What are types of cloud chamber?
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There are several major types of cloud chamber and related particle-track detectors. They all work by making charged particles visible as trails. 1. Diffusion cloud chamber This is the most…
Muon Detection
When a muon travels through our atmosphere, what is the chance that it will interact with something in the atmosphere?
A muon passing through the atmosphere is very likely to interact many times electromagnetically, but very unlikely to undergo a major nuclear interaction or be stopped outright. The key point…
Are muons charged?
Yes — muons are electrically charged particles. A muon is similar to an electron but much heavier (about 207 times the electron’s mass). There are two types: The elementary charge…
Calculating attenuation of muons in lead – ASCII text version
1. Basic physics Cosmic-ray muons at ground level: Approximate stopping power in lead: dE/dx ≈ 1.5 to 2 MeV g^-1 cm^2 Lead density: rho_Pb ≈ 11.34 g/cm^3 So energy loss…
How to calculate a table showing attenuation of muons by lead thickness, and analysing the results I have obtained at LRO with difference quantities of lead between two CosmicWatch muon detectors in coincidence arrangement 17/5/2026
The following has come from ChatGPT. (An ASCII text version of this post is available for people who have difficulty reading this page at https://www.astronomy.me.uk/calulat8ng-attenuation-of-muons-in-lead-ascii-text-version) Assessing the results from LRO…
LRO Experiment to test effect of placing various amounts of lead between two x UKRAA CosmicWatch Muon Detectors in coincidence mode 16-17 May 2026
This experiment was suggested to me at the last SARA online meeting. Here are the results – I started with zero and build up to 5, and to confirm went…
Radioactive test source experiment with CosmicWatch muon detector at LRO, showing change in rates measured as result of LRO small radioactive test source 5-6 May 2026
I have successfully replicated the experiment in the Comic Watch manual showing change in rates measured as result of radioactive test source (radioactive rock from ebay) on top of detectors…
Using radioactive test source on UKRAA Cosmicwatch muon detectors
Two detectors in coincidence mode, one on top of other. Radioactive rock test sources from ebay – large and small ones – plus I have some pieces of lead which…
Optical grease specifications and suggestions for cheap option to go between SiPM and scintillator in homemade muon detection
Untested advice from ChatGPT: The following comes from ChatGPT. I am unable to verify the content from personal experience. I have entered this advice onto this blog as part of…
Some observers trying to measure the speed of light using two separating Cosmic Watch muon detectors have come up with results faster than speed of light. Are these results possible?
Short answer: no—those experiments are not actually measuring anything travelling faster than light. When Cosmic Watch–style muon setups give “superluminal” results, it’s almost always due to measurement/systematic effects rather than…