Difference between revisions of "Specification for goniometer mount for radiators"
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| − | The Hall-D goniometer is a 6-axis device with 3 translational and 3 rotational degrees of freedom: | + | The planned Hall-D goniometer is a 6-axis device with 3 translational and 3 rotational degrees of freedom: |
Short description of the stages (from bottom to radiator mount): | Short description of the stages (from bottom to radiator mount): | ||
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* horizontal translational stage (target ladder), positioned in the center of the craddle and range of ≥ 8 cm (space for mounts of 5 diamonds and thin foil for normalization run). | * horizontal translational stage (target ladder), positioned in the center of the craddle and range of ≥ 8 cm (space for mounts of 5 diamonds and thin foil for normalization run). | ||
| + | The listed accuracy is based on the existing Huber goniometer in Hall B. | ||
* accuracy of translational motion: | * accuracy of translational motion: | ||
vertical: 200 μm | vertical: 200 μm | ||
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End switches required for all axes, additional home switches for rotations. | End switches required for all axes, additional home switches for rotations. | ||
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| + | The device is operated under vacuum (~10<sup>-6</sup>). | ||
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| + | [[Image:gonisketch2.jpg]] | ||
Latest revision as of 10:23, 23 October 2008
The planned Hall-D goniometer is a 6-axis device with 3 translational and 3 rotational degrees of freedom:
Short description of the stages (from bottom to radiator mount):
- horizontal translational stage (x-stage) to move the into/out-of beam (range ~20 cm)
- vertical translational stage (y-stage) to adjust the height of the radiator (range ~5 cm)
- rotation about the vertical axis (yaw) to ±15 deg.
- rotation about the horizontal, perpendicular to the beam direction (pitch) to ±15 deg.
- craddle: rotation about the beam direction (roll) to +120 deg. and -30 deg.
- horizontal translational stage (target ladder), positioned in the center of the craddle and range of ≥ 8 cm (space for mounts of 5 diamonds and thin foil for normalization run).
The listed accuracy is based on the existing Huber goniometer in Hall B.
- accuracy of translational motion:
vertical: 200 μm
horizontal (bottom axis): 200 μm
target ladder (fine tuning): 25 μm
- accuracy of rotational motion:
yaw (about vert.axis): 1.5 μrad
pitch (about horizontal, perp. to beam): 1.5 μrad
roll (about beam direction): 3.0 μrad
End switches required for all axes, additional home switches for rotations.
The device is operated under vacuum (~10-6).
