LN2 Cryostat

PRODUCT OVERVIEW

Liquid Nitrogen Cryostat is a device used to maintain cold cryogenic temperature on any form of sample using liquid Nitrogen. The system features a continuous flow of cryogen which doesn’t require any electrical power and use some quantities of liquid nitrogen during operation. On specific application and configuration of the system, system offers a wide temperature range from 48 Kelvin up to 675 Kelvin within a single setup.

The selection of the system is mainly categories by the sample factor, temperature range and economical approach. System will allow sample to be in two main states which is in vacuum or vapor. Customer would prefer sample in vacuum as it offer lowest purchase and operating cost, simplest system design, faster cool down time and fewer windows in the optical path. While sample in vapour offer fastest sample exchange time and effectively cools low thermal conductivity samples.

KEY FEATURES

• Lower initial purchase price
• Inherently lower vibration
• Lower base temperatures
• Faster cooldown with most models
• Acoustically quiet
• Greater flexibility in design parameters
• No scheduled maintenance requirements

LIQUID HELIUM AND LIQUID NITROGEN

SuperTran Continuous Flow Cryostat Systems – Sample in Vacuum

With an extensive range of field-proven applications and a worldwide installation base, Janis Research SuperTrans represent the state-of-the-art in continuous flow cryostat design. Utilizing liquid helium (LHe) or liquid nitrogen (LN2), most of the systems provide fast (15 minutes or less to 4.2 K with LHe) cooldown, a <2 K -325 K total operating range and precise temperature control capability in an economical and easy-to-use package.

All systems consist of a cold finger, radiation shield, sample holder, lightweight aluminum vacuum shroud, electrical feedthrough ports and a high efficiency flexible six foot cryogen transfer line. SuperTrans can be operated in any orientation with only minor variations in efficiencies. Temperatures of the sample is varied by means of a heater attached to the cold finger. The sample mount and all standard Janis sample holders have provisions for thermometry which, in conjunction with an optional temperature controller, allow precise control over sample temperature.

Standard systems produce sample temperatures of 77-325 K (LN2) and 4.2-325 K (LHe). Continuous operation at temperatures below 4.2 K is readily achieved by reducing the pressure at the venting port of the system. For most of the systems,

A high efficiency superinsulated, vacuum- jacketed transfer line, equipped with evacuation and safety pressure relief valves, connects the cryostat head to a storage dewar. The 0.50 inch diameter storage dewar leg fits most commercially available storage dewars. All Janis Research systems are fully integrated and liquid helium tested at our Wilmington, Massachusetts facility prior to shipment.