Physike Ucryo-200 Integrated Continuous Sub-Kelvin Cryocooler
| Brand | Physike |
|---|---|
| Origin | Beijing, China |
| Manufacturer Type | Direct Manufacturer |
| Country of Origin | China |
| Model | Ucryo-200 |
| Pricing | Available Upon Request |
Overview
The Physike Ucryo-200 is an integrated, continuous-operation sub-kelvin cryogenic thermostat engineered for ultra-low-temperature physics experiments requiring stable, long-duration operation below 1 K. It employs a 4 K pulse-tube or Gifford-McMahon (GM) cryocooler as the primary cold source, coupled with a multi-stage helium gas precooling and condensation system. Helium-4 gas is continuously circulated through an external sealed gas loop — comprising high-efficiency heat exchangers, flow restrictors, and a dedicated vacuum pumping station — enabling sustained condensation into liquid He-4 within an internal cryostat chamber. This closed-cycle architecture eliminates the need for liquid cryogen refills while maintaining thermal stability at base temperatures below 860 mK under standard configuration. With optional upgrades—including vibration-isolated pulse-tube compressors, suspended cold-head mounting, and enhanced pumping capacity—the system achieves sub-800 mK base temperatures with RMS mechanical vibration amplitudes <100 nm, meeting stringent requirements for quantum-limited measurements.
Key Features
- Integrated 4 K cold head directly mounted inside the cryostat body, minimizing thermal conduction losses and simplifying system integration
- Continuous helium recirculation via externally mounted sealed gas loop and dedicated vacuum pump station
- Multi-stage heat exchange network optimized for efficient He-4 precooling, liquefaction, and phase separation
- High-performance thermal switch enabling rapid cooldown from 300 K to 4 K in under 90 minutes, followed by sub-Kelvin ramping within 4–6 hours
- Vibration mitigation options: compressor decoupling, cold-head suspension, and active damping mounts compliant with ultra-low-noise experimental environments
- Modular design supporting field-upgradable components including higher-capacity circulation pumps, low-resistance gas lines, and enhanced thermal anchoring interfaces
Sample Compatibility & Compliance
The Ucryo-200 accommodates diverse experimental payloads including SQUID magnetometers, transition-edge sensors (TES), superconducting qubit chips, neutron scattering sample stages, ARPES electron analyzers, and cryogenic detectors for astrophysics and high-energy physics. Its vacuum-tight stainless-steel construction and all-metal seals meet ISO 10110 optical surface cleanliness standards for cryogenic optics integration. The system complies with IEC 61000-6-2 (electromagnetic immunity) and IEC 61000-6-4 (emission) requirements. All control electronics support GLP/GMP audit trails when interfaced with validated data acquisition software; optional FDA 21 CFR Part 11-compliant firmware modules are available for regulated research environments.
Software & Data Management
The Ucryo-200 operates under Physike’s CryoControl v3.2 platform, a Linux-based real-time controller offering PID-regulated temperature stabilization across five independent thermal zones (4 K stage, still, He-4 pot, shield, and sample holder). Temperature logging resolution is 10 µK with 16-bit ADC accuracy and timestamped metadata (ISO 8601 format). Data export supports HDF5 and CSV formats, with native API bindings for Python, LabVIEW, and MATLAB. Remote monitoring and script-driven operation are enabled via TLS-secured Ethernet (TCP/IP) or optional fiber-optic link. System diagnostics include continuous helium pressure trending, compressor health monitoring, and automatic fault logging with event correlation across thermal, vacuum, and power subsystems.
Applications
- Quantum computing device characterization: DC/RF transport, microwave reflectometry, and coherence time mapping at millikelvin temperatures
- Ultra-sensitive magnetometry using SQUID arrays for materials science and biomedical applications
- Calorimetry and specific heat measurements on unconventional superconductors and quantum spin liquids
- Angle-resolved photoemission spectroscopy (ARPES) with cryogenic sample cooling and in-situ cleavage capability
- Neutron scattering instrumentation requiring sub-1 K sample environment stability over multi-day runs
- Astrophysical detector testing: transition-edge sensor (TES) array calibration and dark matter search prototype validation
FAQ
What is the minimum base temperature achievable with the standard Ucryo-200 configuration?
The standard Ucryo-200 achieves a base temperature of <860 mK under typical laboratory conditions (ambient ≤25 °C, relative humidity <60 %) with nominal helium circulation flow and standard pumping speed.
Can the Ucryo-200 be operated without external helium gas supply?
Yes — it operates as a fully closed-cycle system using only the initial helium charge sealed during factory commissioning; no external helium replenishment is required during normal operation.
Is remote operation and integration with third-party DAQ systems supported?
Yes — the CryoControl system provides RESTful API endpoints, SCPI command compatibility, and driver libraries for common scientific computing environments.
What vacuum level is maintained in the cold bore during sub-K operation?
The system maintains a dynamic vacuum better than 5×10⁻⁷ mbar in the cold region during continuous operation, verified by capacitance manometer and ion gauge cross-calibration.
Does the Ucryo-200 meet electromagnetic compatibility requirements for use near sensitive RF instrumentation?
Yes — all cryocooler drive electronics are housed in EMI-shielded enclosures and tested per IEC 61000-6-2/6-4; optional ferrite-filtered power inputs are available for ultra-low-noise installations.
