GAWDA issues bulletin in response to helium tragedy
GAWDA, the Gases and Welding Distributors Association, has issued an important helium bulletin in response to a tragedy following inhalation of the gas.
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Oxford Instruments to supply tools to the Catalan Institute of Nanotechnology for graphene research
Oxford Instruments has been selected by the Quantum Nanoelectronics Group from the Catalan Institute of Nanotechnology (ICN), in Barcelona, to supply tools to be used for graphene research.
Physicist Marvin L. Cohen receives Carnegie Mellon’s Dickson Prize in Science
Carnegie Mellon University awarded its 2011 Dickson Prize in Science to Marvin L. Cohen, one of the most influential condensed matter physicists in the world.
Physicists, medical industry team up to build advanced cancer therapy accelerator
A new collaboration between the U.S. Department of Energy’s Brookhaven National Laboratory and Best Medical International (BMI) aims to design one of the most dynamic and effective cancer therapy devices in the world.
Fermilab’s SRF program incorporates old equipment into new designs
Some people make coffee coasters out of old newspapers or lawn ornaments out of rusty shovels. Fermilab is building a particle accelerator that employs $28 million of recycled equipment and material.
Academics rallying to boycott Elsevier
Over 4,000 scientists have signed an online petition in protest over the pricing and distribution policies of Elsevier, a publisher which sells over 2,000 academic journals along with 20,000 other books. Many of the signatories are distinguished academics at such institutions as Harvard, Yale, McGill, Cambridge and Oxford. They promise...
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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...
Low temperature applications of titanium and alloys
For a technical presentation I would like to have some recommendations for low temperature applications of titanium and titanium alloys. Do you think you can help me?
Designing a liquid oxygen bath
I’m designing a Liquid Oxygen Bath to place composite coupons in the bath and soak 96 samples for intervals of 8 hours, 24 hours, 7 days, 21 days, 42 days, 62 days and 90 days.
School science projects involving cryogenics and metallurgy?
Can you recommend any school science projects that would involve cryogenics and metallurgy?
Metallic Salts Normally Used to Produce Ultra-Low Temperatures?
Regarding the method known as the Adiabatic Demagnetization of Paramagnetic Salts: What metallic salts are normally used to produce the ultra-low temperatures used for near-absolute-zero cryogenic research? Which salts are the most efficient? Which make the best cooling agents? And which are used most commonly by physicists? I am looking...