Peter Kittel’s “Intro to Pulse Tube Thermodynamics” featured in Cold Facts
The first part of Dr. Peter Kittel's "Introduction to Pulse Tube Thermodynamics" was featured in the Fall 2012 issue of Cold Facts, which will be available for download soon.
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Dr. Joel Ullom receives CSA’s Roger W. Boom Award
Dr. Joel Ullom, 2012 CSA Roger W. Boom awardee, is the NIST Project Leader for superconducting calorimeter development and has worked in the fields of low temperature sensors, low temperature electronics and cryogenic systems since 1994.
Chemical synthesis achieves superconductivity at 44K
Physicists describe how they have synthesized a new material that belongs to the iron-selenide class of superconductors, called LixFe2Se2(NH3)y, in a paper about to be published in EPJ B. The work was carried out by Ernst-Wilhelm Scheidt from the University of Augsburg and colleagues.
CSA announces 2012 election results
CSA recently announced the results of the 2012 Board of Technical Directors election. The results were certified at CSA's board meeting at the Applied Superconductivity Conference in Portland OR.
NASA worker not fired over intelligent design, judge says
A California judge has tentatively ruled that a worker fired from NASA's Jet Propulsion Laboratory did not lose his job over his intelligent design beliefs.
Air Products licenses cryogenic machining technology to MAG IAS
Air Products has licensed its proprietary cryogenic machining technology to MAG IAS, LLC, a leading machine tool manufacturer.
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Helium II
Helium II (He II) refers to the second liquid phase of the most abundant helium isotope (4He). Helium II is also referred to as superfluid helium. Helium II occurs once the temperature of the liquid helium drops below 2.17K. The phase transition between the first liquid phase of Helium (referred...
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?