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

Chart Announces Sale of Qdrive Technologies

Chart Industries, Inc. (CSA CSM) has completed the sale of certain assets related to its Qdrive® set of products to RIX Industries. For the past several years Chart has developed and supplied QDrive technologies to RIX in support of liquid oxygen systems for military applications. Qdrive operations currently located in...

HYPRES Launches New Subsidiary, Expands Efforts in Quantum Computing

HYPRES, a CSA CSM known as the Digital Superconductor Company, has launched Superconducting Energy Efficient Quantum Computing, or SeeQC, a wholly owned subsidiary headquartered in Rome. SeeQC will focus on developing superconducting technologies for a variety of applications, including scalable fault-tolerant quantum computing, quantum communications and quantum simulators. The company...

Cleaning the LHC, Where Air Particles Count as Dirt

Inside the Large Hadron Collider, beams of particles sprint 17 miles around in opposite directions through a pair of evacuated beam pipes. The interior of the pipes needs to be spotless, but it’s not dirt or grime that clogs the LHC—it’s microscopic air molecules.

Cool Pair Plus Expands Distribution Services to Asia

Wincosyn Solution Co., Ltd., of China has selected Cool Pair Plus (CSA CSM) to support its multiple MRI systems, specifically magnet sub-systems, throughout China. Wincosyn Solution is an integrated delivery network of nine independent service companies that provide hospitals turnkey solutions for CT, MRI, and Cath Labs, ECT and linear...

“Bad Metal” Reveals Clues to High-Temperature Superconductivity

A research collaboration based at Stony Brook University has found that “stripes” of electronic charge, which may play a key role in superconductivity, persist across surprisingly high temperatures, shape conductivity and have direction-dependent properties. The findings—published in Physical Review Letters—came as the group studied metals that conduct electricity poorly, looking...

NIST Hybrid Cooler Hits 2 Kelvin

NIST scientists have devised a novel hybrid system for cooling superconducting nanowire single-photon detectors (SNSPD). It uses a pulse-tube refrigerator cooled to 10 K to precool a Joule-Thomson cryocooler that can then reach 2 K. That level of cooling has typically been achieved with liquid helium systems that are costly,...

Latest in Defining Cryogenics

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...

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

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...

Separated layers of ice over a pipe

I want to know that why there are different layers of ice over a pipe carrying a cryogenic fluid, each layer separated with clear marks / lines? What do these layers signify?

Using nitrogen as a cryogen

Is it possible to achieve -200˚C using nitrogen as a cryogen?

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