34ID-E Coordinate Systems
From 34-ID-E
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Beamline Coordinates
X-Y-Z
- X: radial direction of the ring, horizontal, pointing outboard to the doors.
- Y: vertically upward (against gravity).
- Z: along the x-ray beam
X-H-F
Because we routinely deal with motions in 45°-tilted directions, H and F are introduced as alternative coordinates to Y and Z:
- H: 45° upward-downstream (combination of +Y and +Z), this is the typical movement direction of the depth-profiling wire.
- F: 45° downward-downstream (combination of -Y and +Z), this is the "focus" direction of the sample under the optical microscope.
<math>H = \frac{1}{\sqrt{2}}(Y+Z)</math>
<math>F = \frac{1}{\sqrt{2}}(-Y+Z) </math>
Detector Coordinates
Figure A.
Figure B.
Figure A (left): A 3D cartoon showing detector image coordinates and the beamline XYZ coordinate system.
Figure B (right): 2D diagram showing relative positions and orientations of the images from the three detectors, arranged as if they are viewed from the sample, or from the bottom up.
