Spectroscopy Applications High Tran Cooling System
The High-Tran is a variable temperature, liquid transfer cryostat
which may be operated with liquid helium (4.2K to 450K)* or liquid
nitrogen (77K to 450K). This system is designed to cool spectroscopy
samples, Electro-Optic devices, cold shields, high energy physics
experiments, etc. Conveniences are offered to the researcher through
the use of this highly efficient, cost effective sample cooling system.(
System breakdown)It may be operated in any orientation and requires no
precooling. Initial cool down takes less than 30 minutes with secondary
cool down in approximately 7 minutes. A variety of temperature sensor
options and an integral tip heater circuit are available. Sample
temperature can be automatically controlled to ±0.1K (standard) or
±0.01K (optional). Manual temperature control can be achieved by controlling
the cryogen supply flow or by varying the exhaust gas back pressure. Additional
temperature sensors may be installed on the radiation shield station or for attachment
to the " sample under test."
The major advantage of the High-Tran over alternate methods of sample cooling is its
dual high efficiency internal heat exchangers which require only the necessary amount
of cryogen to cool your specific sample. The cryogen flow is controlled by an integral
needle valve in the detachable transfer line or by controlling the exhaust gas pressure
on the High-Tran exhaust port.
The High-Tran utilizes dual in-line internal heat exchangers separated by a proprietary
thermal balance to provide the rapid and efficient removal of heat at both the primary
cold station as well as the independent secondary or radiation shield station. Either
station may be separately or independently temperature controlled to meet the user's
specific needs. By placing optional heaters on the secondary cold station, applications
such as variable background IR detector characterization can be easily accomplished.
Optional Vacuum Interfaces include: O-ring Seals Ultra High Vacuum Flanges (various
sizes and custom designs available) Vacuum Weldments are Electron Beam Welded to
insure the ultimate in both UHV and Clean Sample Compatibility.
*Lower temperatures can be obtained.
Primary & Secondary (Radiation Shield)
Refrigeration Capacities
| Heat Load | Cold Tip | Shield |
|---|---|---|
| 2.5 watts | 4.2K | 12.9K |
| 4.2 watts | 10..0K | 16.2K |
| 5.0 watts | 20.0K | 22.0K |
| 7.0 watts | 30.0K | 22.0K |
| 15.0 watts | 70.0K | 31.9K |
| 16.9 watts | 77.0K | 34.0K |
Instrumentation Options
Temperature Sensors
- Silicon Diode
- Platinum Resistance Thermometer (PRT)
- Gallium Arsenide Diode
- ron-doped Gold Vs Chromel Thermocoupleron-doped Gold Vs Chromel Thermocouple
- Germanium Resistance Thermometer (GRT)
- Carbon Glass Resistor
- Hydrogen Vapor Pressure Gauge
Instrumentation Feedthroughs Electrical Access
- Up to 275 electrical Feedthroughs have been provided with the High-Tran system.
- Electrical access such as hermetically sealed coaxial, triaxial or multi-pin hermetic connectors can be conveniently interfaced to customer requirements.
Heater Circuits
- Cartridge
- Thin Film
- Special Resistive Network Thermometer
Standard System Products
When a complete High Tran Cooling system is ordered, the following components would also be delivered standard. (Reference Diagram)
- P/N 3040, High Tran
- P/N 2244-1, Rad Shield
- P/N 3092, Sample Mount
- P/N 2167-1, Vacuum Shroud
- P/N 3063, Transfer Line
- 331-S Temp Controller
- CF-50-PB-SS-LL-V Storage Dewar
- 8905 SWDD, Vacuum Pump*
*Not regularly stocked at RGH&A. We can order if necessary.