Cold Facts Digital – Page 63 – The go-to place for Cryogenics and Superconductivity

Making High Temperature Superconductivity Disappear to Understand Its Origin

Scientists at Brookhaven National Laboratory have collected evidence suggesting that a purely electronic mechanism causes copper-oxygen compounds to conduct electricity without resistance at temperatures well above absolute zero by studying a well-known cuprate containing layers made of bismuth oxide, strontium oxide, calcium and copper oxide (BSCCO).

What a Pair: Coupled Quantum Dots May Offer a New Way to Store Quantum Information

Researchers at the National Institute of Standards and Technology (NIST) and their colleagues have for the first time created and imaged a novel pair of quantum dots—tiny islands of confined electric charge that act like interacting artificial atoms. Such “coupled” quantum dots could serve as a robust quantum bit, or...

Transformative ‘Green’ Accelerator Achieves World’s First 8-pass Full Energy Recovery

Scientists from Cornell University and the US Department of Energy’s (DOE) Brookhaven National Laboratory (BNL) have successfully demonstrated the world’s first capture and reuse of energy in a multi turn particle accelerator, where electrons are accelerated and decelerated in multiple stages and transported at different energies through a single beamline....

The Future of Particle Accelerators May Be Autonomous

Operators at the Linac Coherent Light Source (LCLS) particle accelerator, part of SLAC National Laboratory at Stanford University in California, looked into how they were spending their time managing the machine. They tracked the hours they spent on tasks like investigating problems and orchestrating new configurations of the particle beam...

60 Years of DESY: From Hamburg Particle Accelerator to Global Research Center

For the past 60 years, fundamental research has been carried out at the Deutsches Elektronen-Synchrotron (DESY) in Hamburg-Bahrenfeld. In those 60 years, DESY has become a world leader in accelerator technology, structure research, particle physics and astroparticle physics. DESY has developed pioneering technologies, which have been used by scientists from...

Jefferson Lab to be Major Partner in Brookhaven Electron Ion Collider Project

The Department of Energy (DOE) announced that it has taken the next step toward the construction of an Electron Ion Collider (EIC) in the United States. DOE announced that the collider will be sited at DOE’s Brookhaven National Laboratory in Upton NY. In addition, DOE’s Thomas Jefferson National Accelerator Facility...

Latest in Defining Cryogenics

Dewar

A dewar is a type of cryostat named after Sir James Dewar, the researcher who first developed the concept of a vacuum insulated container with silvered walls to reflect thermal radiation. Dewar was the first to liquefy hydrogen, and he created the device to store his discovery. The thermos bottle...

Stirling and Gifford-McMahon Cryocoolers

Stirling and Gifford-McMahon (GM) cryocoolers are two of the most commonly used cryocoolers in cryogenics. Both devices have a significant industrial base and operate at a wide range of temperatures and capacities. The thermodynamic cycles for both of these cryocoolers are quite similar. The Stirling cycle consists of a compressor,...

Liquefied Natural Gas (LNG)

A significant commercial application of cryogenics is the liquefaction, transport and storage of natural gas. Liquefied Natural Gas (LNG) is generally 95 percent methane with a few percent ethane and much lower concentrations of propane and butane. LNG liquefies at 111.6 K. Unlike many applications of cryogenics, the motivation for...

Latest in Cryo Central

Cryogenic Electronics

Randall Kirschman, consulting physicist, Mountain View, California ExtElect@gmail.com Cryogenic electronics—the operation of electronic devices, circuits, and systems at cryogenic temperatures—has been a valuable technology for decades. Cryogenic electronics (also referred to as low-temperature electronics, or cold electronics) can be based on semiconductive devices, on superconductive devices, or on a combination...

Particle Physics: High Energy Physics

Cryogenics and High-Energy Physics 1. From symmetry magazine: http://www.symmetrymagazine.org/cms/?pid=1000627: Cryogenics is the study of how materials behave at temperatures near absolute zero. In high-energy particle accelerators, such frigid temperatures reduce the electrical resistance of wires in superconducting magnets, increasing the magnet strength and allowing faster particle acceleration. The same holds...

HTS Degaussing Systems

From the Spring 2009 issue of Cold Facts (Volume 25, Number 2): Thanks to a joint project by the US Navy and a number of industry partners, high temperature superconducting (HTS) technology is now at the heart of an advanced degaussing system aboard the USS Higgins at the naval station...

Magnetic Resonance Imaging

From http://www.superconductors.org: An area where superconductors can perform a life-saving function is in the field of biomagnetism. Doctors need a non-invasive means of determining what’s going on inside the human body. By impinging a strong superconductor-derived magnetic field into the body, hydrogen atoms that exist in the body’s water and...

Latest in Ask the Experts

Manufacturers of cryogenic regenerator lead spheres?

Would you please suggest a few manufacturers that produce cryogenic regenerator lead spheres? The size we need is 0.15mm-0.2mm. I don’t have a lot of ideas for where to go to purchase them.

Assistance with resolving a sealing problem?

We are fabricating piping components for refrigeration service. These components must be leak checked at 15 bar (218 psig). We are using a gas test media that is 25% helium and experiencing difficulty on maintaining a seal on the flanged connections. Do you know anyone or any references that could...

Cryogenic data on leather and nomex

Could anyone please help me out with the following cryogenics data: Leather — mechanical properties at 77 K or lower Nomex — thermal conductivity @ 4 to 50 K I lost the data I had some time ago and although this should be easily accessible, I can’t find any reference...

Thermal expansion data for quartz at cryogenic temperatures (20 – 300 K).

I am looking for thermal expansion data for quartz at cryogenic temperatures (20 – 300 K). Does anyone have any such data?

CATEGORIES