CUSTOM CRYOGENIC TECHNOLOGY ARTICLES
Test Cryostat System built by Meyer for Argonne National Lab presented at 14th International Conference on RF Superconductivity 2009 in Berlin.
Multilayer insulation systems are a common and highly effective means of reducing thermal radiation heat leak in cryogenic systems.
Discussion of some of the techniques used when installing multilayer insulation on low volume custom and semi-custom cryogenic equipment.
An analysis of the use of multilayer insulation blankets on 77K surfaces and 4K surfaces and the interaction between the blankets.
The high strength and relatively low thermal conductivity of Kevlar make it an interesting choice for thermal supports in cryogenic vessels.
A cost study for fabrication of the Cryomodules and RF Power Systems for the ILC presents the methodology and important assumptions of the study.
Multilayer insulation is able to achieve effective isolation from radiated heat due to its structure. Each successive layer reduces heat load on the next.
The Pressure Equipment Directive sets mandatory requirements for pressure vessels in EU countries. For manufacturers, certification is far from automatic.
In cryogenic applications thermal shields are used to intercept ambient temperature radiation, “shielding" the inner cryogen vessel from this heat load.
Bayonets are a practical way to make demountable connections vacuum insulated pipe & make it possible to break connections in a system without contamination
Comparison of devices measure temperatures in cryogenics, including resistance thermometers utilizing carbon or platinum resistors, diodes & thermocouples.
Discussion of theory of thermal conductivity of metals, nonmetals & plastics at extremely low temperatures & how this relates to cryogenic equipment manufacturing.
We present some design guides for heat shields, showing a heat shield with cooling coils and diagramming peak temperature rise for various materials.
When fabricating dewars & support structures for superconducting magnets it is important to understand the magnetic properties of the materials used.
A discussion of the causes of thermoacoustic oscillations and the procedures available to prevent them from occurring.
When fabricating cryogenic equipment, liquid nitrogen cold shocking followed by sequential pressure & helium leak tests is a key quality assurance step.
In experience at Meyer Tool cryogenic aluminum/stainless steel bimetallic joints are most commonly produced through explosion bonding or friction welding.
Meyer Tool is manufacturing six Cryogenic Control reservoirs (CCRs) for the Thomas Jefferson National Accelerator Facility.
Demountable cryogenic seals of Conflat, Indium wire, Helicoflex, Kapton or Mylar gaskets, VCR fittings, & glass conical vacuum seals are all viable options.
This paper examines heat shield design options over a range of conditions and compare the costs of different materials and design options.
For an ATLAS upgrade, Meyer is providing helium pressure vessels for the superconducting niobium cavities & fabricating major components of the cryomodule.
How to properly install multilayer insulation to create a highly effective thermal insulation system, and the pitfalls of improper installation.
Case study of fabricating the MINERvA detector cryostat including tracing the origin of an elusive helium leak discovered in final testing.
Methods to prevent galling on surfaces or at fasteners including advantages & disadvantages of antiseise compound and the use of silver or bronze fasteners.
The proper use of silicon bronze nuts with stainless steel bolts to avoid galling & methods to prevent contamination of the vacuum chamber.
A discussion of G-10CR & G-11CR, which have been specifically developed to address the issue of uniform material properties at cryogenic temperatures.
Analysis of thermal shrouds in cryogenic applications, advantages of construction using copper, aluminum, & stainless steel, materials cost comparison.
Case Study of the six Cryogenic Control Reservoirs (CCRs) Meyer Tool manufactured for the Thomas Jefferson National Accelerator Facility (Jefferson Lab).
Discussion of the use of vapor cooled thermal shields and their performance vs. a liquid nitrogen cooled shield to achieve very long holding times.
Providing an adequate relief path to deal with the sudden or catastrophic loss of isolation vacuum is a critical step in designing a dewar.
A discussion of technologies used to convert natural gas into Liquified Natural Gas (LNG).
Many common materials become superconducting at low temperatures. Why should this have unexpected consequences?
Meyer Tool & Mfg., Inc. utilizes various manufacturing techniques to mate parts together during fabrication of the many unique projects built here. For parts that need the ability to be removed, threaded connections are typically used. Permanent connections can be achieved by welding (when joining similar metals) or brazing (when joining dissimilar metals). When these methods are unavailable or undesired, interference fits can be a reliable style of mating parts together.
The root passes of austenitic stainless steel GTAW welds are routinely purged with inert gas. By far the most common inert gas utilized for this is argon
Meyer Tool is manufacturing 3 key components of the Proton Improvement Plan–II project for Argonne National Lab and Fermilab, the first 2K cryomodule for superconducting accelerator cavities with low-beta.