Bruker-AXS D8 Discover Instrument Configurations

 

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 and
2) Contact the specialist to confirm that he will be available for the reconfiguration.

Reconfiguration takes 15 minutes or less.

 

Instrument Configurations

These represent the most common configurations at this time. Many other configurations are possible and can be arranged.

 

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