ARS Helitran Series Open-Cycle Cryogenic Cooling System
| Brand | ARS |
|---|---|
| Origin | USA |
| Manufacturer Type | Authorized Distributor |
| Origin Category | Imported |
| Model | Helitran Series |
| Pricing | Available Upon Request |
| Temperature Range | 2 K – 350 K (with He-4) or 77 K – 350 K (with LN₂) |
| Cooling Method | Open-cycle helium or liquid nitrogen cryogen flow |
| Control System | Integrated temperature sensor and resistive heater subsystem |
| Vacuum Enclosure | Included with radiation shield |
| Sample Mounting | Modular sample stage options available |
Overview
The ARS Helitran Series Open-Cycle Cryogenic Cooling System is an engineered solution for precise, stable, and controllable low-temperature operation in spectroscopic, optical, and condensed-matter physics experiments. Unlike closed-cycle refrigerators, the Helitran system employs a continuous flow of cryogenic gas—either liquefied nitrogen (LN₂) or purified helium (He-4)—delivered via high-purity stainless-steel transfer lines to a cold head mounted inside a vacuum-insulated chamber. This open-cycle architecture eliminates vibration from compressors and avoids thermal hysteresis associated with mechanical cryocoolers, making it especially suitable for high-resolution Raman, FTIR, photoluminescence (PL), and magneto-optical spectroscopy applications where mechanical stability and thermal uniformity are critical. The system achieves base temperatures as low as 2 K when operated with helium gas and maintains exceptional temperature stability (< ±10 mK over 1 hour at setpoint) across its full operational range of 2 K to 350 K.
Key Features
- Modular open-cycle design compatible with both liquid nitrogen (77 K minimum) and gaseous helium (2 K minimum) cooling media
- Integrated platinum resistance thermometer (PRT) and calibrated resistive heating element for closed-loop temperature control
- Vacuum-tight chamber with multi-layer radiation shielding to minimize parasitic heat load and ensure thermal isolation
- Interchangeable sample stages—including horizontal and vertical optical access configurations, magnetic field-compatible platforms, and electrical feedthrough options
- Digital temperature controller with programmable ramp rates, hold functions, and real-time logging via RS-232/USB interface
- Compliance-ready architecture supporting integration into ISO/IEC 17025-accredited laboratories and GLP environments
Sample Compatibility & Compliance
The Helitran system accommodates a wide variety of sample geometries and experimental configurations, including thin-film substrates, single crystals, quantum dot ensembles, superconducting devices, and optoelectronic components. Its vacuum chamber provides ≥10⁻⁶ Torr base pressure (with optional turbomolecular pump), enabling surface-sensitive measurements free from atmospheric contamination. All electrical and optical feedthroughs meet IEC 61000-4 electromagnetic compatibility standards. The system’s temperature calibration traceability follows NIST guidelines, and its control firmware supports audit trails required under FDA 21 CFR Part 11 for regulated analytical workflows involving variable-temperature spectroscopic validation.
Software & Data Management
The included ARS TC-200 temperature controller features embedded firmware compliant with SCPI command syntax, enabling seamless integration into LabVIEW, Python (PyVISA), or MATLAB-based automation frameworks. Real-time temperature data is streamed at up to 10 Hz with timestamped CSV export capability. The controller logs all setpoints, actual readings, heater power output, and alarm events with user-defined retention policies. Optional software modules support automated temperature sweeps synchronized with external spectrometers or lock-in amplifiers, including trigger-based acquisition start/stop and metadata embedding per spectrum file (e.g., .spc or .jdx formats).
Applications
- Variable-temperature Raman and photoluminescence spectroscopy of 2D materials (e.g., MoS₂, WSe₂) and perovskites
- Far-infrared and THz spectroscopy requiring sub-10 K stability for phonon mode resolution
- Optical Hall effect and magneto-transport studies under simultaneous cryogenic and magnetic fields
- Calibration of IR detectors and bolometers across extended thermal ranges
- In situ characterization of catalytic surfaces and battery electrode interfaces using operando FTIR
- Support for ASTM E1423 (Standard Guide for Low-Temperature Testing of Materials) and ISO 22088-3 (Plastics — Determination of Thermal Conductivity at Low Temperatures)
FAQ
What cryogens are compatible with the Helitran system?
The system operates with either liquid nitrogen (LN₂) for 77–350 K operation or high-purity helium gas (≥99.999%) for extended range down to 2 K. Helium requires a dedicated gas supply with regulated pressure (10–15 bar) and dewar-level precooling.
Can the Helitran be integrated with commercial FTIR or Raman spectrometers?
Yes—standard optical ports (CF-63 or CF-100 flanges), electrical feedthroughs (up to 24-channel), and mounting interfaces are available for direct coupling to Thermo Fisher, Bruker, Horiba, and Renishaw platforms.
Is vacuum pumping equipment included?
A primary rotary vane pump is standard; optional turbomolecular pump packages (with cold trap) are available for ultra-high vacuum configurations.
Does the system support remote monitoring and control?
All controllers feature Ethernet and USB connectivity with open API documentation, enabling integration into centralized lab infrastructure and LIMS environments.
What maintenance is required for long-term reliability?
Annual verification of PRT calibration and helium line integrity is recommended; no scheduled compressor servicing is needed due to the open-cycle architecture.
