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Download or read book An Experimental Study Using Helium to Produce a Catastrophic Loss of Vacuum in a RHIC Dipole Magnet Cryostat written by and published by . This book was released on 1993 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Helium Pressures in RHIC Vacuum Cryostats and Relief Valve Requirements from Magnet Cooling Line Failure written by and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A catastrophic failure of the RHIC magnet cooling lines, similar to the LHC superconducting bus failure incident, would pressurize the insulating vacuum in the magnet and transfer line cryostats. Insufficient relief valves on the cryostats could cause a structural failure. A SINDA/FLUINT{reg_sign} model, which simulated the 4.5K/4 atm helium flowing through the magnet cooling system distribution lines, then through a line break into the vacuum cryostat and discharging via the reliefs into the RHIC tunnel, had been developed to calculate the helium pressure inside the cryostat. Arc flash energy deposition and heat load from the ambient temperature cryostat surfaces were included in the simulations. Three typical areas: the sextant arc, the Triplet/DX/D0 magnets, and the injection area, had been analyzed. Existing relief valve sizes were reviewed to make sure that the maximum stresses, caused by the calculated maximum pressures inside the cryostats, did not exceed the allowable stresses, based on the ASME Code B31.3 and ANSYS results. The conclusions are as follows: (1) The S/F simulation results show that the highest internal pressure in the cryostats, due to the magnet line failure, is ≈37 psig (255115 Pa); (2) Based on the simulation, the temperature on the cryostat chamber, INJ Q8-Q9, could drop to 228 K, which is lower than the material minimum design temperature allowed by the Code; (3) Based on the ASME Code and ANSYS results, the reliefs on all the cryostats inside the RHIC tunnel are adequate to protect the vacuum chambers when the magnet cooling lines fail; and (4) In addition to the pressure loading, the thermal deformations, due to the temperature decrease on the cryostat chambers, could also cause a high stress on the chamber, if not properly supported.
Author : National Aeronautics and Space Adm Nasa
Publisher : Independently Published
ISBN 13 : 9781794002159
Total Pages : 34 pages
Book Rating : 4.0/5 (21 download)
Download or read book Simplified Methodology to Estimate the Maximum Liquid Helium (Lhe) Cryostat Pressure from a Vacuum Jacket Failure written by National Aeronautics and Space Adm Nasa and published by Independently Published. This book was released on 2019-01-13 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt: The aircraft-based Stratospheric Observatory for Infrared Astronomy (SOFIA) is a platform for multiple infrared astronomical observation experiments. These experiments carry sensors cooled to liquid helium temperatures. The liquid helium supply is contained in large (i.e., 10 liters or more) vacuum-insulated dewars. Should the dewar vacuum insulation fail, the inrushing air will condense and freeze on the dewar wall, resulting in a large heat flux on the dewar's contents. The heat flux results in a rise in pressure and the actuation of the dewar pressure relief system. A previous NASA Engineering and Safety Center (NESC) assessment provided recommendations for the wall heat flux that would be expected from a loss of vacuum and detailed an appropriate method to use in calculating the maximum pressure that would occur in a loss of vacuum event. This method involved building a detailed supercritical helium compressible flow thermal/fluid model of the vent stack and exercising the model over the appropriate range of parameters. The experimenters designing science instruments for SOFIA are not experts in compressible supercritical flows and do not generally have access to the thermal/fluid modeling packages that are required to build detailed models of the vent stacks. Therefore, the SOFIA Program engaged the NESC to develop a simplified methodology to estimate the maximum pressure in a liquid helium dewar after the loss of vacuum insulation. The method would allow the university-based science instrument development teams to conservatively determine the cryostat's vent neck sizing during preliminary design of new SOFIA Science Instruments. This report details the development of the simplified method, the method itself, and the limits of its applicability. The simplified methodology provides an estimate of the dewar pressure after a loss of vacuum insulation that can be used for the initial design of the liquid helium dewar vent stacks. However, since it is not an exact t
Author :
Publisher :
ISBN 13 :
Total Pages : 70 pages
Book Rating : 4.:/5 (317 download)
Download or read book Design of a Horizonal Liquid Helium Cryostat for Refrigerating a Flying Superconducting Magnet in a Wind Tunnel written by and published by . This book was released on 1982 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Nathaniel M. Garceau
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (135 download)
Download or read book Heat and Mass Transfer During a Sudden Loss of Vacuum in a Liquid Helium Cooled Tube written by Nathaniel M. Garceau and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: There are many safety concerns with cryogenic systems around the world such as particle accelerators. One large concern is the sudden loss of vacuum within the particle accelerator systems. Loss of vacuum can lead to catastrophic equipment and facility damage as well as possible personnel injury. To mitigate risk and improve safety during operation of particle accelerator systems, a clear understanding of the dynamic and complex heat and mass transfer processes after a vacuum break is needed. Research in our lab focuses on the simulation of a sudden loss of vacuum in liquid helium cooled superconducting particle accelerator beam-line tubes. Loss of vacuum is simulated using an evacuated copper tube cooled in liquid helium and suddenly venting nitrogen gas from a buffer tank into the tube. Abrupt temperature rise by thermometers mounted to the tube's wall marked the location of the gas propagating front. Previous experiments and analysis in our lab using normal helium (He~I) and preliminary studies in superfluid helium (He II) observed an exponential slowing of the gas propagating front (Dhuley and Vansciver, 2016). Condensation of the nitrogen gas onto the tube walls was shown to be the reason for the exponential slowing, but the underlying analysis and explanation of the gas dynamics and condensation was limited. This dissertation describes the continuation and evolution of our lab's experiments, and improvements in the quantitative analysis to better explain the underlying physical mechanisms of the slowing down process in both He I and He II. Further systematic experimental and simulation work using different mass flow rates into the evacuated tube were conducted to determine the applicability and robustness of the model in both He I and He II. The improved understanding of the physics of a vacuum break in a liquid helium cooled tube could have practical uses by improving particle accelerator safety.
Author : Sam Stuart
Publisher : Elsevier
ISBN 13 : 1483280195
Total Pages : 559 pages
Book Rating : 4.4/5 (832 download)
Download or read book Liquid Helium Technology written by Sam Stuart and published by Elsevier. This book was released on 2014-12-03 with total page 559 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pure and Applied Cryogenics, Volume 6: Liquid Helium Technology focuses on the principles, techniques, methodologies, and approaches involved in liquid helium technology. The selection examines liquid helium technology at the National Bureau of Standards, properties of liquid helium, heat transfer to liquid helium, and noise associated with heat transfer to liquid helium II. Discussions focus on apparatus and instrumentation, test procedure, liquid helium as a cryogenic liquid, zero viscosity, momentum of heat flow, rotation and vortex lines, oscillation of vortex lines, and quantized vortices. The publication then takes a look at boiling heat transfer to liquid helium, heat transfer from metal to supercritical helium, heat transfer to boiling liquid helium in narrow vertical channels, and critical nucleate boiling of liquid helium in a simulated wire wound magnet. The text ponders on microdegree temperature controller for liquid helium II bath, commercial production, storage and distribution of liquid helium, lightweight liquid helium dewar, commercial handling of liquid helium dewars, effectiveness of low temperature refrigeration for electronics, and a bulk liquid helium distribution system. The selection is a valuable source of information for scientists and researchers interested in liquid helium technology.
Author : Alan Owens
Publisher :
ISBN 13 :
Total Pages : 38 pages
Book Rating : 4.:/5 (39 download)
Download or read book The Use of Liquid Helium to Produce High Vacuum written by Alan Owens and published by . This book was released on 1953 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Carolin Zoller
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (14 download)
Download or read book Experimental Investigation and Modelling of Incidents in Liquid Helium Cryostats written by Carolin Zoller and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Konrad Martin Eisele
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (222 download)
Download or read book An Experimental Study of Dissipative Mechanisms in Liquid Helium written by Konrad Martin Eisele and published by . This book was released on 1958 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : W. Lance Richards
Publisher :
ISBN 13 :
Total Pages : 28 pages
Book Rating : 4.:/5 (944 download)
Download or read book Simplified Methodology to Estimate the Maximum Liquid Helium (LHe) Cryostat Pressure from a Vacuum Jacket Failure written by W. Lance Richards and published by . This book was released on 2015 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 8 pages
Book Rating : 4.:/5 (16 download)
Download or read book Results from Sudden Catastrophic Loss of Vacuum on Scaled Superconducting Radio Frequency Cryomodule Experiment written by and published by . This book was released on 2013 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Experimental Study of Helium-3 Photodisintegration written by and published by . This book was released on 1963 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Yau Ting Wong
Publisher :
ISBN 13 :
Total Pages : 177 pages
Book Rating : 4.:/5 (642 download)
Download or read book An Experimental Study of Convective Flow in Liquid Helium Using Thermal Data and Flow Pattern Images written by Yau Ting Wong and published by . This book was released on 2000 with total page 177 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Ugo Amaldi
Publisher : Springer
ISBN 13 : 9783642230523
Total Pages : 0 pages
Book Rating : 4.2/5 (35 download)
Download or read book Elementary Particles - Accelerators and Colliders written by Ugo Amaldi and published by Springer. This book was released on 2013-03-27 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: After a historical consideration of the types and evolution of accelerators the physics of particle beams is provided in detail. Topics dealt with comprise linear and nonlinear beam dynamics, collective phenomena in beams, and interactions of beams with the surroundings. The design and principles of synchrotrons, circular and linear colliders, and of linear accelerators are discussed next. Also technological aspects of accelerators (magnets, RF cavities, cryogenics, power supply, vacuum, beam instrumentation, injection and extraction) are reviewed, as well as accelerator operation (parameter control, beam feedback system, orbit correction, luminosity optimization). After introducing the largest accelerators and colliders of their times the application of accelerators and storage rings in industry, medicine, basic science, and energy research is discussed, including also synchrotron radiation sources and spallation sources. Finally, cosmic accelerators and an outlook for the future are given.
Author : Lyndon R. Evans
Publisher : EPFL Press
ISBN 13 : 9782940222346
Total Pages : 264 pages
Book Rating : 4.2/5 (223 download)
Download or read book The Large Hadron Collider written by Lyndon R. Evans and published by EPFL Press. This book was released on 2009-01-01 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt: Describes the technology and engineering of the Large Hadron collider (LHC), one of the greatest scientific marvels of this young 21st century. This book traces the feat of its construction, written by the head scientists involved, placed into the context of the scientific goals and principles.
Author : G.. Apollinari
Publisher :
ISBN 13 : 9789290834700
Total Pages : 516 pages
Book Rating : 4.8/5 (347 download)
Download or read book High-Luminosity Large Hadron Collider ( HL-LHC ) written by G.. Apollinari and published by . This book was released on 2017 with total page 516 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Lyndon Evans
Publisher :
ISBN 13 : 9782889152827
Total Pages : 305 pages
Book Rating : 4.1/5 (528 download)
Download or read book The Large Hadron Collider written by Lyndon Evans and published by . This book was released on 2018 with total page 305 pages. Available in PDF, EPUB and Kindle. Book excerpt:
