Liquid Helium Dewars

Standard liquid helium dewars used for magnet systems are sometimes called “bucket-style” because the superconducting magnet assembly is loaded in from the top. These open-neck dewars are generally used where the user only requires access to the cold bore of the superconducting magnet.

Cryomagnetics provides aluminum/fiberglass or stainless steel constructed dewars. Each construction style has its own advantages over the other depending on the end-user’s particular experimentation process.

Standard bucket dewars are also available in bottom-loading. Generally used with large superconducting magnets, bottom-loading dewars can offer better liquid helium usage. This construction method allows for a smaller neck diameter, thereby lowering heat load to the liquid helium bath.

Some of the many options include LN₂ shielding, helium-vapor/superinsulated shielding, lambda breaks, belly sections, etc.

We will be glad to discuss your particular requirements and explain the tradeoffs between the construction method, type of shielding, options, overall performance, and cost.

Contact us today for more details.

Please click on the following links for more information:

• Technical Assistance
• Warranty Statement
• Stray Field Safety
• Ice Formation Safety
• Liquid Helium Transfer Line Handling Tips

Please Contact Cryomagnetics at sales@cryomagnetics.com or your local Sales Representative for a price quotation.

Cryomagnetics offers online ordering for electronic instrumentation:

• 4G Bipolar Power Supplies
• Liquid Cryogen Level Monitoring & Control
• Temperature Monitoring & Control
• Magnetic Field Monitoring & Control

and cryogenic accessories:

• Liquid Helium Level Sensors
• Liquid Nitrogen, Oxygen, LNG Level Sensors
• Temperature Sensors
• Hall Effect Sensors
• Helium Vapor-Cooled Current Leads
• Liquid Helium Transfer Lines
• Duty-Cycle Optimized Current Leads