DetailHESTIA
HESTIA is a high performance microscopy sample stage developed for momentum microscopy and electron momentum spectroscopy. It features high precision and stabililty, combined with a real 6 axes positioning of the sample. The HESTIA stage can achieve temperatures lower than 9 K on the sample surface.
Momentum microscopes (KREIOS 150 MM and METIS) and electron momentum spectrometers (KREIOS 150) require a precise and stable sample stage for operation. The HESTIA sample stage is a real 6 axes sample stage for precise alignment of the lateral components x, y and z as well as both tilt directions and the azimuthal rotation.
A unique design of piezo actuators allows positioning of the sample in front of the microscopy lens. An additional independent azimuthal rotation allows for fine adjustment of the detected structure, e.g. for aligning a reciprocal high symmetry direction along the entrance slit of the analyzer.
The achievable sample temperature can be lower then 9 K while having a low helium consumption. A well designed cooling shield and tight thermal contact of the sample to the stage ensures highest cooling performance. The sample stage features an open cycle flow cryostat. An external closed cycle cryostat is available on request.
HESTIA can also be used in experiments besides microscopy approaches, where lowest temperatures and highest stabilities are requried.
SPECIFICATIONS
| Sample Temperature | < 9 K |
| Lateral Stability | < 20 nm |
| Lateral Reprodicibility | < 5 µm |
| Number of Axes | 6 |
| Axes Range | x,y and z = 6 mm Tilt= ± 2° Azimuthal Rotation ± 60° |
| Sample Cooling | Open Cycle Liquid Helium (Closed Cycle Available on Request) |
| Sample Heating | Counter Heating on Cryostate up to 300 K |
| Sample Holder | SH2/12 |
| Motorization | 6 Axes |
| Temperature Measurement | 2x Si Diode |
| Mounting Flange | DN150CF |
