1 / 16

Laboratory Experiment 1

Laboratory Experiment 1. Vasily Arzhanov. Safety. Distance: keep yourself as far from radiation sources as possible Time: expose yourself to radiation as short time as possible Number: expose to radiation only minimal number of people. Experimental Setup. d = 6 ÷ 47 cm. d.

dyllis
Télécharger la présentation

Laboratory Experiment 1

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. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Laboratory Experiment 1 Vasily Arzhanov

  2. Safety • Distance: keep yourself as far from radiation sources as possible • Time: expose yourself to radiation as short time as possible • Number: expose to radiation only minimal number of people Lab 1

  3. Experimental Setup d = 6 ÷ 47 cm d • Naming convention • Same distances • Time scaling Cd Sphere Lab 1

  4. Detection Technique 97% α Channel 1: γ Detector γ PM Eu γ α 3% 6Li n Channel 2: t Eu γ Fiss. prod. Lab 1

  5. Multi-Channel Analyser Counts Channel n Channel n-1 Amplitude 0 … A1 An-1 An Amax Time Lab 1

  6. Lab 1

  7. Summary • Set/remove the Cd sphere • Set a distance • Acquire data • Save to a file • Set channels to sum up counts • Scale the counts to the reference time • Write down the result Lab 1

  8. One-Speed Diffusion Theory S0 r > 3λs Distance at which Diffusion theory is valid Isotropic source of thermal (slow) neutrons Lab 1

  9. Differential Measurement Lab 1

  10. Diffusion Length Thermal neutron absorbed Thermal (slow) neutron borne r Average over the neutron population Lab 1

  11. Migration Area (Length) Ordinary measurement Thermal neutron absorbed Fast neutron borne r Differential measurement rs rth Fast neutron thermalized Lab 1

  12. Orthogonality Property Fast neutron borne Thermal neutron absorbed θ θ θave = 90 θave = 0 Fast neutron thermalized Lab 1

  13. Calculation of Migration Lab 1

  14. Evaluating Integrals log r2A(r) Ordinary meas. Lab 1

  15. Relaxation Length No absorption r S0 Absorption Absorption Uncollided flux First collision Lab 1

  16. Summary Lab 1

More Related