CRYOSTATION – CROSSOVER PREMIUM (XP) SERIES

Features

• Cooling Systems Components
  • Closed-cycle (cryogen-free) Gifford-McMahon (GM) 2-Stage cryocooler recirculates a fixed supply of helium gas to cool stages within the cold head
    • Minimal operating costs – avoid the high costs & uncertain supply of liquid helium
    • Hassle-free operation – save time & energy by eliminating the challenging logistics associated with open-cycle (flow) systems, such as constant monitoring of helium levels, swapping out tanks, and manual temperature monitoring and valve control
  • Variable speed helium compressor pumps helium gas in and out of the cryocooler
    • Minimal infrastructure requirements – single-phase 50/60 Hz, 200-240 VAC, air cooled, 1-3 kW
    • Low energy and noise – variable flow technology optimizes input power to avoid wasting energy and extend the service life of the cold head
    • High power mode facilitates faster cooldowns and can accommodate larger heat loads when necessary
• System Architecture
  • Sample chamber mounts directly to any optical table
    • Accessible – various experimental setups are easily implemented around the instrument while maintaining sample & optical access
    • Flexible – mount at 45° or parallel to hole pattern on Imperial or Metric table
  • System cart includes the cryocooler, gas handling components, vacuum pump, and system control electronics
    • Complete process automation – controls vacuum pump out, cooldown, temperature stabilization, helium re-circulation, warmup, and venting
    • Straightforward system monitoring – protect the system and sample with automated process monitoring and diagnostic support
    • Optimized for the most sensitive experiments – typical vibration inducing components of the cooling system are isolated with tuned dampers in a separate, free-standing cabinet, significantly reducing baseline sample vibrations without the need for complex external supports or dedicated tables
  • Proprietary sample exchange barrier provides thermal and vacuum separation of the cooling system and sample platform
    • Efficient cooling cycle – warmup and cooldown the sample platform independently from the rest of the system, enabling more rapid sample exchange cycles
    • High sample throughput – pre-test samples quickly with an overnight cycle time before committing to long and expensive cooldowns in mili-Kelvin (dilution refrigerator) systems
• System Control
  • Touchscreen user interface with control software
    • Fully automated & optimized temperature control – simply set the target temperature & press cooldown
    • Control additional parameters – automate secondary features such as sample chamber bakeout or dry nitrogen purge
    • Monitor system status – the user interface displays real-time system status, temperature, and temperature stability
    • Software logs system data for easy export later
  • Remote control and external scripting
    • Remote control – conveniently control the system from another computer via VNC technology
    • External scripting – RESTful API for scripted control supported by most modern languages (Python, MATLAB, LabVIEW, C# & more)
• Sample Environment
  • Sample space accessed by lifting off outer window (vacuum) housing assembly & radiation shield
    • Configurable experimental setup – various sample mounting schemes & positional control options are available, including fiber and RF probe assemblies for photonic probe station setups
    • Preinstalled electrical connections – user feedthroughs with terminals inside the sample space offer low frequency connections for DC measurements or additional thermometers
    • Expanded interfacing options – route RF, fiber, gas and additional DC connections into the sample space through available side panels
  • Optical access provided from all sides with multiple radial ports and a top window
    • Flexible integration options – accommodate various measurement geometries, such as transmission, side reflection, and overhead microscopy
    • Improved collection efficiency – high NA & low working distance options available
    • Optical substrates – easily swap out windows for various wavelengths and application requirements
• Performance
  • Crossover premium cooling technology optimizes thermal and mechanical stability without sacrificing temperature or cooling power
    • Consistently reach the lowest possible temperatures – a proprietary LHe generation and recirculation method delivers pumped (low pressure) LHe to the sample chamber platform for maximum cooling efficiency
    • Maintain precise temperature control – excellent thermal stability at base temperature is achieved via the combined impacts of 1) intentional thermal design with the use of proprietary materials, 2) LHe cooling of the sample chamber platform, and 3) a dual radiation shield design which greatly reduces radiative heat loads in the sample space
    • Setup sensitive measurements with low noise – a patented vibration damping architecture rigidly supports the sample while isolating cryocooler energy to achieve nanometer level vibrations
  • Cooling power maximized with careful thermal design and proprietary mass flow control
    • No cryogenic expertise required – heat exchangers pull thermal energy out of the sample chamber, so no cooling power is wasted, making it easier than ever to reach and maintain temperatures below 1.7K
    • Increased configuration flexibility & improved sample access – high cooling power compensates for experimental heat loads (wiring, laser input, optical windows, etc.) which would typically impact base temperature