It's the weekend of the 20th June 2015, and we're spread over IdeaSquare at CERN. Some of us are in an electronics lab, running wires, testing chips, a few running Arduinos through their paces for IO tests, others simulating what a cosmic ray shower looks like on a group of detectors. And I'm writing blog posts like this. And coffee, all the coffee.
We're having ourselves a little sprint, a mini-hackathon, a focused push to make progress on some of the outstanding issues we have with the CosmicPi project. We started with those most glorious of things, a block diagram. For an idea, this where we're starting from:
More info on what these things all mean will come soon, I promise! Breaking it down further, we came up with some broad tasks for today:
Not too focused, but gives each of us some common goals for the day. Already we've made some progress!
What you can see here is part of the read out electronics for the cosmic ray detector. The black padded plates wrapped in tape are the scintillators (need to keep them dark so we don't get stray light in). The boards are the read outs, put on breadboard for testing (so we can change things quickly). In reality this'll be something the size of a book once we've ironed out the kinks. Does it work? Well...
Yes! This is a signal, for a cosmic ray, coming from the scintillator! The purple and green lines are the signal from the sensors directly (about 50ns long, really short!), the blue one after it's been through the electronics (about 5µs, readable by cheap electronics). We can see cosmics! Now to digitise it, put in into a computer, and do something with it!