Bluefors Oy
Arinatie 10
00370 Helsinki
FINLAND
Tel: +358 9 5617 4800
Fax: +358 9 386 7335
VAT: FI 2183 2199
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Cool For Progress
LH Dilution Refrigerator System
The horizontal model LH is a low-height, compact and truly horizontal dilution refrigerator measurement system capable of operation under different tilt angles. It is ideal for beamline, telescope or detector experiments.
Eight LOS Access Ports
All line-of-sight ports reach from room temperature to mixing chamber.
- 2 x KF63 slotted in all flanges
- 4 x KF40
- 2 x KF16.
Temperature Controller
The Bluefors Temperature Controller enhance the user experience of our cryogenic systems. With a modern and intuitive user interface, you gain direct control and overview of the system’s temperature status.
The Bluefors Temperature Controller is fully-integrated to all dilution refrigerator measurement systems.
OPTIONS
Options
4K Heater Kit
Fully automated fast warm-up option, which allows overnight warm-up for our standard LD systems.
Service Packages and Extended Warranty are available upon request
Technical Specifications
Note: Cooling power is measured on experimental flange outside MXC.
| LH250 | Guaranteed |
|---|---|
| Base temperature | 10 mK |
| Cooling power @ 20 mK | 10 μW |
| Cooling power @ 100 mK | 250 μW |
| Cooling power @ 120 mK | 360 μW |
| Cool-down time to base | 24 hrs |
Performance Graphs
1
2
3
4
5
6
1
Start cool-down
2
Start pulse pre-cooling
3
Stop pulse pre-cooling
4
Start mixture condensation
5
Stop mixture condensation
6
Normal circulation mode
Above is a cool-down curve for a configuration of LH horizontal dilution refrigerator measurement system measured with a calibrated resistance thermometer.
Pulse pre-cooling sequence (see spots 2 and 3) is one of the key points in reducing the cool-down time. Because we do not use exchange gas some parts of the dilution refrigerator unit stay ‘hot’ on cool down, which prevents condensation of the mixture. By repeatedly admitting the mixture from the tanks through the low impedance still side of the dilution refrigerator and then pumping it out again, these hot spots are effectively cooled down.
Technical Requirements
The basic requirements are 3-phase electricity, cooling water, compressed air. The full list of requirements and specification details can be found in the Pre-Installation Guide, please contact our sales team for a copy.
Contact our sales team for questions, requests and Pre-Installation Guide.