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...
Dry ice vs. LN2 for preserving tissue
I was wondering if anyone could provide feedback/data on whether it is best in terms of preserving tissue quality to freeze tissue in OCT using dry ice versus liquid nitrogen?
Are there lists of existing biorepositories?
We are a relatively new Biorepository that was developed as part of a large breast cancer epidemiology study, and thus far we have accumulated DNA on over 8000 women along with extensive questionnaire, mammography, and case status data. I was wondering, are there lists of existing Biorepositories with their contents?...
Heat flux value for inner vessel when vacuum insulation fails
To size a relief valve for a LN2 cryostat I have to know “worse case” boil-off rate when vacuum insulation failed and inner vessel with LN2 is in direct contact with room temperature air at 300K. So, I am looking for a heat flux value (watt/m2) to LN2 inner vessel...
Trying to design a system to store ammonia at -33°C
I am working on a project where we are trying to design a system to store ammonia at -33°C. In order to size the compressors to maintain the ammonia in the liquid state, I need to estimate the heat gained from the environment including the radiation from the sun and...