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 |