for Hamamatsu R6095

Updated design of the BNC cap for R6095 and similar 1-1/8inch tubes, since I'm planning on building some detectors soon and I didn't like the previous design anymore. Too square, new one more rounded. Cosmetic update only. The zip file contains the stl object.
by stamasd
06 Jul 2019, 02:54
Forum: Shielding
Topic: Pigs might fly !
Replies: 5
Views: 155

Re: Pigs might fly !

Well this pig might fly if you put it (empty) in your luggage. :) I checked the files, it looks like it would have 3cm of lead shielding over top and bottom but only 1cm around the sides. Still should be more than enough. Also the orientation the parts show up in slic3r as is not appropriate for pri...
by stamasd
04 Jul 2019, 23:45
Forum: Detector drivers
Topic: Laptop recommendation for mobile gamma spectroscopy: HP Elitebook 8470p
Replies: 3
Views: 96

Re: Laptop recommendation for mobile gamma spectroscopy: HP Elitebook 8470p

Thanks. I've been running more tests, so far so good. I tried to make Theremino run in emulation but so far I haven't been successful. I took the source and compiled it in an old copy of VS2008 that I had laying around after converting the project to 64bit. The resulting binary does run in Windows t...
by stamasd
03 Jul 2019, 17:48
Forum: Detector drivers
Topic: Laptop recommendation for mobile gamma spectroscopy: HP Elitebook 8470p
Replies: 3
Views: 96

Laptop recommendation for mobile gamma spectroscopy: HP Elitebook 8470p

It's not a question. I am recommending this particular model as it has a specific feature that is helpful for a sound card data acquisition setup. Background: a few months ago I was looking for a "disposable" laptop to keep in my backpack at work and when going places. I wanted one that was small bu...
by stamasd
02 Jul 2019, 12:41
Forum: Detectors
Topic: Scintillation detector in vacuum bag
Replies: 4
Views: 160

Re: Scintillation detector in vacuum bag

True. I like the convenoence though. Plug them in before bedtime, they're ready to go back in the box the next morning. Been using them for years. Best deal I got was 3 for $35.
by stamasd
01 Jul 2019, 23:58
Forum: Detectors
Topic: Scintillation detector in vacuum bag
Replies: 4
Views: 160

Re: Scintillation detector in vacuum bag

I store my moisture-sensitive crystals and probes in a plastic airtight container together with a couple of these: https://www.eva-dry.com/product/e-333-renewable-dehumidifier/ They use silicagel beads but they're rechargeable, once the beads have absorbed moisture and change color they can be plugg...
by stamasd
30 Jun 2019, 03:00
Forum: Detector drivers
Topic: experiment using the Teensy 3.6 as a MCA
Replies: 5
Views: 230

Re: experiment using the Teensy 3.6 as a MCA

Do you mind if I steal some of the above? I'll try to make something similar with an ESp32 board for SiPM data acquisition. I'll probably use opamps with higher speed than the venerable TL072. Thinking OPA354 or 356, inspired by http://physicsopenlab.org/2017/11/28/fr ... -for-sipm/
by stamasd
28 Jun 2019, 01:57
Forum: Detector drivers
Topic: experiment using the Teensy 3.6 as a MCA
Replies: 5
Views: 230

Re: experiment using the Teensy 3.6 as a MCA

This is very interesting. I've been playing recently with some STM32F103-based boards and ESP32 boards. I wonder if those would be usable too - especially the latter. The main difference as far as signal acquisition is the ADC which is 12-bit instead of 16. I see you use 10 bits only for the convers...