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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...

Georgia Tech researchers use ultra cold chemistry to study atoms

Researchers at the Georgia Institute of Technology have received a $900,000 grant from the US Air Force Office of Scientific Research to study the unusual chemical and physical properties of atoms and molecules at micro-kelvin or nano-kelvin temperature ranges approaching absolute zero, the temperature at which all thermal activity stops....

Cosmological simulation models birth of universe

Researchers led by scientists at the US Department of Energy's (DOE's) Argonne National Laboratory have performed one of the largest cosmological simulations ever. Run on the Titan supercomputer at DOE's Oak Ridge National Laboratory, the simulation modeled the evolution of the universe from just 50 million years after the Big...

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Two-Phase Flows

Two-phase flows are those flows in which there is a mixture of two physical states (solid, liquid or vapor). In cryogenic applications, such flows are almost always a mixture of a cryogenic liquid along with its corresponding vapor. A mixture of liquid helium and helium vapor would be a typical...

Supercritical Fluids

A supercritical fluid is defined as a substance whose temperature and pressure exceed those of its critical point. Every pure substance has a critical point that is defined in thermodynamic space by a critical temperature and a corresponding critical pressure. For example, the critical point for helium has a critical...

Brayton Cycle

The Brayton cycle is one of the many thermodynamic cycles used to generate cooling at cryogenic temperatures. Strictly speaking, when referring to cooling we should call this the reverse Brayton cycle as the original Brayton cycle describes the process of power generation or propulsion via a gas turbine. In many...

Magnetic Levitation

From http://www.superconductors.org. Magnetic-levitation is an application where superconductors perform extremely well. Transport vehicles such as trains can be made to “float” on strong superconducting magnets, virtually eliminating friction between the train and its tracks. Not only would conventional electromagnets waste much of the electrical energy as heat, they would have...

Superconductivity

From Superpower website. History of Superconductivity Superconductivity was discovered in 1911 by the Dutch physicist, Heike Kammerlingh Onnes when he was able to liquefy helium by cooling it to 4 Kelvin, or -452°F. This enabled him to cool other materials close to absolute zero and investigate their electrical properties. He...

Medical Applications of Cryogenics

Neutron Therapy Cryogenics is at the heart of nuclear accelerators. Accelerators such as Fermilab’s Tevatron make neutron therapy for cancer possible. From Fermilab Today 4/20/09: Fermilab currently offers neutron therapy. But staff at Fermilab designed and built the proton accelerator used by the nation’s first hospital-based treatment center to use...

Nuclear Physics

Al Zeller National Superconducting Cyclotron Lab (NSCL) at Michigan State University zeller@nscl.msu.edu Cryogenics has a long history in nuclear physics. The technology has its origins in the use of cold traps for maintaining a vacuum, which is required to prevent beam loss and for generating high voltages used in acceleration....

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...