CRYO-SEM & CRYO-FIB/SEM PREPARATION EDITION III


zzzCryo Transfer Systems (continued) PP3005 SEMCool


Non-airlock cryo cooling for SEM, FIB/SEM, beamline and vacuum platforms Quick Overview


The SEMCool is based on the PP3006 CoolLok but without the PP3004 QuickLok components. It is designed for cryogenic applications where airlock exchange of specimens into the microscope is not required.


Key Features z Temperature range down to -190°C, with stability better than 0.5°C


z Off-column cooling with all-day runtime between fills


Components


Specimen holders and transfer device: The compact vacuum transfer device has an easy- release bayonet fitting to a dovetail-profile specimen holder (shuttle). Standard shuttles are included, but optional holders allow a range of different specimen types to be handled.


Cold stage and cold trap: A highly stable, thermally isolated, nitrogen gas-cooled cold stage attaches to the microscope stage. The location and shape of the cold trap is tailored to suit the internal geometry of the microscope. Both cold stage and cold trap are capable of reaching temperatures down to -190°C with a stability of <0.5°C. For easy specimen exchange an LED chamber light is fitted.


The cold stage connects to the microscope stage using an adaptor and has a dovetail fitting to accept a specimen holder. When not in use the cold stage is uncoupled and stored within the chamber with the gas and electrical fittings connected.


Cooling dewar, trolley and controller: The cold stage and cold trap are cooled by a remotely- positioned, vacuum isolated 21 L dewar and heat exchanger assembly which at normal operating temperatures can run for up to 24 hours between fills. The gas lines between the dewar and the microscope interface are vacuum isolated for maximum thermal efficiency.


The cooling dewar sits on a floor-mounted trolley which also houses the monitor/controller for cold stage and monitor for cold trap, plus nitrogen gas flow controllers.


Use


Vent the SEM, locate specimen holder on the cold stage, re-pump the SEM and then cool down to the required temperature. To exchange specimen, warm to above 0°C and vent the SEM.


Pumping


The SEMCool requires a rotary pump to periodically evacuate the vacuum isolated lines (see Ordering Information).


z Independent cooling of cold stage and cold trap


z Upgrade path to CoolLok z 3 year warranty


PP3005 SEMCool


Cold trap - adapted to installation


Temperature controller


Controller and cooling system


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