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Virtual experiments in University teaching

Explore virtual experiments in University of Copenhagen's neutron course with Kim Lefmann, covering theory, data analysis, and practical projects. Gain insights through McStas simulations and real experiments at PSI, enhancing student understanding and engagement.

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Virtual experiments in University teaching

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  1. Virtual experiments in University teaching Kim Lefmann MCNSI public, ISIS, 27/9-05

  2. New University neutron course • University of Copenhagen, 4th year physics (+Ph.D.) • 10 hours per week, 8 weeks • Lecturers: Kim Lefmann, Peter Willendrup, Bente Lebech, Kell Mortensen • Theory (Squires) and simple calculation problems • Data analysis (Fullprof, Mfit) • 3 reports on McStas simulations (DMC, RITA-2, SANS-2) • Plus 3 (6) full days experiments at PSI • One final report, no exam

  3. Course plan (week by week) • 1: Introduction (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) • PSI cold source • Straight guide • Flat monochromator • Collimator • Powder sample • Banana detector • (+ diagnostic monitors) • Data analysis in FULLPROF

  5. Project 2: RITA-2 (PSI) • PSI cold source • Straight guide • Curved monochromator • Soller collimator • Vanadium / phonon sample • Single analyzer • Single detector • (+ diagnostic monitors) • Data analysis in MFIT

  6. Project 3: SANS-2 (PSI) • PSI cold source • Straight guide • Velocity selector • Pinhole collimation (3/6 m) • SANS sample • PSD detector • (+ diagnostic monitors) • Simple data analysis (Gunier, Perot) • (right) Virtual data.Hard spheres, 50 nm,

  7. Real experiments • PSI, 23-29 June 2005 • 2 groups of 3 M.Sc. students • SANS-2 under repair • RITA-2, 3 days each • No repetition of simulations! • Spin wave projects (α-MnMoO4) • Data analysis in MFIT • Students very self confident even tough instrumentation (multi-analyzer mode)

  8. Conclusion • M.Sc. students like the approach (continue with neutrons) • Excellent student reports! • “hands-on” experience to instrumentation • Students act experienced on Day-1 • Better understanding for semi-experienced Ph.D. students • Good beta-test of McStas 1.9! • Focused efforts to get virtual experiment concepts tested • This will be continued!

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