TSR series 1.5K three-stage ultra-low temperature cold head-1.5K three-stage ultra-low temperature cold head-LINKPHYSICS

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TSR series 1.5K three-stage ultra-low temperature cold head

1.5K three-stage GM ultra-low temperature cryocooler cold head is a high-performance closed-cycle cryogenic cooling core device evolved from the traditional two-stage GM refrigerator architecture. Through an innovative three-stage cascaded refrigeration design, it breaks through the lower temperature limit of conventional 4K-class two-stage cold heads. While retaining the advantages of traditional GM refrigerators—high stability, low maintenance, and helium-free closed-cycle operation—it significantly extends deep cryogenic performance, enabling a minimum achievable temperature of 1.5K. It is ideally suited for ultra-low temperature applications at and below 2K, providing stable refrigeration performance and effectively filling the performance gap of conventional commercial GM cold heads in the sub-2K temperature range.

TSR series 1.5K three-stage ultra-low temperature cold head Overview

It is ideally suited for ultra-low temperature applications at and below 2K, providing stable refrigeration performance and effectively filling the performance gap of conventional commercial GM cold heads in the sub-2K temperature range.

TSR series 1.5K three-stage ultra-low temperature cold head Technical Parameter

This series of three-stage GM ultra-low temperature cryocooler cold heads is a high-performance closed-cycle cryogenic cooling core system evolved from the traditional two-stage GM refrigerator architecture. Through an innovative three-stage cascaded refrigeration design, it overcomes the lower temperature limit of conventional 4K-class two-stage cold heads. While retaining the inherent advantages of GM cryocoolers—high stability, low maintenance, and helium-free closed-cycle operation—it significantly expands deep cryogenic performance capability.

The system can achieve a minimum base temperature of 1.5 K, making it ideally suited for stable refrigeration in ultra-low temperature applications at and below 2 K. It effectively fills the performance gap of conventional commercial GM cold heads in the sub-2 K temperature regime.

Core Product Advantages

· Breakthrough in deep cryogenic performance:
Three-stage cascaded refrigeration architecture breaks through the limitations of conventional 4 K cold heads, enabling stable operation down to 2 K and achieving a minimum temperature of 1.5 K. The system delivers industry-leading deep cryogenic performance.

· Dual-model configuration for precise application matching:
Two power-level variants are available to match both light-load and heavy-load sub-2 K cooling requirements, providing comprehensive application coverage and efficient model selection.

· High-efficiency operation with no refrigerant or gas consumption:
Helium-free closed-cycle self-refrigeration eliminates the need for cryogenic consumables. The system features stable operation, low vibration, high temperature control precision, and supports continuous 7×24 hour operation.

· Modular integrated design:
Compact and well-structured design enables easy integration with vacuum chambers, precision experimental platforms, and measurement systems, making it suitable for both scientific research and industrial applications.

System Composition

1. Three-stage cold head

GM refrigerator unit
Interface flange: gas inlet, gas outlet, and 24-pin LEMO vacuum electrical connector (for sensor and heater wiring)
Helium gas circuit and heat exchangers
Three-stage cold plate: 100 mm diameter, with uniformly distributed M3 threaded holes at 12.5 mm spacing