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After 50 Years of ASC and Magnet Conductors, What’s Next?

Past and present superconducting magnet technology suggests that cheap, strong, available-by-the-ton Nb-Ti alloy conductors will always be used unless it’s absolutely necessary to use another superconducting material. In this decade “absolutely necessary” has taken on a clearer definition, thanks to ITER, the upgrade of LHC, 1 GHz NMR magnets, the...

Laser Powered Cryocooling Drops to 91 K

Over the last couple of decades researchers around the world have been working on optical refrigeration, a new solid-state cooling scheme based on light-matter interactions, and a team of researchers from the University of New Mexico (UNM) and ThermoDynamic Films, LLC (TDF) is currently working to harness the physics of...

Testing JWST’s MIRI Cooler Compressor Assembly

The James Webb Space Telescope’s (JWST) Mid InfraRed Instrument (MIRI) cooler subsystem features a closed cycle helium Joule-Thomson (JT) cryocooler pre-cooled by a three-stage pulse tube cryocooler. In this paper, researchers from Northrop Grumman discuss tests conducted on the CCA, a flight model sub-assembly that compresses and precools MIRI's helium...

Cryogenic System to Cool Malaysian Data Center

An international consortium has announced plans to construct a green data center that features liquid submersion cooling at a location in Malaysia's Klang Valley. The project aims to increase the sustainability of data centers by changing the way facilities are cooled, therein reducing energy consumption by up to 50 percent,...

Fine-Tuned Cryogenic Clock Improves Computing Capabilities

Researchers from the University of Adelaide in South Australia have enhanced the cryogenic sapphire clock to achieve near attosecond capability. Also known as a microwave oscillator, the clock features a five cm cylinder-shaped crystal cooled to -269°C.

New Graphene Hybrid Exceeds DOE Goal for Hydrogen Storage

Layers of graphene separated by nanotube pillars of boron nitride may be a suitable material to store hydrogen fuel in cars, according to a new computational study from Rice University published in the journal Langmuir. The material held 14.77 percent of its weight in hydrogen at -321°F, exceeding both current...

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Dewar

A dewar is a type of cryostat named after Sir James Dewar, the researcher who first developed the concept of a vacuum insulated container with silvered walls to reflect thermal radiation. Dewar was the first to liquefy hydrogen, and he created the device to store his discovery. The thermos bottle...

Stirling and Gifford-McMahon Cryocoolers

Stirling and Gifford-McMahon (GM) cryocoolers are two of the most commonly used cryocoolers in cryogenics. Both devices have a significant industrial base and operate at a wide range of temperatures and capacities. The thermodynamic cycles for both of these cryocoolers are quite similar. The Stirling cycle consists of a compressor,...

Liquefied Natural Gas (LNG)

A significant commercial application of cryogenics is the liquefaction, transport and storage of natural gas. Liquefied Natural Gas (LNG) is generally 95 percent methane with a few percent ethane and much lower concentrations of propane and butane. LNG liquefies at 111.6 K. Unlike many applications of cryogenics, the motivation for...

Air Separation and Liquefaction

by Nils Tellier, PE, President, EPSIM Corporation (CSA CSM) nils@epsim.us All illustrations courtesy EPSIM Corporation Background History of Air Separation and Liquefaction This section builds on a rich history of methods to develop deep refrigeration and cryogenic liquefaction during the 19th Century. You are encouraged to read Cryo Central’s History...

Bose-Einstein Condensate

A Bose-Einstein condensate, first proposed in 1925 by Albert Einstein based on work done by Satyendra Nath Bose (the same Bose from whom the term boson is derived), is a super-cold state of matter in which almost all of the individual atoms have “condensed” down to the lowest possible quantum...

Cold Technology for Pest Control

While it does not reach temperatures cold enough to be called cryogenic, carbon dioxide snow is at the heart of a new way of dealing with unwanted pests. It utilizes a quick freezing process that takes advantage of the properties of carbon dioxide snow and has a number of benefits...

Cryogenic Finishing

The following 3 articles discuss the uses and procedures of various type of cryogenic finishing. 1) By Robin A. Rhodes, Cryogenic Institute of New England, Inc. rrhodes@nitrofreeze.com Cryogenic Deflashing is employed to remove undesired residual mold flash that remains on molded parts after they are removed or ejected from the...