LT3-OM Helium Flow Cryostat
With unique features not found in other cryostats, the LT3-OM is designed for Micro-Raman spectroscopy experiments, as well as other types of low-vibration spectroscopy and microscopy experiments. A slim 1.52" profile allows the Micro-Raman cryostat to fit on most microscope stages. Also it has a continuously adjustable sample holder, enabling the user to fine tune the placement of the sample within the working distance of their microscopy system.
The Micro-Raman cryostat’s vacuum shroud is constructed entirely of polished, welded stainless steel for a cleaner sample environment. The smooth durable stainless steel finish limits the residual vapor pressure (partial pressure) of water and oil, and reduces the probability of mono layers of water forming on the sample surface. This leads to no water peaks during the experiment.
The Micro-Raman cryostat benefits from all of the features that set the ARS manufactured LT3 cryostats apart from all other flow cryostats, including the coaxial shield flow transfer line and matrix heat exchanger for low helium consumption and high cooling power.
Applications
Micro-Raman
Quantum dots
Photoluminescence
Micro-photoluminescense
Electro-optical
Magneto-optical
Typical Configuration
Cold head (LT3-OM)
Co-axial shield flow liquid helium transfer line
Stainless steel instrumentation skirt
Dewar adapter
Flow meter panel for helium flow control and optimization
Nickel plated OFHC copper radiation shield
Instrumentation for temperature measurement and control:
10 pin hermetic feedthrough
36 ohm thermofoil heater
Silicon diode sensor curve matched to (± 0.5 K) for control
Calibrated silicon diode sensor (±12 mK) with 4 in. free length for accurate for sample measurement
Flat plate sample holder for optical experiments
Temperature controller
Features
Continuously adjustable sample height
Slim 1.52" profile
Nanometer level vibrations
Liquid helium flow
Matrix heat exchanger
Co-axial shield flow
4 K liquid helium operation (1.7 K with pumping)
0.7 LL/hr liquid helium consumption at 4.2 K
Liquid nitrogen compatible (77 K operation)
Precision flow control
Options & Upgrades
Transmission upgrade
Magnet post upgrade (to fit the warm bore of a magnet)
High flow transfer line
Custom temperature sensor configuration (please contact our sales staff)
Custom wiring configurations (please contact our sales staff)
Sample holder upgrades (custom sample holders available)
Window material upgrades (custom materials available)