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Hydrogen rocket technologies prepare for lift-off

An engine which is fueled by a mix of liquid oxygen and hydrogen has been developed to demonstrate advanced rocket technologies for future space vehicles, such as lunar vehicles, and has achieved a technical milestone in throttling capability.

Drell appointed acting director at SLAC

Persis Drell has been appointed acting director at the Stanford Linear Accelerator Center (SLAC); she was formerly deputy director. She succeeds Jonathan Dorfan who becomes assistant to the president, focusing on the relationship between Stanford University and SLAC.

Norman R. Augustine speaks at AAAS meeting

During the AAAS meeting held on February 18, 2008, Norman R. Augustine shared some challenging and interesting insight into the alarming state of science and technology research and education in the United States.

Tevatron sets a new record

The Tevatron set a new record on Monday, March 17, 2008 when it produced more particle collisions per second than ever before. Breaking the barrier of 3E32 for the first time, the Tevatron reached a record peak luminosity of 3.15 E32 cm^ -2 sec^ -1. The record came on the...

Wild turkeys wreak havoc at Berkeley Lab

Wild turkeys have become a problem at Lawrence Berkeley National Laboratory in California.

Professor Makarow new head of ESF

Professor Marja Makarow recently began her duties as Chief Executive of the European Science Foundation and is the first woman in the organization's 34-year history to hold the top position.

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

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...

Latest in Ask the Experts

Looking for the thermal conductivity of the high density polyethylene (HDPE) between 1.9 and 10K

I am looking for the thermal conductivity of the high density polyethylene (HDPE) between 1.9 and 10K (or even up to higher temperatures). The best would be to have these data for the HDPE material which sold by the CERN shop, which has a density of 0.95 g/cm3. Pier Paolo...