UHV (STM) Magnet Cryostat

The UHV (STM) Magnet Cryostat is a low loss helium bath cryostat housing a UHV bore 1 / 2 / 3D superconducting magnet with an optional 1 K pot or JT stage. The system has a nitrogen shield and two optional vapor cooled radiation shields for added performance. The system allows for versatile conventional superconducting magnets to be used in UHV conditions.

Technical specifications

• Fully HV compatible, can be baked up to 80°C
• Houses a 1, 2 or 3D magnet, in solenoid or split pair configuration with up to 22 T in field
• Low loss vapor cooled current leads, compatible with retractable current leads or HTS / LTS current leads
• Base flanges, CF / COF to match your vacuum chamber
• SPM / STM / AFM compatible
• Includes a persistent switch for very stable magnetic fields
• Ultra-low cryogenic consumption LHe / LN₂
• 0.31 liters LHe / h and 0.28 liters LN₂ / hr (with retracted current leads, for a 9 T magnet)
• Fully customizable tank configuration
• Fully customizable cold plate

Upgrades

• Additional geometries and tanks volumes available
• Additional DN40CF or DN16CF flanges for customized wiring
• Linear push and / or pull mechanism at the tip /
  sample position
• Low vibration N₂ tank via an optimized unique design
• Passive air damping system fully integrated into the helium system
• Tubes for cabling through the LHe tank
• 1 K pot JT stage for even lower temperatures
• Radiation shields with integrated shutters, optical and sample transfer access