Cryostats
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 in bend radius
Standard configuration includes
- Optical vacuum shroud
- Optical radiation shield
- Four (4) quartz window sets
- Optical sample holder
- Temperature sensor
- Pressure relief valve
- Sample positioner with one (1) 10-pin and one (1) 8-pin electrical feedthrough
- 6 ft superinsulated cryogen transfer line
- Control heater
- System test
VT-200 INCLUDES:
- Detachable tail Dewar
- Electrical feedthrough port(s)
- Exchange gas manifold
- Safety pressure relief valve
- Temperature sensor
- System test
All SVT Models Include:
- Janis Research SuperVariTemp system
- Top-loading sample positioner
- One (1) 10-pin and two (2) 8-pin electrical feedthroughs
- Safety pressure relief valve
- System test
Standard System Features:
- Top sample loading and exchange at all temperatures
- Effortless sample rotation and translation about the vertical axis at all temperatures, with options for rotation about a horizontal axis
- Field-independent thermometry
- The Janis SuperVariTemp system, with provision for a temperature control thermometer at the heat exchanger
- Vapor cooled/superconducting high current magnet leads
- Superconducting magnets with persistent mode operation providing field stabilities of 20 ppm/h
- Carefully designed magnet support inside the helium reservoir, with optical access through the Dewar vacuum space (OptiMag and SuperOptiMag systems)
- Built-in superconducting liquid helium level sensors, providing continuous or timed level monitoring
- Readily accessible and interchangeable sample chambers
Standard Features:
- Pulse tube or GM cooler
- Cryocoolers with 1 W, 1.2 W, 1.5 W or 2 W cooling at 4.2 K available
- Compact tabletop size
- Adjustable working distance
- Multipin electrical feedthrough
- Control heater and thermometer
- Integrated gas handling system
- Dry scroll pump for gas circulation
VNF Series features:
- Quick refill capability with included funnel assembly
- High-quality bellows-sealed evacuation valve and a built-in cryopump for maintaining high vacuum
- Safety pressure relief valves protecting all independent spaces
- 1.25 in diameter sample tube with customer-specified optical access (standard system offers four quartz window pairs with f = 1.0 optical access to the sample space)
- Top-loading sample chamber for rapid sample exchange
- Variable cooling system that places the sample in flowing N2 vapor (ideal for low thermal conduction samples), providing excellent cooling power and temperature control
- Lightweight sample positioner/mount assembly, with multi-pin electrical feedthrough access to the window region, offering rotation and translation around the cryostat axis
- Two silicon diodes installed on the vaporizer (heat exchanger) and sample mount for controlling and monitoring the system temperature
VPF Series features:
- Fused quartz windows
- 4-way optical access (f = 1.0)
- Si diode thermometer and heater (thermocouple for VPF-800)
- Electrical feedthrough for thermometry
- Optical sample holder
- Refill assembly for continuous operation
- Complete system test