Virtual experiments for teaching and training

1
Virtual experiments for teaching and training

• Kim Lefmann
• MCNSI, ILL, 26/5-05

2
New university neutron course

• University of Copenhagen, 4th year physics
• 10 hours per week, 8 weeks
• Lecturers Kim Lefmann, Peter Willendrup, Bente
  Lebech, Kell Mortensen
• 4 reports, no exam
• Theory (Squires) and simple calculation problems
• Data analysis (Fullprof, Mfit, SANS)
• Instrument simulations (DMC, RITA-2, SANS-2)
• Plus 6 full days experiments at PSI (same
  instruments)

3
Course plan

• 1 Intro (neutrons McStas), materials, Squires
  ch. 1
• 2-3 Scattering theory, (powder) diffraction,
  FULLPROF, DMC Project (crystal structure),
  Squires ch. 2-3 (elastic)
• 4-5 Inelastic scattering, phonons, MFIT, RITA-2
  project (phonons), Squires ch. 2-3 (inelastic)
• 6-7 SANS, SANS-software, SANS-2 project, Notes
• 8 Magnetic scattering, Squires ch. 7-8
• 9 PSI experiments, comparing with simulations

4
Project 1, DMC

• PSI cold source
• Straight guide
• Flat monochromator
• Collimator
• Powder sample
• Banana detector
• ( diagnostic monitors)
• Data analysis

5
Project 2, RITA-2

• PSI cold source
• Straight guide
• Curved monochromator
• Collimator
• Vanadium / phonon sample
• Single analyzer blade
• Single detector
• ( diagnostic monitors)
• Data analysis in MFIT

6
Project 3, SANS-2

• PSI cold source
• Straight guide
• Velocity selector
• Pinhole collimation
• SANS sample
• program own sample
• PSD detector
• ( diagnostic monitors)
• Data analysis in SANS software

7
Conclusion

• Students seem to like the approach
• Good hands-on experience to instrumentation
• Good test of the user interface!
• Helps us focus to get virtual experiments tested!