Since 1983, Cryomagnetics has been a world leading manufacturer of liquid-helium based (wet) superconducting magnet systems. Our comprehensive in-house manufacturing capabilities insures the highest quality possible. Unlike many other companies offering superconducting magnet/dilution refrigerators – we are not simply a multi-manufacturer integrator. We ARE the manufacturer and do not rely on subcontractors for major items of the system.
Likewise, Cryoconcept is also a world leader in traditional, liquid helium based dilution refrigerators. Over the years, many innovative dilution refrigerators for high power, inverted, pulsed-magnetic field, etc. have been delivered.
Combining both companies’ strengths results in a dilution refrigerator/superconducting magnet system with unmatched performance, reliability, and ease of use.
The dilution refrigerator is available with up to 400μW of cooling power at 100mK and a base temperature of less than/equal to 10mK. The superconducting magnet is available with fields up to 15 Tesla with a variety of bore sizes and homogeneous volumes.
Many configurations are available:
- Traditional top-loading bucket dewar systems, highly-efficient superinsulated or LN2-shielded.
- Bottom loading bucket dewar systems for larger superconducting magnets allows for reduced dewar neck diameter and better LHe loss rates.
- Vibration isolation options for sensitive experiments.
- Room temperature bore magnet systems with a separate dewar system for the dilution refrigerator.
- Custom-designed to fit your particular application.
The system also incorporates an automatic gas handling system optimized for use with the dilution refrigerator. Control is through a user-friendly touch-screen interface or remotely through an Ethernet interface. The superconducting magnet can be controlled through Ethernet, USB, or IEEE-488 interface.
A typical 400µW dilution refrigerator is pictured above.
Please visit Cryoconcept’s website for more information.
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At left is a typical dilution refrigerator / superconducting magnet system installation.
This system contains a 9T superconducting magnet with 2.0″ cold bore.
The dewar is high efficiency superinsulated without a liquid nitrogen shield to minimize maintenance.
The dilution refrigerator is 100µW at 100mK with a base temperature of <10mK.
At the far left-hand side of the picture is the fully automated gas-handling system. Everything may be controlled via our user-friendly Cryograf software.
Example 9T Superconducting Magnet with Dilution Refrigerator Quotation
Use this example to help define your specific needs…
Solenoid configuration with 2.0″ clear bore.
9 Tesla central field (4.2K) at approximately 43 amperes.
+ 0.1% central field homogeneity over a 10 mm DSV.
Persistent mode switch installed.
Fully protected against damage due to quench.
Fully tested at 4.2K.
High efficiency superinsulated open neck, bucket style.
50 liter usable liquid helium volume.
Evacuation valve, safety positive pressure relief devices.
Magnet Support Assembly/Dewar Top Plate
Copper thermal radiation baffles.
LHe fill/vent ports.
LN2 precool/removal tube.
Quench relief valve.
Redundant one PSI safety pressure relief valve.
B-50, 50 ampere Duty-cycle Optimized current leads.
Superconducting magnet bus bars, magnet supports.
Sample access port, with o-ring groove, o-ring, and bolt circle.
Cover plate for sample access port.
19-pin electrical feedthrough, 15 foot long instrumentation cable
Superconducting LHe level sensor installed.
Set up as a 2-channel instrument to simultaneously monitor both liquid helium and liquid nitrogen levels.
240 x 400 TFT LCD display.
Simple, intuitive user interface.
Sample and hold operation. (1 minute to 99 hours settability)
Manual update or continuous operation.
Sensor de-ice cycle. (LHe only)
Sensor calibration via front panel menu.
Can drive sensors up to 200cm active.
High and low setpoint control output.
LabVIEW® drivers available.
See photo and further description www.cryomagnetics.com/products/model-lm-510-liquid-cryogen-monitor/
Available options installed:
Option 1: Analog Output. 0-1 Volt
Option 2: IEEE-488.2 Interface.
The Model 4G-100 is a single output model with output current up to ± 100 amperes at 800 watts (± 10 volts up to 80 amperes, ± 8 volts at 100 amperes).
4-quadrant, true bipolar systems featuring smooth sweeps through zero.
Automatic quench detection and protection.
A full color, backlit TFT liquid crystal display clearly indicates output current, voltage, limit settings, and system status.
Current settability of 0.1 milliamps
Five (5) programmable sweep rate ranges.
Persistent switch heater power supply.
15 foot length output cables.
USB, IEEE-488.2, and Ethernet computer interfaces standard.
Safety interlocks for persistent switch enable/disable and changing of important magnet parameters and limits.
Visual confirmation of current present in leads will alert users to be mindful of safety when operating the power supply, even if line power is off.
Dilution Refrigerator System
Base temperature: < 10 mK guaranteed.
Cooling power: > 200 microwatt @ 100 mK.
He3 injection valve.
NW16 right angle valve (isolation vacuum).
NW63 gatekeeper valve (pumping line).
A Jaeger 12 pins connector for temperature measurement (still temperature and mixing chamber temperature).
A Lemo connector for heater (still heater and mixing chamber heater).
(3) 38mm ID inputs in vacuum or helium bath.
1 thermometer on the still.
1 Ruthenium Oxide thermometer on the mixing chamber plate packaged in copper holder.
Calibrated from 4,2K to 9mK by Nuclear orientation and Ge standard
Wired with 0.25 mm and 0.1 mm manganin wires.
Extra wiring for 2 thermometers.
AUTOMATIC Gas Handling System:
Computer with tactile screen.
Rotary vane pump.
Electro and Pneumatic valves.
Optimized 3He-4He mixture in stainless steel tank.
External nitrogen cold trap including nitrogen Dewar.
Power supply: 200V, single phase, 50Hz.