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Jlab to test new ALON® windows for RF accelerators

This ALON optical ceramic, manufactured by Surmet Corporation, Burlington, Massachusetts, will be evaluated as a high power RF window material to replace the current “opaque” alumina window. At Jlab, ALON’s properties, such as thermal conductivity, thermal expansion coefficient and dielectric properties, will be measured down to liquid helium temperatures.

AMSC announces cost reduction action

AMSC, a CSA Corporate Sustaining Member, announced that it has reduced its workforce by more than 20 percent in order to lower the company’s cash usage as it works toward a return to profitability.

Muppet scientists at the LHC

If a big family trip to the movies is one of your holiday traditions, you might soon find yourself sitting with a fat tub of buttery popcorn at a screening of The Muppets, released November 23.

SGD acquires Special Gas Supplies LLC

SGD Inc., a single source wholesale supplier of specialty gas equipment, has acquired Special Gas Supplies LLC, a supplier to compressed gas cylinder fillers of shrink wrap, tamper-proof seals, status tags, cylinder status neck ring discs, cylinder netting, lecture bottles, and lecture bottle valves, and more.

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Cold Compressors

A common way to provide cooling below the normal boiling point of helium (4.2K) is to reduce the pressure above the bath of liquid helium, thus also reducing the bath’s equilibrium saturation temperature. For example, to produce a 1.8K bath of liquid helium, the saturation pressure has to be reduced...

Kapitza Conductance

Kapitza conductance refers to the heat transfer between a solid surface and a fluid that covers that surface. Fundamentally, it describes the inherent difficulty in transferring energy from a solid to the fluid covering the solid surface. This phenomenon was first observed by P. L. Kapitza in 1941 while studying...

Thermosyphons

A thermosyphon (or thermosiphon) is a device that transfers heat via natural convection in a fluid. The natural convection is driven by gravity with the colder, denser fluid flowing downhill and the warmer, less dense fluid flowing back up. Thus, thermosyphons connect an object to be cooled with a reservoir...

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...