11/13/2016 at 05:11 •
Here is the first simple proof of concept idea using Geiger–Müller Tubes (GMT) and coincidence detection using logic gates which worked first time.
Simulation of how I imagined this circuit might work.
Actual first strip board prototype
First live test of prototype
11/13/2016 at 05:23 •
his detector design is an experiment in using a summing amplifier for measuring coincidence between multiple ionizing radiation detectors. In this example four Geiger–Müller tubes. The output would be used to drive different colours and sounds based on the voltage level of each pulse. It would also display background radiation as a specific colour/sound which would be ~1/4V pulse. Where a muon strike (cosmic ray) being either ~1/2V ~3/4V and ~1V.
Note the pulse height clearly increasing when the tubes are oriented from vertical to horizontal. This is a result of an ionizing particle traversing through more than one GMT originating from the sky.
01/26/2017 at 01:52 •
Highly simplified GMT detector
01/28/2017 at 23:46 •
04/08/2017 at 22:51 •
To get the price of each cosmic ray detector in the array down, I am currently developing a solid state detector using a matrix of low cost BPW34F SiPin Photodiodes, without the use of a scintillation panel. I have already used these diodes in other experiments and although on there own there are many limitations in it maybe possible to overcome them in a larger matrix.
The aim of this design will be to use layers of individually amplified photodiodes in a matrix where each matrix element is strongly pulse shaped. Coincidence detection is then measured between layers to identify relative location of where a Muon has passed through to produce each a colour and musical note output. This is a similar, but not identical method to the on used in my Cosmic Ray Hodoscope detector using GM tubes, but on a much smaller scale:
04/25/2017 at 05:22 •
The aim of this project is to deploy 20 individual cosmic ray detectors across a park or other landscape, for the Splash Adelaide 2017 Winter Festival in collaboration with a group of artist-musicians called Sacred Resonance.
When the public come to visit this installation, they will experience how cosmic rays are all around us and arrive in showers of particles. Each detector will seem to randomly twinkle with colours and sounds that are triggered by cosmic rays, not unlike walking through a field of colourful wind chimes.
However, as cosmic rays arrive in showers of particles, some of these detectors will trigger in unison and others randomly. A similar experience to what can be witnessed in nature like the sounds of Cicadas or the flashing light of Fireflies, where both sound and light fade in and out from randomness into unison.
Cosmic Rays have been present throughout the entire evolutionary history of life on our planet and so this display reinforces our connection with the universe and the importance of science and understanding the natural world.
However, the project has no agenda other than the first of what I hope are thought-provoking art/science installations. Which will provide an interesting window into the universe and the natural world around us, leaving the observer to form their own connections and conclusions.
Each detector in the array will produce a bright flash of one of 4 colours (red, green, blue or white). In the same manner, one of 3 musical notes ( e.g. C, F, G) or all 3 notes together depending on the direction and angle of an ionising particle called a muon passes through two or more Geiger–Müller tubes simultaneously.
The detectors aesthetics, however, have yet to be finalised it may either be enclosed in a type of bollard lamp post, something that hangs on a tree or pole or put directly into the ground like a paving block.
Overview block diagram
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