Applications

Systems for Scanning Probe Microscopy

Janis provides the Cryostats to meet your Sub-Kelvin Scanning Probe Microscopy (SPM) needs.  We have standard designs available for SPM, including Scanning Tunneling Microscopy (STM) and Atomic Force Microscopy (AFM), plus the capability of custom building any system to your specifications.  No matter what your specific requirements, Janis can help.

Temperatures Range 0.009-1 K:  Dilution Refrigerators and Helium-3 Cryostats
Magnetic Fields:  Solenoid Magnets up to 17T, Vector Magnets up to 9-4T or 9-1-1T
UHV compatible:  <10^-10 Torr

Attributes:

1. Using Janis’ 50 years of experience to provide quiet, low vibration, low RF noise environments for atomic resolution. 
2. High B/T (10³ T/K)capabilities 
3. High degree of customization to meet your individual needs 
4. Use all welded and brazed construction 
5. All electopolished Stainless Steel, Gold Plated Copper, Silver Plated Aluminum 
6. Use of non-magnetic materials 
7. Fully Bakable Systems 
8. Fully Automatic Gas Handling Systems with color touch-screen and one-button cool-down 
9. Sophisticated Wiring to meet the needs of user’s
10. Low Helium Consumption

Existing designs include:

Scanning Probe Microscopy (SPM)

• Helium-3 cryostat with top-loading sample located in ultra high vacuum environment -
  HE-3-TLSUHV-SPM
• Helium-3 cryostat with standard loading sample located in ultra high vacuum environment - 
  HE-3-SSUHV-SPM/ESR

Atomic Force Microscopy (AFM) and Scanning Tunneling Microscopy (STM)

• Helium-3 cryostat with bottom-loading sample locatedin ultra high vacuum environment -
  HE-3-BLSUHV-STM
• Ultra high vacuum compatible Dilution refrigerator - JDR-500-STM
• Custom designs (see below)

Cryostats for Low Temperature System for Attomic Force Microscopy (AFM)/Scanning Tunneling Microscopy (STM)

Shown to the right is a special helium dewar supplied to Seoul National University in South Korea. This unit was to be integrated into a UHV surface analysis system which includes instruments such as an AFM/STM probe. Featuring a modular design, this cryostat required the full complement of Janis' design and manufacturing capabilities—all at a cost far below our competitors.

Scanning Tunneling Microscopy (STM) Superconducting Magnet System with Optical Access

An 8 T split superconducting magnet system has been designed and built for a Scanning Tunneling Microscope with optical access to the microscope cooling stage. The microscope is top loaded into a UHV space that can be baked out to a temperature of 150 degrees Celsius without affecting the superconducting magnet or the rest of the cryostat. The system offers variable temperatures from below superfluid helium temperatures up to room temperature. Several variations are available on this basic design, enclosing bottom optical access, cryostats for Scanning Near Field Optical Microscopes, Atomic Force Microscopes, etc.  Please visit our UHV Compatible Superconducting Magnets web page.

The Janis Difference

• Fifty Years of Leadership in Cryogenic Innovation and Quality
• World-Class Ultra-low Temperature (ULT) & Ultra-high Vacuum (UHV) Expertise
• Complete Design Support & Customization for Your Specific SPM Applications
• Used by Many of the World's Leading Advanced Materials Researchers & Labs

Contact Janis today for details of how our systems can be integrated into your laboratory.