Bruker D8 Configurations

Bruker-AXS D8 Discover Instrument Configurations

Mostly the instrument is configured with GADDS at 20 cm. The following represents the other common configurations possible and can be arranged.

Rules for Reconfiguration
  • Facility specialist must reconfigure instrument unless user has been trained to do so.
  • Reservations made for 9:00 AM and 1:00 PM during the week will be reconfigured automatically according to selection made on the reservation calendar, provided the reservation is made before 8:00 AM.
  • If you require a reconfiguration for a reservation outside of these times, then:
        1) Make the reservation on the calendar
        2) Contact the specialist to confirm that he will be available for the reconfiguration.
  • Reconfiguration takes 15 minutes or less.

GADDS - 15 cm

Area detector at medium distance from sample. This allows full range movement of sample cradle with angular coverage of about 35 degrees.

X-Ray tube position GADDS1 position
Incident beam optics Göbel Mirror + 1.2mm MES + 0.5mm PS + 0.5mm Snout
Sample holder Vacuum chuck, spring-load, or capillary
Diffracted beam optics none
Detector GADDS area detector
Detector Position 15 cm
Variations none


GADDS - 10 cm

Area detector at close distance from sample. Sample cradle movement is limited, but angular coverage is about 50 degrees.

X-Ray tube position GADDS1 position
Incident beam optics Göbel Mirror + 1.2mm MES + 0.5mm PS + 0.5mm Snout
Sample holder Vacuum chuck, spring-load, or capillary
Diffracted beam optics none
Detector GADDS area detector
Detector Position 10 cm
Variations none


GADDS - Trans.

Area detector at closest distance from sample. Little or no sample cradle movement possible. Angular coverage is about 60 degrees. A beamstop allows data collection at low values of 2theta.

X-Ray tube position Red line
Incident beam optics Göbel Mirror + 1.2mm MES + 0.5mm PS + 0.5mm Snout + beamstop
Sample holder capillary or fiber holder
Diffracted beam optics none
Detector GADDS area detector
Detector Position 7.5 cm
Variations none


Point Detector XRR

X-Ray Reflectivity configuration. Point detector and auto-absorber allow large dynamic range.

X-Ray tube position Red line
Incident beam optics Göbel Mirror + small MES + Auto Absorber
Sample holder Vacuum Chuck
Diffracted beam optics Standard aperture slit assembly (SS, soller slit, DetS)
Detector Point detector with narrow opening slit holder
Detector Position Any
Variations knife edge
PS and snout added to reduce beam size


Point Detector II - beam

Parallel beam XRD (PB - XRD) configuration. Also used for Grazing Incidence XRD (GIXD).

X-Ray tube position Just short of 3rd positioning pin
Incident beam optics Göbel Mirror + 0.8 or 1mm MES
Sample holder Vacuum Chuck
Diffracted beam optics 0.35 degree PPC
Detector Detector Point detector with wide opening holder
Detector Position 250 mm
Variations 0.12 degree PPC
PS and snout added to reduce beam size