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Exploring Cosmic Rays: The Science Behind Cloud Chambers in Particle Detection

Discover the fascinating world of cosmic rays and how cloud chambers make these invisible particles visible. This project, conducted in Gjar, Slovakia, demonstrates the workings of a cloud chamber, which utilizes dry ice and alcohol vapor to create a supercooled environment. When charged particles from the universe cross through the chamber, they ionize the vapor, forming tiny droplets that reveal their paths. This engaging educational initiative showcases the intersection of science and hands-on experimentation, expanding our understanding of the universe's most elusive elements.

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Exploring Cosmic Rays: The Science Behind Cloud Chambers in Particle Detection

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Presentation Transcript

  1. Cloud Chamber COMENIUS PROJECT AT GJAR, SLOVAKIA JaroslavHofierka

  2. Background • Particles coming from the universe (cosmic rays) are crossing the earth all the time – they are harmless but invisible to us. • Cloud chambers are detectors to make the tracks of the particles visible.

  3. Our cloud chamber

  4. Key ingredients • Dry ice evaporating

  5. How it works (1) Asthe top ofthe box isatroomtemperature, thealcoholevaporatesfromthefelt and slowlysinksdown. Becausethereis so muchalcohol, thechamberwillbesaturatedwithalcoholvapour. Thedryicekeepsthebottomofthecloudchamberverycold – so thatthevapor, onceit has fallen, is in a so calledsupercooled state and willveryeasilycondenseintoliquidformifanythingdisturbsitsequilibrium.

  6. How it works (2) When a chargedcosmicparticlecrossesthechamber, theparticlewillionizethevapor: ittearsawaytheelectrons in someofthegasatomsalongitspath. Smalldropletsofalcoholformalongthepathoftheinitialparticlethroughthechamber. Thesedroplets are thetracksweseeappearing.

  7. Our cloud chamber Cosmic rays!!!

  8. Thank you for attention!

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