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Sorry, Nick, I can’t do simple arithmetic!
I typically detect muons at a rate of ~0.058 per sec = 3.5 per min, i.e. at intervals of ~17.5 sec, on average. The plastic scintillator is 25 x 25 x 100 mm.Hello,
What a nice little high-voltage supply you have built for your GM tube! A few years ago I built a little muon detector to the MIT design (which seems to have morphed into the Cosmic Watch detector). It uses a silicon photomultiplier and a scintillator block and is controlled by an Arduino Nano. I have attached a picture, just to show off. I always get counts of around 17.5 per minute, a bit less than you do, and not much variation during the day.
Attachments:
I did something similar (if cruder) in February to find out where my polar axis was pointing.
I took a sequence of images of the NCP region using a (shutterless!) Audine camera with a 135mm lens at f/3.5. The image shows the sum of 10 images taken 20 deg apart in RA.
The brightest stars in the field are Polaris ( dec = +89d 15m 50.56s ) and Lambda UMi ( +89d 02m 15.66s ).
Comparing with CdC, the centre of the circle is at about 15h 05m, +89d 53m 46s ( approx 6 arcmin E of NCP at the time).
My list of inspiring astronomy books has something in common with Denis Buczyinski’s.
Also, like Graham Winstanley, I spent far too long in the Picton & Brown Libraries in Liverpool browsing the astronomy and science section!The Starry Heavens Ellison Hawks 1950
Suns, Myths and Men Patrick Moore 1954
The Boy’s Book of Astronomy Patrick Moore 1959
The Amateur Astronomer Patrick Moore 1959
Norton’s Star Atlas Norton & Inglis 1959
Larousse Encyclopedia of Astronomy L Rudeaux & G de Vaulcouleurs 1962
Making & Using a Telescope H P Wilkins & Patrick Moore 1956
The Sun and the Amateur Astronomer W M Baxter 1963
Radio Astronomy for Amateurs Frank Hyde 1963
Survey of the Moon Patrick Moore 1963
etc, etc…Robert
