PIP-II to Advance Intense Particle Beam Physics
With the power of Proton Improvement Plan-II, Fermi National Accelerator Laboratory is planning to construct and operate the foremost facility in the world for particle physics utilizing intense beams.
ADVERTISEMENT
Pump Design and Operation Tips from DH Industries
Pumps and their efficiencies will increase the heat load of a closed loop cryogenic cooling system, so it is important that these pumps be as efficient as possible to minimize cost and supply use. Francesco Dioguardi, Martijn Donkers and Harrie Vermeulen of DH Industries provide pump design and operation tips...
Development of HTS CORC Cables for High Field Magnets and Advanced Power Transmission
Dr. Danko van der Laan, the 2014 Roger W. Boom awardee, discusses the development of high temperature superconductors (HTS) and their applications in high field magnets and advanced power transmission. He also explains an approach to cable ReBCO tapes called Conductor on Round Core (CORC™) cables, which feature layers of...
Superconductivity record bolstered by magnetic data
Nature reports that scientists in Germany have observed the common molecule hydrogen sulfide superconducting at a record-breaking 203K (-70°C) when subjected to very high pressures. Researchers A. P. Drozdov, M. I. Eremets, I. A. Troyan, V. Ksenofontov and S. I. Shylin report their findings in their paper "Conventional superconductivity at...
JSAP publishes inaugural issue of the JSAP Bulletin
The Japan Society of Applied Physics (JSAP) has published the first issue of the new JSAP Bulletin, a tri-annual online publication designed to highlight JSAP's activities and inspire a global audience engaged in academic and industrial research.
Fermilab Accelerator Division demonstrates Booster Neutrino Beamline operations
After five months of repairing and retooling the Booster Neutrino Beamline (BNB), members of the Accelerator Division at Fermi National Accelerator Laboratory successfully delivered beam to the BNB on June 22. The previous horn, BNB-2, was found to be inoperable in January when it was determined its cooling was no...
ADVERTISEMENT
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....
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...
Suppliers of regenerator materials
I was looking for suppliers of regenerator materials. Can you please provide a list of vendors for: • Lead spheres • Bronze screen discs • Rare earth materials and spheres Thank you in advance for any help you can provide.
Containing ice accumulation while recovering helium
We are implementing a system to recover helium from our Janis ST-500 continuous flow LHe cryostat. The recovery system uses standard 1/4″ plastic tubing, which we connect directly to the cryostat’s exhaust port. The problem with this setup is that the gas is still quite cold as it leaves the...
Looking for some advice regarding cryogenic modeling in ANSYS FEA software
I am looking for some advice regarding cryogenic modeling in ANSYS FEA software. I have been trying to use the Transient Thermal module, in workbench 14.5, to model the cooling of a device in a dilution fridge. I have approximate values for the cooling power of each plate in the...
Compensators and/or accumulators: Are they used in cryogenics?
Are compensators and/or accumulators, high or low pressure, used in cryogenics? Are they used in space?