Low Temperature Effusion Cell
The Low Temperature Effusion Cell (LTEC) is used to deposit a wide range of materials with a high vapour pressure (e.g. Li, Mg, Bi…) for molecular beam epitaxy (MBE). The LTEC features a patented flat foil Tantalum filament that minimizes the temperature difference between the crucible and the filament. The filament design has many benefits:
- Better thermal load distribution
- Rigid design, deformation limited.
- No magnetic field due to the opposing coils compensating each other.
- The top connecting ring can be designed so that the crucible orifice may be hotter than the crucible body, improving beam quality.
Available crucible capacities are 6cc, 13cc, 20cc, 23cc, 40cc, 60cc, but bigger crucible sizes are essentially possible. Both conical and bottle neck crucible designs are available. The cell is technically identical to STEC except that the filament only surrounds the top section of the crucible.
Product Accessories
- Temperature control package
- TDK Lamba power supplies,
- K-type or C-type bakeable thermocouple cables
- Eurotherm PID controller
- Bakeable water-cooling lines
Specifications
Feature | LTEC |
Volume* | 6 – 60 cc |
Max. operating temperature | 1000 °C |
Max. outgassing temperature (max. 30 min) | 1100 °C |
Temperature stability | Better than ± 0.1°C |
Max. temperature ramp rate | Up to 100 °C/min |
Thermocouple | K- or C-type |
Cooling water flow** | > 0.5 l/min, max 30 °C |
Mounting flange*** | Customizable |
*Technically possible to get same sizes as with the STEC
**If equipped with water-cooling shroud.
***Depends on the cell volume and available chamber port.