UHV (SPM) Bath Cryostat

The UHV (SPM) Bath Cryostat is an ultra-low loss helium bath cryostat with a nitrogen shield with two vapor cooled radiation shields added for increased performance. The system was initially conceptualized for STM, TEM, and AFM measurements, whereby ultra-low vibrations are required for atomic resolution. With its high performance and compact design, this system is a staple of the SPM community. As with all our systems, the UHV Bath Cryostats can be modified to best suit your indivi­dual needs.

Technical specifications

• Fully UHV / XHV compatible, can be baked up to 225°C
• SPM / STM / AFM compatible
• Temperature range: 2.2 K to 4.2 K
• Ultra-low cryogenic consumption LHe / LN₂: > 120 hours and > 250 hours hold time, respectively
• DN200 / 250 / 300CF base flanges for easy integration
• Compact design: 4 LHe / 15 LN₂ & 10 LHe / 21 LN₂ configurations
• Fully customizable cold plate, radiation shield, and design

Upgrades

• Additional geometries and tank volumes available
• Tubes for cabling through the LHe tank
• Linear push and / or pull mechanism at the tip /
  sample position
• Additional DN40CF or DN16CF flanges for customized wiring
• Low vibration LN₂ tank via an optimized
• Unique design
• Fully compatible UHV split pair superconducting magnet with ultra-low loss HTS / LTS current leads
• Radiation shields with integrated shutters, optical and sample transfer access
• Passive air damping system fully integrated into the helium system