Resolution, intensity and background data

Energy dependence of monitor counts

  • Monochromator: PG (vertical focus)

  • Collimation : 40'-[Sapphire filter]- 40'- [Monitor]

Elastic scattering/Diffraction

Possible energies : Ei=13.7, 14.7 34.05 meV

Ei=14.7 meV

  • Monochromator: PG (vertical focus)

  • Analyzer : PG (vertical focus), FA=41.75 (adjusted V sample at 2th=14)

  • Sample : Al2O3 rod (20 mm in diameter, 40 mm in length)

Inelastic scattering

Ef=14.7 meV (fix)

  • Ef=14.643 meV (calibrated, exp #23)

  • Monochromator: PG (vertical focus)

  • Analyzer : PG (vertical focus), FA=41.75 (adjusted V sample at 2th=14)

  • Collimation : 40'-40'-40'-40'

  • Sample : Vanadium rod (20 mm in diameter, 40 mm in length) in Al can.

  • Sample env. : Standard GM, room temperature.

  • Energy resolution at the elastic condition: 0.825 +/- 0.013 meV (FWHM).

  • Background in inelastic conditions : ~0.1 cps.