1. References

  • the mtrans = 0 and mono = 0 position should correspond to a crystal gap of 10.02 mm
  • monochromator’s axis of rotation is positioned at 17.1 mm with respect to the incident beam

2. Hard Limits:

  • the mtrans motor hard high limit switch position corresponding to fully opened crystal gap of 31.14 mm is 31.97.
  • the mtrans motor hard low limit switch position corresponding to a minimum gap of 2 mm is –11.83 mm.

Motors:

  • mono : rotation angle of monochromator in degrees (0 < q < 50 deg)
    Energy range : 4 – 60 keV with Si(111)
  • mtrans : drives the crystal gap; the mtrans axis is at 44.61 deg to the horizontal plane at mono=0
  • mtilt2: rocking angle of the 2nd crystal in arcsec ( 1 step := 1 arcsec) minimum step =0.04584 arcsec ;range= ±60mm/0.045m =±1140 mrad
    i.e limits :0 - 458.4 arcsec
  • mtilt1 : horizontal alignment angle of the 2nd crystal in steps :
    (1 step := 1 arcsec)
  • minimum step =0.08251 arcsec ;range= ±60mm/0.025m =±2400 mrad
    i.e limits :0 - 825.1 arcsec