Xcalibur II manual

MAINTENANCE INSTRUCTIONS

5. Adjust the x and y tilt screws and type card raw on 0.5. Repeat point 5 until an image results where the maximum intensity resides on the right hand spot. This is typically 5.5 turns of each of the x and y tilt screws from point 1 above (screws are 1/4 mm pitch, 20 turns range).

6. Position the mouse cursor over the right hand spot. Right mouse click and select integration

at pixel position. Record the intensity figure from the history window.

7. Fine adjust x tilt screw [i.e. screw 5(1) in Figure 9.10.1]. Type card raw on 0.5. Repeat points

6 – 7 until a maximum intensity figure results.

8. Fine adjust y tilt screw [i.e. screw 5(2) in Figure 9.10.1]. Type card raw on 0.5. Record intensity of the right hand spot as in point 6 above. Repeat point 8 until a maximum intensity figure results.

9. The optics are now aligned.

9.10.3 Collimator Alignment of Enhance Ultra

1. Remount the collimator by pushing on and tighten the grub screws 2 (see Figure 9.10.1). Note the collimator has a specific orientation.

2. We now need to align the collimator. Dismount the 0.6 mm collimator cap by sliding it off.

4. Adjust the collimator x and y adjustment screws 7 and 8 (see Figure 9.10.1). Repeat 3 -4 until the X-ray beam is visible as a single intense circular spot.

5. Mount the 1mm collimator cap.

7. Fine adjust the collimator x and y adjustment screws 7 and 8 (see Figure 9.10.1). Repeat 6 -7 until the X-ray beam is visible as a single intense circular spot.

8. Finally, dismount the 1mm collimator cap and re-mount the 0.6 mm cap.

10. Adjust the collimator x and y adjustment screws 7 and 8. Repeat 9 - 10 until the X-ray beam is visible as a single intense circular spot.

11. The X-ray beam and focusing optics are now fully aligned. We now need to point the focused

X-ray beam through the centre of the diffractometer’s sphere of confusion. The sample position.

9.10.4 Aligning the beam to the centre of the goniometer –

Enhance Ultra

1. Set X-ray generator settings to 12 kV and 1mA

2. Flip beamstop to the “up” position (see Figure 9.10.2)

3. Mount the alignment disc with a 0.3 mm pinhole on a goniometer head and place on the goniometer.

4. Optically align the alignment disc at the centre of the goniometer, as with a crystal sample, using F12 etc.

5. Move the detector to 60 mm using km4 detector 60.

Version 1.4 Xcalibur_Manual_v1.4

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Xcalibur

USER MANUAL