18 kW Rotating Four-Circle Diffractometer
The 18 kW is used for:
    • X-ray diffraction
    • Reciprocal space mapping
    • X-ray reflectivity
    • Scan in 3-D, angular and reciprocal space
• Pole-figure scan
Schematic of the 18 kW setup.
Specifications:
-18KW Ultrex Rigaku Rotating Anode (donated by Abbott Labs in 2006)
    • Cu Anode:  Cu Ka1l= 1.5406 Å    Cu Ka2l=1.54443 Å
    • Point Source: Normal Focus 0.5mm x 10 mm,  18 KW max power
      • The effective source size should be 0.5-mm high by 1-mm-wide due to 6otake-off angle . But we measure the width to be 0.5 mm wide. (See Fig. )
    • Nominal operating power: 50 KV, 240 mA

- Huber slits for controlling horizontal and vertical divergence (See Fig.)

    • Nominal setting: hsdgap= 0.7 mm wide by 14-mm-high

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Graphite (002) Grade ZYA ( < 0.5omosaic) from Advanced Ceramics Corp.
    • Size: 25 x 25 x 2 mm
    • Para- focusing in the horizontal direction
    • Sagital-focusing in the vertical direction with  Rs = 225 mm
    • 2d002 = 6.708 Å, Cu Ka1 qB = 13.28o
    • 1 to 1 focusing, F1=F2=F= RS /sinq= 980 mm. This is the distance from the source to the mono and from the mono to the sample.

- Incident beam intensity monitor (NaI detector collecting scattered x-rays from Co coated Kapton foil)  I0 = 8900 cps at hsdgap=0.7mm and vsdgap=14 mm.

- Huber incident beam slits for passing Cu Ka1and blocking Cu Ka2

    • Nominal setting ka2cen=0,  ka2gap=0.5 mm-wide by 1-mm high

- Huber 4-circle diffractometer

    • Motorized Z-sample, zsamp=0 should put pin in COR (Center of Rotation)
    • Huber  1006 X-Y-c-fgoniometer
    • Sample holder
    • 2-theta arm:  (Nominal settings)
      •  guard slit ( gshhcen=.64, gshgap=1.1,  gsvcen=1.4, gsvgap=8 )
      • XIA filter box, ( T = 0.24 x 0.01 for STB straight thru beam)
      • detector slit, ( dshhcen=.05, dshgap=1.0,  dsvcen=1.9, dsvgap=12 )
      • Cyberstar NaI X-ray detector (0.3msec, 740V, Gain=8, LL=2.5, UL=6.5)

- Auxillary equipment:

    • Laser Level on Tripod
    • X-ray Eye
    • Goniometer pin
    • High-power zoom lens camera

The manuel of this machine can be downloaded here