Variable Line Spacing Plane Grating Monochromator - VLSPGM
for BL-28 at KEK
Features | Specification | Design | Drawings | Photos | Control System | Delivery Record
Specifications
- Source
- Variable Polarisation Undulator
- Energy Range
- 30 to 300eV
- Plane Mirror
- 40mm(W) x 110mm(L) x 60mm(T)
- Water cooled
- ScanningAngle -0.5° to +10° with Resolution 0.002 arcsec/step
- Gratings
- G1(400L/mm VLSPG) /G2(800L/mm VLSPG) interchangeable
- 40mm(W) x 110mm(L) x 40mm(T)
- Water cooled
- Scanning Angle 0° to +12° with Resolution 0.002 arcsec/step
- Included Angle
- 162° to 176°
- Encoder
- RON905UHV with IK320 made by Heidenhain
- Size
- Chamber: Ø 760mm (Main flange = Ø850)
- Distance of optical axis flange: 1050mm
- Height(FL≈Height of beam): 1200mm
- Weight
- Approx 1 metric ton
Axis Specifications
Holder for a plane mirror
O Driving shaft
| Axis | Range for coarse adjustment | Resolution per revolution | Range for fine adjustment | Resolution per revolution | Drive Method |
|---|---|---|---|---|---|
| X | 40mm | 0.5mm | - | - | Manual by magnet coupling feedthrough screwdriver |
| Z | ±2 mm | 0.5 mm | - | - | Kinematical adjustment by fine screws |
| θx (Pitch) | ±20.9 mrad (±1.2°) | 2.1 mrad (0.12°) | - | - | Kinematical adjustment by fine screws |
| θy (Roll) | ±43.6 mrad (±2.5°) | 62.4 mrad (3.57°) | - | - | Kinematical adjustment by fine screws |
Two gratings can be mounted and interchangeable with each other
O Driving shaft
| Axis | Range for coarse adjustment | Resolution per revolution | Range for fine adjustment | Resolution per revolution | Drive Method |
|---|---|---|---|---|---|
| X | 130mm | 0.002mm | - | - | Stepping motor driven |
| Z | ±2 mm | 0.5 mm | ±0.3 mm | 0.083 mm | Kinematical adjustment by using differential micrometer screws |
| θx (Pitch) | ±17.5 mrad (±1°) | 3.2 mrad (0.185°) | ±5.2 mrad (±0.3°) | 0.32 mrad (0.018°) | Kinematical adjustment by using differential micrometer screws |
| θy (Roll) | ±43.6 mrad (±2.5°) | 10 mrad (0.57°) | ±8.72 mrad (±0.5°) | 1 mrad (0.057°) | Kinematical adjustment by using differential micrometer screws |