Products
LHe/LN2 Cooled Probe Stations - Other LHe Cooled Systems
Overview
Cryogenic systems include a special model ST-100 continuous flow, variable temperature cryostat system with internal phase separator and multi-helical heat exchanger to ensure full use of the enthalpy of the transferred helium.
Standard Configuration
Cryogenic systems include a special model ST-100 continuous flow, variable temperature cryostat system with internal phase separator and multi-helical heat exchanger to ensure full use of the enthalpy of the transferred helium. This offers a high stability ultra low vibration system, when combined with the high efficiency multi-layer super-insulated Janis ST-FHT helium (or nitrogen) transfer line. The line includes a flow control valve that is located at the bottom of the storage dewar for reduced heat load into the flowing cryogen. This permits full operation of the system with the storage dewar at a low pressure of ~1.1 bar, for instantaneous flow control with no circulating pump or other control loop required. The flexibility of the line allows easy bending through a 12" (30 cm) radius without affecting the flow or the efficiency of the transfer. This is typically supplied with an automatic temperature controller (stability of 0.05 K) with IEEE-488 interface & LabView drivers for operation in the temperature range of ~5 K to 325 K (475 K optional). The standard system includes a gold plated OFHC copper sample mount, which accommodates a 25 mm x 25 mm sample. Larger sample sizes (up to 4" or more) are also offered with an added radiation shield window, to intercept the larger radiational heat load on the sample. The cryostat can also be added as an upgrade to vacuum room temperature probe systems.
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Specifications
ST-100 Probe Station
| Operating Temperature | LHe: 5 K - 475 K
LN2: 80 K - 475 K
(700 K optional) |
| Sample Size | 25 - 50 mm diameter
(100 mm optional) |
| Vibration Level | <1 micron |
| Probe Coverage | 14 - 50 mm diameter
(100 mm optional) |
Other Configurations
Cryogenic Two Probe Station with Stereo Microscope
Model ST-100-UHT-5TXKEL-1FO-1 Ultra High Temperature Probe Station
Model ST-4LF-2MW-2-CX Probe Station
Model HE-4-SLP Side Loading Cryogenic Probe System
The model HE-4-SLP side loading cryogenic probe system combines a Janis 12.5CNDT helium dewar with a cryogenic manipulated probe system.
The main features include:
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Four low frequency (1 GHz) or microwave probes to operate up to 40 GHz.
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A pumped continuously filled He-4 pot to provide longer hold times at lower base temperatures.
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A demountable side loading sample holder for sample exchange without warming the cryostat.
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Optical windows for the experiment and for sample observation
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Blank ports and thermal anchor stages for adding fiber optical cables or other feeds.
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Demountable bottom plate with blank port for optical microscope access to the sample.
Options:
HE-4-SLP Performance Specifications:
| Sample Mount Base Temperature: | Less than 3 K |
| Holding Time at Base Temperature: | 8 hours minimum |
| Operation Temperature Range: | 3.0 K - 300 K |
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