SuperTran Continuous Flow Cryostats

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 (LN,), these systems provide fast (15 minutes or less to 4.2 K with LHe) cooldown, a 1.4-325 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 bifilarly wound 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. Temperatures as low as 1.4 K can typically be maintained for approximately seven minutes without external heat load by pumping on the LHe inventory of the cold finger. Optional high power heaters provide sample temperatures to 700 K on special order.

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.

Illustration of Typical Optical SuperTran Cryostat by Janis Research

Special Features and Benefits

No vacuum pump required for temperatures over 4.2 K
No heating of exhaust gas required
Monitoring of flow rate not required
Easily adaptable to a He recovery system
Highly flexible transfer line with a minimum 12" bend radius

Table of Contents		Page
Introduction		1, 2
ST-100 Cryostat Systems		3, 4
ST-100-FTIR Cryostat Systems		5
ST-170 ESR Systems		6
ST-200 Tubular Systems		7
ST-200-NMR Tubular Systems		8
ST-300/300T Compact Systems		9, 10
ST-300-MS Compact Systems for Microscopy		11, 12
ST-400 Ultra High Vacuum Systems		13
ST-500 Microscopy Cryostat		14, 15
ST-500-LN Microscopy Cryostat		16, 17
Basic System Specifications		18
Options & Accessories		19

JANIS RESEARCH COMPANY, INC.
2 Jewel Drive, P.O. Box 696
Wilmington, MA 01887-0696 USA
TEL: +1-978-657-8750 FAX: +1-978-658-0349
E-Mail: sales@janis.com
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