Bluefors-LH-horizontal-dilution-refrigerator-2018

LH System

The horizontal model LH is a low-height, compact and truly horizontal dilution refrigerator system capable of operation under different tilt angles. It is ideal for beam line, 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

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

Base temperature

Cooling power @ 20 mK

Cooling power @ 100 mk

Cooling power @ 120 mK

Cool-down time to base

Guaranteed

10 mK

10 μW

250 μW

360 μW

24 hrs

LH400

Base temperature

Cooling power @ 20 mK

Cooling power @ 100 mK

Cooling power @ 120 mK

Cool-down time to base

Guaranteed

10 mK

12 μW

400 μW

575 μW

24 hrs

Performance Graphs

1
2
3
4
5
6
Bluefors-cool-down-profiles-for-LH-dilution-refrigerator-2018
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 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 DR 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 DR 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.

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