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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

Transfer Lines

Transfer lines may in some real sense be thought of as the cryogenic fluid analogy of current leads. While current leads carry electrical power to where it’s required in a cryogenic system, transfer lines do the same with cryogenic fluids. Transfer lines range in complexity from very simple U-tubes containing...

Zero Boiloff

Zero Boil Off cryostats are those that contain liquid cryogens but are designed to eliminate or vastly reduce the boil off of the liquid. These cryostats combine some of the advantages of Cryogen-Free systems (e.g. ease of use and long operational lifetime) with the advantages associated with a reservoir of liquid...

Cryomodule

Cryomodule is a term that is most commonly used to refer to cryostats that contain superconducting radio frequency (SRF) cavities. Such cavities are used to accelerate charged particle beams and are a major component of modern particle accelerators. Using the term cryomodule to refer to cryostats containing SRF cavities appears...

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

Power requirement to liquefy hydrogen gas?

What is the power requirement to liquefy hydrogen gas?

Effect of cryogenic freezing on tone of bell?

I have been making bells for a few years out of Bell Bronze, 87% Copper. Would cryogenic freezing have any effect on the tone of a bell if I had it treated after casting? Your help would be appreciated.

Thermal conductivity of niobium, tantalum, lead, tin

I am interested in the thermal conductivity and other properties of low temperature superconductors. Specifically I am interested in materials like Niobium, Tantalum, Lead and Tin. Would you know of a publication that dealt with thermal properties in general and also gave specific data on these materials?

Could boxes of paper records be freeze-dried?

In the event of a disaster such as a flood, could boxes of paper records be freeze-dried? Could cryogenics help in the recovery efforts?

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