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Authorities call for regulation of cryotherapy

Investigation into the recent death of Chelsea Ake-Salvacion in a liquid nitrogen cryotherapy chamber at RejuvenIce in Henderson NV points to oxygen deprivation as the cause of death. In the wake of this tragic accident, authorities are calling for steps to regulate the use of cryotherapy, which has recently been...

LCLS researchers discover new dimension to high temperature superconductivity

A team led by scientists at the US Dept. of Energy (DOE)’s SLAC National Accelerator Laboratory observed a new type of "charge density wave" after combining powerful magnetic pulses with some of the brightest X-rays on the planet. The resulting 3-D effect appears closely linked to high temperature superconductivity, though...

Obituary: Former BCC Chairman Harry Jones

Professor Harry (Henry) Jones died on August 24, 2015, at 70 years of age. He was a professor of condensed matter physics at the Clarendon Laboratory, Oxford University, where he worked for 44 years until his retirement in 2012. Jones also led the High Magnetic Fields and Superconductivity Group, the...

Dimitri Delikaris named head of CERN Cryogenics Group

Dimitri Delikaris was appointed head of the CERN Cryogenics Group (CRG) on November 1, replacing Laurent Tavian. The CRG is responsible for the development, operation and maintenance of cryogenic systems used for the LHC collider, the fixed targets program and related cryogenic test facilities.

New superconducting transistors remain superconducting even in strong magnetic fields

Scientists have used molybdenum sulfide to create superconducting transistors that remain superconducting even under powerful magnetic fields that normally destroy the effect. "We have found a superconducting state that is super-robust against magnetic fields," says Justin Ye, a physicist at the University of Groningen in the Netherlands and co-author of...

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Helium-3

Helium-3 (3He) is one of the two stable isotopes of helium. The other is the much more common Helium-4 (4He). Neither of these isotopes should be confused with He II, which is the second liquid phase of 4He. He II was discussed in this column in the Spring 2010 edition...

Cryopumping

Cryopumping refers to the use of cryogenic temperatures to produce vacuum in enclosed spaces. More broadly, it can also refer to the removal of gases via cryogenic temperatures from a flow stream or enclosure without necessarily resulting in vacuum pressures. This is an important application of cryogenics and is used...

Thermal Acoustic Oscillations

Thermal Acoustic Oscillations (TAO) are a common event in cryogenic systems that can have significant adverse effects on the performance of the system. TAOs are sustained pressure oscillations that can occur in tubes containing gas, closed at one end (the warm end) that have a very large temperature gradient along...

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...

An Issue of Pressure and Flow Rate in a Supply Tank

Please help solve this problem: A supply tank requires a vaporizer to generate sufficient pressure to pump stored fluid up into a vehicle or tank. The available head is limited as the tank level falls and it is important to minimize the system pressure drop to maintain the desired flow...

Using MLI on VJ Line Joints or Cryo Storage Tanks

When installing Multi Layer Insulation (MLI) blankets on VJ line joints or cryo storage tanks should they be wrapped and tied down tight or loose? These are usually pre-cut to size. Also should they have an access hole at the point of where the molecular sieve is installed to help...