slide1 n.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
Manchester Physics Spark Chamber PowerPoint Presentation
Download Presentation
Manchester Physics Spark Chamber

Loading in 2 Seconds...

play fullscreen
1 / 1

Manchester Physics Spark Chamber - PowerPoint PPT Presentation


  • 131 Views
  • Uploaded on

Light detector (Avalanche photodiode). Manchester Physics Spark Chamber. Neutrally charged Atom. Positively charged Ion. Electron. Electric Fields. Muon (µ ± ). Discriminator.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Manchester Physics Spark Chamber' - ivi


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
slide1

Light detector

(Avalanche photodiode)

Manchester Physics Spark Chamber

Neutrally charged Atom

Positively charged Ion

Electron

Electric Fields

Muon (µ±)

Discriminator

  • As the muon passes through the spark chamber it collides with the neutrally charged atoms and ionises them by knocking off electrons, leaving free electrons and positively charged ions.

High Voltage Switch

Neon/Helium gas mixture

Scintillator

Cosmic rays

Muon detectors

  • The high voltage on the plates in the spark chamber creates a strong electric field which accelerates the electrons and ions towards the plates. As the charged particles move towards the plate they collide with more neutrally charged atoms creating more charged particles. This continues in an avalanche process

Coincidence

High Voltage power supply (10kV)

Ground

(0 Volts)

Scintillator

  • When the number of electrons in the avalanche reaches 100 million, an electric field forms due to the charged ions and electrons. This causes the electrons and ions to recombine, in doing so they release photons which ionises more particles, causing further avalanches.

Muon (µ±)

Discriminator

Steel plates

Light detector

(Avalanche photodiode)

  • The light from the scintillator passes in to the wavelength shifting bars, which convert the blue light to red. The thin rectangular shape of the wavelength shifters concentrates the light at the end of the bars, making it easier to detect.
  • These scintillators are blocks of plastic containing fluorescent molecules. When a muon passes through the scintillator it gives off some of its energy which the scintillator converts in to blue light.
  • The different avalanches merge together until there is a continuous plasma between the high voltage plates. The plasma has a low electrical resistance which allows a spark to flow between the two plates.

How a spark chamber works

How sparks form