Cosmic Ray

[lodovico]

Hi to everybody,
for those who are interested I mark three posts that I put on the blog physicsopenlab :

http://physicsopenlab.org/2016/01/02/co ... incidence/
http://physicsopenlab.org/2016/01/04/sc ... -detector/
http://physicsopenlab.org/2016/01/10/co ... ons-decay/

They deals with a cosmic ray detector based on a coincidence detector and with another detector based on a plastic scintillator.
I have been inspired by one post of Pieter "pietkuip" on cosmic radiation.

Lodovico

[iRad]

Hi Lodovico - Nice work, and a very nice BC412 plastic scintillator you got there! :)
Cheers, Tom

[lodovico]

Yes,
indeed you did a really good job with the crystal and the PMT !
It works really well !
Thank you
Lodovico

[Sesselmann]

I recently visited the physics lab at the University of Sydney, where Marek Dolleiser showed me an interesting cosmic ray detector he made with three geiger tubes A, B and C. Each tube has a simple trigger circuit outputting a square wave pulse of fixed height so each tube has a specific pulse height.

PRA was used as a spectrum analyser to bin the counts from detectors A, B and C, but when A and B trigger together, the sum peak would appear and when A, B and C trigger together it produced a 5th peak.

This was a neat way to do coincidence counting without actually having a logic circuit.

Steven

[lodovico]

Right ! Smart way to use an MCA.
Lodovico

[pietkuip]

Nice Lodovico!

I am right now trying to detect the traces that muons make when they pass through the silicon of an image sensor. My sensor is small though (Raspberry Pi camera), so this takes some time.

[lodovico]

You mean directly with the camera or with something in front of it (a scintillator or something like that) ?
Lodovico

[pietkuip]

Directly in the sensor. I have the pi-camera covered with black electrical tape. It has been running for a few days now, and I do not see many events. I will start a new thread in a few days, hopefully with some interesting traces.

The pi-cam has a cmos sensor. Maybe it is better to use a ccd camera, I do not know much about this.

[Wojtek]

Hi, Lodovico!
Amazing piece of work. I ordered a similar detector from Tom for the same purpose. I will post when I put the detection system together and get some results.

[lodovico]

Well done,
if you need information let me know, on the site you can download a pdf with some other details.
Thank you
Lodovico