Cryomagnetics acquires Cryoconcept
CSA Corporate Sustaining Member Cryomagnetics announced in March 2009 that it had acquired Cryoconcept, a company based near Saclay, France.
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Senate confirms six DOE nominees
From U.S. Department of Energy, May 21, 2009: This week, the Senate confirmed six DOE nominees, including Deputy Secretary Daniel Poneman, Under Secretary for Energy Kristina Johnson, and Under Secretary for Science Steven Koonin.
ONR’s George Stimak named “Top Navy Scientist and Engineer of the Year”
George Stimak, a program officer at the Office of Naval Research, has been named "Top Navy Scientist and Engineer of the Year" for breakthrough research on the first-ever HTS degaussing system for US Navy ships
Spitzer Space Telescope wraps up mission
From The Associated Press, May 18, 2009: Even as one of NASA's "Great Observatories," the Hubble Space Telescope, was being repaired this past week, another such orbiting light bucket was running out of coolant and wrapping up its mission.
Niowave acquires AMAC International
CSA Corporate Sustaining Member Niowave Inc. has announced the recent acquisition of all SRF Technologies and SRF Business from AMAC International of Newport News VA.
Herschel & Planck separate successfully
The European Space Agency reported today that at 15:49 CEST, Herschel and Planck sent their first radio signals to Earth, a sign that their separation was a success.
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Mixed Refrigerant Cycles
Most cryogenic refrigeration systems, both large scale systems and cryocoolers, use helium as a working fluid. There are a number of advantages to helium, not the least of which is that helium remains a fluid down to the lowest achievable temperatures. In order to freeze helium, pressures of over 20...
Fountain Pumps and He II Phase Separators
Helium II (He II), the second liquid phase of the 4He isotope described in this column in Cold Facts Spring 2010 (http://2csa.us/he2), can be modeled as consisting of two interpenetrating fluids. One, the superfluid component, has zero viscosity and entropy and the other, the normal fluid component, has nonzero viscosity...
Turboexpanders
A vital technology in the refrigerators and liquefiers described in Cold Facts Volume 31 Number 3 is that of turboexpanders. These devices are rotating machines in which the process fluid (e.g., helium) does work against the turboexpander while moving from high pressure to a lower pressure and thus is cooled....
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...
Information on how the emissivity of the panel changes with air fouling?
I work at a facility with a large thermal vacuum chamber. We are using both nitrogen and helium shrouds.
In search of a calculation for designing a cryostat
I am a final year physics student at the University of Birmingham, and as part of a group I am currently designing a cryostat. One of the calculations I need to make (very soon!) is how much heat will be conducted down the walls. All information I have found so...
Safety of ethylene glycol and pressurized oxygen
We are reviewing the product design of liquid filled differential level gauges and want to insure that they meet the industry requirements. The former license owner had authorized that a fill fluid of ethylene glycol (68%) and distilled water (32%) could be used for oxygen service up to 500 psi....
Heat flux in case of vacuum loss on cryogenic surfaces?
Is there anyone who has information about the heat flux in case of vacuum loss on cryogenic surfaces?