Angle-resolved spectroscopy
Rotate a sample through orientation series without warming the cryostat.
Opto-Mechanics · Cryogenic Piezo Stages - Rotators
Rotator25
General-purpose cryogenic rotary stage; 25 x 25 x 14.5 mm body; 360 deg endless rotation; 250 g payload; 4 microdeg fine-step resolution.
Datasheet (PDF) ↗CAD Model (STEP) ↗Catalog context
Where Rotator25 fits
Rotator25 is listed in the Cryogenic Piezo Stages - Rotators family. The local catalog record provides these first selection fields: Active axes: Rz; Mass: 28 g; Aperture: 6 mm.
Specifications
| Active axes | Rz |
|---|---|
| Mass | 28 g |
| Aperture | 6 mm |
| Work environment | Default:1.4 K~ 400 K, 1e-7 mbar, 35 Tesla |
| Mainbody | Default: Pure Ti, ULT: BeCu |
| Wires | Phosphor Bronze Twisted Paired Wires, 20cm |
| Pin materials | Polyster (glass fiber filled), BeCu |
| Pins number | Drive -2 pins, Sensor- 3 pins |
| Footprint × hight | 30 x 23 x 14.5 mm |
| Travel Range | 360° endless |
| Max. Load | 250 g |
| Dynamic Torque | 1.5 N.cm |
| Max. Velocity @300 K | 3°/s |
| Sensor | Resistive Sensor |
| Sensor range | 320° |
| Sensor resolution | 10 m° |
| Fine Tune Resolution @2 K* | 4 u° |
| Step Size (min) @300 K* | 0.4 m° |
Application context
Why this design is used
Polarisation studies at low temperature
Sweep crystal axis relative to a fixed polarisation to separate anisotropic responses.
Field-angle dependence
Change sample orientation relative to an applied magnetic field inside the bore.
System integration
Integration and compatibility
Use these checks to connect Rotator25 to the surrounding optical, mechanical and control system. Every value shown is taken from this model's own specification record.
- Travel and resolution
- Travel Range: 360° endless · Sensor resolution: 10 m°
- Separate travel from resolution and both from repeatability. Repeatability is what an automated sequence actually depends on, and it is the figure most often absent from a headline specification.
- Load and mounting
- Max. Load: 250 g
- Check the load rating in the orientation you will use it — a vertical or cantilevered load is a moment, not a mass — and match the base to an M6 pattern on a 25 mm grid or a 1/4"-20 pattern on a 1 inch grid.
Technical FAQ
Integration questions for Rotator25
What travel and resolution does the Rotator25 provide?
Travel Range: 360° endless · Sensor resolution: 10 m°. Separate travel from resolution and both from repeatability. Repeatability is what an automated sequence actually depends on, and it is the figure most often absent from a headline specification.
What load can the Rotator25 carry, and how does it mount?
Max. Load: 250 g. Check the load rating in the orientation you will use it — a vertical or cantilevered load is a moment, not a mass — and match the base to an M6 pattern on a 25 mm grid or a 1/4"-20 pattern on a 1 inch grid.
Specifying this part
What this model has to survive, and what it needs around it
Endless coarse rotation, fine tuning in µ°
Continuous 360° coarse rotation with fine adjustment in the single-digit µ° range at 2 K, which is what angle-resolved spectroscopy and polarisation work inside a cryostat need. Optic variants carry a Ø6 mm clear aperture for transmission along the rotation axis.
Heat load at the cold plate
Stick-slip inertial drives dissipate energy per step and draw no holding current once stopped, so the steady-state load on the mixing chamber is the wiring loom rather than the motor. Anchor the loom at each temperature stage and thermalise the moving body with an FTC copper braid.
Non-magnetic construction
Titanium bodies (BeCu on the .ULT variants) and BeCu fasteners throughout, rated for operation to 35 T and down to 30 mK with the .ULT option, at 2 × 10⁻¹¹ mbar with .UHV. A single steel screw substituted at installation is enough to compromise a high-field assembly.
Full series comparison, controller pairing and mounting hardware on the cryogenic piezo stages overview, or work through the selection with the configurator.
Model selection
Nearby series comparison
Compare Rotator25 with the closest available models in the Cryogenic Piezo Stages - Rotators family.
| Selection parameter | Rotator25 (current) | Rotator16 | Rotator25-Optic |
|---|---|---|---|
| Travel / adjustment | 360° endless | 360° endless | 360° endless |
| Resolution / sensitivity | 10 m° | 10 m° | 10 m° |
| Load / optic size | 6 mm | — | 6 mm |
Related products
Rotator16
Compact cryogenic rotary stage; 16 mm profile; 360 deg endless rotation; 100 g payload; 5 microdeg fine-step resolution.
Rotator25-Optic
Cryogenic rotary optic stage; 30 x 23 x 14.5 mm body; 6 mm center aperture; 360 deg endless rotation; 250 g payload.
Rotator35
High-load cryogenic rotary stage; 35 x 35 x 16.5 mm body; 360 deg endless rotation; 500 g payload; 3 microdeg fine-step resolution.
Rotator35-Optic
High-load cryogenic rotary optic stage; 35 x 35 x 16.5 mm body; 6 mm center aperture; 360 deg endless rotation; 500 g payload.
