PP3005 SEMCool non-airlock cryo-SEM system
PP3005 SEMCool non-airlock cryo-SEM system
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.
Walk through the Cryo-SEM Preparation System Laboratory
Features:
- Temperature range down to -190°C
- Off-column cooling with all-day runtime between fills
- Independent cooling of cold stage and cold trap
- Upgrade path to PP3006 CoolLok
- Extended warranty option
- Various stubs, shuttles and specimen holders are available separately
Cold stage and cold trap
A highly stable and thermally isolated nitrogen gas-cooled cold stage attaches to the SEM stage. The location and shape of the cold trap is tailored to suit the internal geometry of the SEM. 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 interlocked LED chamber light is fitted.
The cold stage connects to the SEM stage using an adaptor and has a dovetail fitting to accept a cryo 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 floor-mounted, vacuum isolated 21 litre 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 SEM interface are vacuum isolated for maximum thermal efficiency.
The cooling dewar is located on a floor-mounted trolley which also houses the temperature and gas control system.
Using the SEMCool
Vent the microscope and manually locate specimen holder on the cold stage. Evacuate the microscope and then cool the SEMCool 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).
Specifications:
| Model |
PP3004 | PP3005 | PP3006 |
| Temperature | Ambient | RT to -190°C | |
| Cooling runtime | N/A | Up to 24hrs | |
| Dewar capacity | N/A | 30L | |
| Cool down time to -190°C * | N/A | <15 minutes *Under standard laboratory conditions |
|
| Rapid freezing (slushy LN2) | N/A | Optional (QUO24429) | |
| Dewar trolley footprint | N/A | 50 x 50cm | |
| Airlock weight | 2.5kg | ||
| Pumping requirements | Turbo Pump | Rotary Pump | Turbo Pump |
| Nitrogen gas | Venting and valve operation | Venting and cooling | |
| Power requirements (excluding pump) | 300W | ||
| Maximum specimen size | Flat specimens up to 23 x 26mm. For taller specimens the maximum height will reduce from a mid-point of 9mm. | ||
Ordering Information and Compatibility Details
| QUOPP3005 |
Includes: Nitrogen gas cooled stage with heater and sensor and cold trap with temperature sensor. Precise temperature control with a range down to 190°C, 21L liquid nitrogen dewar with trolley, heat exchanger and LED chamber light. Pump fittings (see: Pumping below). Temperature and nitrogen gas flow controller mounted on the dewar trolley. Specimen holders: 3 x QUOAL200077B specimen shuttle (to hold 10mm Ø cryo stubs) QUO12434 blank specimen shuttle QUO20720 specimen shuttle with holding clips QUOE7402 blank 10mm ? stubs (packet of 10) 5 x QUOE7449-7 multi-purpose specimen stubs. Note: other holders are available from Quorum. Specimen mounting compounds (colloidal graphite and Tissue-Tek). |
| Pumping - The PP3005 requires a rotary pump for evacuating the vacuum isolated gas lines. Recommended: QUO13034 - Pfeiffer DUO 6 two-stage rotary vacuum pump, 240V | |
| Options and accessories | |
| 13296 | Sircal in-line gas dryer. Helps to reduce water content of nitrogen gas supply if an external gas source is used |
Images are illustrative only. Please check product details before ordering.
