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Hybrid DC circuit breaker solution based on cryogenic technique

A hybrid DC circuit breaker comprised of a cryogenic contactor in series with a superconductor has recently been developed at NASA Glenn Research Center. This circuit breaker combines mechanical and solid-state technology to meet the needs of certain DC power system applications.

Issue No. 33 of Superconductivity News Forum is online

The quarterly Issue No. 33 of the Superconductivity News Forum (SNF) dated July 2015 is now available online at the IEEE Council on Superconductivity's website. The publication of the present issue was delayed to accommodate selected presentations and preprints from the recent CEC/ICMC 2015 and ISEC 2015.

10 years since Snowmass: an ILC timeline

Ten years ago, scientists from all over the world gathered in the picturesque town of Snowmass to constitute a new global collaboration for a future particle collider called the International Linear Collider (ILC). LC Newsline has compiled a timeline showing what has happened in these 10 years since Snowmass and...

James Fesmire to present NASA webinar on use of layered thermal insulation systems

James Fesmire will present a NASA webinar this Wednesday, August 26, at 2:00 pm ET on the benefits of using layered thermal insulation systems in industrial and commercial applications.

Lydall names new chief financial officer

Scott Deakin will join Lydall, Inc. (CSA CSM) as its new executive vice president and chief financial officer, effective September 8, 2015. He was formerly executive vice president and chief financial officer at Ensign-Bickford Industries, Inc.

MT24 will explore cutting-edge magnet technologies

MT24, the 24th International Conference on Magnet Technology, will take place at the Coex Center, Seoul, Korea, October 18-23. The conference, organized by The Korean Institute of Superconductivity and Cryogenics, will cover magnet technology ranging from large scale magnets to magnets for home appliances.

Latest in Defining Cryogenics

Dilution Refrigerators

Dilution refrigerators are a common technique for reaching temperatures below 1K, particularly where continuous cooling at these temperatures is required. Helium exists in two stable isotopes: 4He and 3He. Naturally occurring 3He is extremely rare, constituting less than 1 part per million of helium gas. However, 3He can be manufactured,...

Oxygen Deficiency Hazards

Oxygen Deficiency Hazards (ODH) are a significant safety issue in cryogenic facilities. ODH occurs when inert gases such as nitrogen, helium or argon displace room air and thus lower the percentage of oxygen in the space below that required for human life. OSHA defines an area as oxygen deficient if...

Kelvin Temperature Scale

The Kelvin temperature scale is the principal temperature scale used in cryogenics and science. The kelvin is also one of the seven base units in the Système International d’Unités (SI) and is the unit of thermodynamic temperature. Thermodynamic temperature is a fundamental physical quantity (like mass, length or electrical current)...

Latest in Cryo Central

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...

Latest in Ask the Experts

Thermal shock on steel cylinder when dropped into liquid nitrogen

We are a research team at the University of South Florida, studying the “thermal shock” on a steel cylinder when it is dropped into liquid nitrogen. We want to make sure that the thermocouple does not get influenced by the surrounding LN2. Any advice?

Getter materials to absorb out gassed materials?

Here’s one for the scientists: We would like to sell vacuum insulated pipe for high temperature fluid applications. Are there any good getter materials that we can place in the vacuum space of our VJP to absorb outgassed materials at elevated temperatures?

Data on Carbon Fibres Reinforced Plastic at temperatures between 4 and 300K.

I am looking for data on Carbon Fibres Reinforced Plastic at temperatures between 4 and 300K. I would appreciate it if someone could give me some hints on where to find it.

Design of cryostats and suspension mechanisms for insulation and cryostat shielding

I’m looking for information about the design of cryostats and suspension mechanisms for insulation and cryostat shielding.

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