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Natural SUSY’s last stand

In a paper entitled “Lessons and prospects from the pMSSM after LHC Run I” published in Physical Review D, researchers M. Cahill-Rowley, J. L. Hewett, A. Ismail and T. G. Rizzo report that, while the Large Hadron Collider (LHC)’s first run did not provide evidence of natural Supersymmetry (SUSY), SUSY...

LHC sees first low energy collisions

On May 5, low energy protons met in the hearts of the four Large Hadron Collider (LHC) experiments at CERN. These test collisions will help the ALICE, ATLAS, CMS and LHCb collaborations calibrate their detectors in preparation for the high energy collisions scheduled for early June.

Featuring Women in Cryogenics and Superconductivity

Several years ago, Cold Facts had a cover story on women in cryogenics and superconductivity. We thought it was time to introduce our readers to several more women who are excelling in our fields and find out more about their experiences in areas where they are still pretty much in...

Research and Development of Large-Scale Cryogenic Air Separation in China

Experts from Zhejiang University, Hangzhou Hangyang Co. Ltd. and Shanghai Jiao Tong University detail the history of the research and development of large-scale cryogenic air separation in China from 1953, in which the production capacity of an ASU was only 20 m3/h O2, to the present. Over 60 years of...

Cryocoolers and Cryostats

Cold Facts asked our members in the field of cryocoolers and cryostats to weigh in on the technology's most important developments, significant contributors and anticipated future advances. Here is a roundup of their replies.

Simulation of a Helium Dewar Using No Liquid Cryogens

NASA/Goddard Space Flight Center's Dr. Mark Kimball explains how to simulate the environment offered by a liquid helium dewar without using a liquid cryogen.

Latest in Defining Cryogenics

Mixed Refrigerant Cycles

Most cryogenic refrigeration systems, both large scale systems and cryocoolers, use helium as a working fluid. There are a number of advantages to helium, not the least of which is that helium remains a fluid down to the lowest achievable temperatures. In order to freeze helium, pressures of over 20...

Fountain Pumps and He II Phase Separators

Helium II (He II), the second liquid phase of the 4He isotope described in this column in Cold Facts Spring 2010 (http://2csa.us/he2), can be modeled as consisting of two interpenetrating fluids. One, the superfluid component, has zero viscosity and entropy and the other, the normal fluid component, has nonzero viscosity...

Turboexpanders

A vital technology in the refrigerators and liquefiers described in Cold Facts Volume 31 Number 3 is that of turboexpanders. These devices are rotating machines in which the process fluid (e.g., helium) does work against the turboexpander while moving from high pressure to a lower pressure and thus is cooled....

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

TS diagram for helium

Where can I obtain a really big, nice TS diagram for helium ?

Reliability and mounting of electronic substrates at low temperatures

I am currently working on the design of a focal plane assembly to be implemented on a small satellite (4 EMCCD detectors) to be operated at -80°C (which is not really cryogenic and likely still considered boiling hot for most of you :-). As it is passively cooled, the assembly...

Are 3D drawings included in the sale of a cryogenic plant?

I have a question concerning the 3D drawings of a cryogenic plant. The integration of the 3D drawings of a plant with the 3D main model of a new laboratory or a new facility can be a complex work that takes a lot of time. I would like to know...

Looking for a source of LOX impact testing to ASTM D2512

I have been looking for a source of LOX impact testing to ASTM D2512. I am aware of NASA and White Sands, but am looking for a commercial entity doing the work. No luck so far, even calling a lot of the folks on the CSA website. Any referrals will...

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