PP3006 CoolLok Cryo Transfer for SEM and FIB/SEM
The PP3006 CoolLok offers rapid transfer and cryo temperature observation of specimens for SEM, FIB/SEM, beamline or other vacuum systems. Freezing is on-contact with the pre-cooled SEM or FIB/SEM cold stage, or specimens can be rapidly pre-frozen in slushy liquid nitrogen using the optional freezing station (24425). Applications include thermal protection of beam-sensitive specimens and low temperature observation of materials such as plastics, polymers low-K dielectrics and hard-soft mixtures. The system can also be used for inert gas transfer of ambient temperature specimens from a glove box.
Key features
• Rapid specimen exchange
• Temperature range down to -190°C
• Off-column cooling with all-day runtime between fills
• Independent cooling of cold stage and cold trap
• Vacuum or inert gas (glove box) transfer
• Rapid specimen freezing option 24425
• Cryo workflow options
System components include vacuum airlock and cooling gas feedthrough, specimen holders and transfer device, cold stage and cold trap, cooling dewar, trolley and controller, optional 24425 nitrogen slush freezing station, etc.
With the standard CoolLok, specimen freezing is by contact with the SEM cold stage following transfer and therefore freezing rates are relatively slow. This is generally suitable for hard, non-hydrated specimens, but for liquid-based material rapid freezing is essential to reduce the detrimental effects of ice crystal growth and to allow through-vacuum transfer onto the cold stage. For these applications the optional 24425 nitrogen slush freezing station is required.
An optional glove box valve/airlock assembly (25852) can be supplied. The airlock is connected to a glove box using a generic NW40 fitting and for most applications requires a suitable pumping system (13034 rotary pump or 2336 turbo plus diaphragm pump system). Gas connections are included. The outer face of the 25852 is designed to accept the vacuum transfer device.
The specimen is mounted on a suitable holder (shuttle) and the transfer device fitted onto the airlock and the dead space evacuated to a set vacuum level. The gate valve is opened and the specimen guided onto the SEM stage. For transfers from other vacuum systems, or a glove box, additional interface flanges are available on request. Vacuum transfers can be made from the optional 24425 trolley-mounted nitrogen slush freezing station, if fitted. This product is for Research Use Only
For applications where infrequent exchanges of specimens is expected, the PP3005 is only recommended. Looking for transferring ambient temperature specimens into SEM, FIB/SEM or other suitable vacuum systems? please see: PP3004 QuickLok. For many applications (especially lifesciences) cold fracturing and sputter coating are essential process steps and require the advanced capabilities of the PP3010 – a full cryo-SEM preparation system.
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