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An Overview Of The Planned Jefferson Lab 12 Gev Helium Refrigerator Upgrade
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Book Synopsis An Overview of the Planned Jefferson Lab 12-GeV Helium Refrigerator Upgrade by :
Download or read book An Overview of the Planned Jefferson Lab 12-GeV Helium Refrigerator Upgrade written by and published by . This book was released on 2008 with total page 14002 pages. Available in PDF, EPUB and Kindle. Book excerpt: In February 2006, Jefferson Laboratory in Newport News, VA, received â Critical Decision 1â (CD-1) approval to proceed with the engineering and design of the long anticipated upgrade to increase the beam energy of CEBAF, the Continuous Electron Beam Accelerator Facility, from 6 GeV to 12 GeV. This will require the installation of 10 new cryomodules, and additional 2.1-K refrigeration beyond the available 4600 W to handle the increased heat loads. Additionally, a new experimental hall, Hall D, is planned that will require the installation of a small, available refrigerator. This paper will present an overview of the integration of the new proposed refrigeration system into CEBAF, the installation of the available refrigerator for Hall D, and includes planned work scope, current schedule plans and project status.
Book Synopsis Commissioning and Operational Results of Helium Refrigeration System at JLab for the 12GeV Upgrade by :
Download or read book Commissioning and Operational Results of Helium Refrigeration System at JLab for the 12GeV Upgrade written by and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The new 4.5 K refrigerator system at the Jefferson Lab (JLab) Central Helium Liquefier (CHL-2) for the 12 GeV upgrade was commissioned in late spring of 2013, following the commissioning of the new compressor system, and has been supporting 12 GeV LINAC commissioning since that time. Six design modes were tested during commissioning, consisting of a maximum capacity, nominal capacity, maximum liquefaction, maximum refrigeration, maximum fill and a stand-by/reduced load condition. The maximum capacity was designed to support a 238 g/s, 30 K and 1.16 bar cold compressor return flow, a 15 g/s, 4.5 K liquefaction load and a 12.6 kW, 35-55 K shield load. The other modes were selected to ensure proper component sizing and selection to allow the cold box to operate over a wide range of conditions and capacities. The cold box system is comprised of two physically independent cold boxes with interconnecting transfer-lines. The outside (upper) 300-60 K vertical cold box has no turbines and incorporates a liquid nitrogen pre-cooler and 80-K beds. The inside (lower) 60-4.5 K horizontal cold box houses seven turbines that are configured in four expansion stages including one Joule-Thompson expander and a 20-K bed. The helium compression system has five compressors to support three pressure levels in the cold box. This paper will summarize the analysis of the test data obtained over the wide range of operating conditions and capacities which were tested.
Book Synopsis Overview and Status of the 12 GeV Cryogenic System Upgrade At Jlab by :
Download or read book Overview and Status of the 12 GeV Cryogenic System Upgrade At Jlab written by and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: As part of the planned Jefferson Laboratory's electron accelerator (CEBAF) power upgrade, ten additional superconducting RF cryomodules will be added to its accelerator linacs. Although physically the same size as each of the original 40 linac cryomodules, each new cryomodule will have approximately 4 times the acceleration power. To support the additional cryomodule heat loads generated, the existing 2K, 4600W Central Helium Liquefier (CHL) plant capacity will be doubled to a total of 9200W at 2K plus 24,000W at 35K for shield loads. The specified base line process cycle has been modeled after the laboratory s "Ganni Helium Cycle" process technology. In addition, a fourth physics experimental "Hall D" will be constructed which will have an additional stand alone 200W at 4K helium cryogenic plant. In October of 2008, Jefferson Laboratory (JLab) received approval for project "Critical Decision 3" construction phase status from the US Department of Energy.
Book Synopsis Advances in Cryogenic Engineering by : J. G. Weisend
Download or read book Advances in Cryogenic Engineering written by J. G. Weisend and published by American Institute of Physics. This book was released on 2008-04-17 with total page 952 pages. Available in PDF, EPUB and Kindle. Book excerpt: All papers have been peer-reviewed. This conference is the principal North American Conference on cryogenic engineering. It is attended by scientists and engineers from all over the world. The papers published here have been fully refereed and cover all aspects of cryogenic engineering including: refrigeration, superconductivity, cryocoolers, air liquefaction, heat and mass transfer, insulation systems, cryostat design and space cryogenics.
Book Synopsis Research Perspectives at Jefferson Lab with the 12 GeV Upgrade by :
Download or read book Research Perspectives at Jefferson Lab with the 12 GeV Upgrade written by and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The plans for upgrading the CEBAF accelerator at Jefferson Lab to 12 GeV are presented. The research program supporting that update are illustrated with a few selected examples. The instrumentation under design to carry out that research program is discussed.
Book Synopsis The JLAB Research Program with the 12 GeV Upgrade by :
Download or read book The JLAB Research Program with the 12 GeV Upgrade written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The plans for upgrading the CEBAF accelerator at Jefferson Lab to 12 GeV are presented. The research program supporting that upgrade are illustrated with a few selected examples. The instrumentation under design to carry out that research program is discussed.
Book Synopsis Research Perspectives at Jefferson Lab by : Kees de Jager
Download or read book Research Perspectives at Jefferson Lab written by Kees de Jager and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The plans for upgrading the CEBAF accelerator at Jefferson Lab to 12 GeV are presented. The research program supporting that upgrade is illustrated with a few selected examples. The instrumentation under design to carry out that research program is discussed.
Book Synopsis Refrigeration Recovery for Experiment Hall High Target Loads by :
Download or read book Refrigeration Recovery for Experiment Hall High Target Loads written by and published by . This book was released on 2010 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Qweak experiment at Jefferson Lab (JLab) is a 3000 W hydrogen target scheduled for the summer of 2010 and running for two years until the planned shut-down for 12GeV. The End Station Refrigerator (ESR) supports the three experiment halls, two of which may normally have a hydrogen target. The refrigerator for the ESR is a CTI/Helix 1500 W 4.5-K refrigerator nominally capable of supporting a 1250 W target load at 12 bar and 15-K (plus 1100 W of 4.5-K refrigeration). As such, this refrigerator is not capable of supporting the Qweak experiment target load in its present condition. Additionally, since the installation of an ambient air vaporizer for a single use, two week run duration of a high target load in the summer of 2003 there has been a consistent usage of the Central Helium Liquefier's (CHL's) 3 bar 4.5-K helium, supplied via an existing transfer-line to the ESR, for other high target loads. By the fall of 2004, it was apparent that this continued use of CHL's supercritical helium was routinely being sought by the hall experimenters. As such, a method of refrigeration recovery was proposed to reduce the support required of CHL for these high target loads, including the anticipated Qweak experiment, while utilizing the recovered CHL refrigeration from the target to increase ESR's 12 bar 15-K capacity.
Book Synopsis Advances in Cryogenic Engineering by : Quan-Sheng Shu
Download or read book Advances in Cryogenic Engineering written by Quan-Sheng Shu and published by Springer. This book was released on 2013-12-19 with total page 967 pages. Available in PDF, EPUB and Kindle. Book excerpt: In recent years, the technology of cryogenic comminution has been widely applied in the field of chemical engineering, food making, medicine production, and particularly in recycling of waste materials. Because of the increasing pollution of waste tires and the shortage of raw rubber resource, the recycling process for waste rubber products has become important and commercially viable. This technology has shown a great number of advantages such as causing no environmental pollution, requiring low energy consumption and producing high quality products. Hence, the normal crusher which was used to reclaim materials, such as waste tires, nylon, plastic and many polymer materials at atmospheric 12 temperature is being replaced by a cryogenic crusher. • In the cryogenic crusher, the property of the milled material is usually very sensitive to temperature change. When a crusher is in operation, it will generate a great deal of heat that causes the material temperature increased. Once the temperature increases over the vitrification temperature, the material property will change and lose the brittle behavior causing the energy consumption to rise sharply. Consequently, the comminution process cannot be continued. Therefore, it is believed that the cryogenic crusher is the most critical component in the cryogenic comminution system. The research on the temperature increase and energy consumption in the cryogenic crusher is not only to reduce the energy consumption of the crasher, but also to reduce the energy consumption of the cryogenic system.
Book Synopsis Overview and Lessons Learned of the Jefferson Lab Cryomodule Production for the CEBAF 12 GeV Upgrade by :
Download or read book Overview and Lessons Learned of the Jefferson Lab Cryomodule Production for the CEBAF 12 GeV Upgrade written by and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The Continuous Electron Beam Accelerator Facility (CEBAF) at Jefferson Lab is nearing completion of an energy upgrade from 6 to 12 GeV. An integral part of the upgrade is the addition of ten new cryomodules, each consisting of eight seven-cell superconducting radio-frequency (SRF) cavities. An average performance of 100+MV of acceleration per cryomodule is needed to achieve the 12 GeV beam energy goal. The production methodology was for industry to provide and deliver the major components to Jefferson Lab, where they were tested and assembled into cryomodules. The production process begins with an inspection upon receiving of all major components followed by individual performance qualification testing. The SRF cavities received their final chemical processing and cleaning at Jefferson Lab. The qualified components along with all associated hardware and instrumentation are assembled, tested, installed into CEBAF and run through an integrated system checkout in preparation for beam operations. The production process is complete and one of the first completed cryomodules has successfully produced 108 MV of acceleration with a linac beam current of 465?A.
Book Synopsis The Science Driving the 12 GeV Upgrade of CEBAF. by : Thomas Jefferson National Accelerator Facility (U.S.)
Download or read book The Science Driving the 12 GeV Upgrade of CEBAF. written by Thomas Jefferson National Accelerator Facility (U.S.) and published by . This book was released on 2000 with total page 271 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Jefferson Lab at Higher Energies by :
Download or read book Jefferson Lab at Higher Energies written by and published by . This book was released on 1998 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Prospects for energy upgrades of the CEBAF accelerator at Jefferson Laboratory are reviewed. The plans begin with the evolutionary upgrade of the maximum energy to 6 GeV, which is already in progress. This would be followed by a construction project to provide energies up to 12 GeV in a remarkably cost-effective manner. A further doubling of the beam energy to 24 GeV is also feasible. The physics that motivates the increase to 12 GeV is reviewed briefly. Then the features of the existing accelerator are outlined with particular emphasis on characteristics of the installed components and the tunnel that impact on possible energy upgrades. Next, the broad approach to increasing the beam energy to 12 GeV, preserving the 100% duty factor and 1 MW beam power of the present accelerator, is outlined. Issues associated with the parallel evolution of the capability of the experimental equipment are reviewed and a ''straw man'' solution is presented to stimulate discussion. Finally, prospects for a future 24 GeV upgrade are presented briefly.
Book Synopsis Encyclopedia of Nuclear Physics and its Applications by : Reinhard Stock
Download or read book Encyclopedia of Nuclear Physics and its Applications written by Reinhard Stock and published by John Wiley & Sons. This book was released on 2013-09-13 with total page 810 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book fills the need for a coherent work combining carefully reviewed articles into a comprehensive overview accessible to research groups and lecturers. Next to fundamental physics, contributions on topical medical and material science issues are included.
Book Synopsis Jefferson Lab CEBAF Energy Upgrade Plans by : Claus H. Rode
Download or read book Jefferson Lab CEBAF Energy Upgrade Plans written by Claus H. Rode and published by . This book was released on 1999 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Pressure Safety of JLAB 12GeV Upgrade Cryomodule by :
Download or read book Pressure Safety of JLAB 12GeV Upgrade Cryomodule written by and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper reviews pressure safety considerations, per the US Department of Energy (DOE) 10CFR851 Final Rule [1], which are being implemented during construction of the 100 Megavolt Cryomodule (C100 CM) for Jefferson Lab's 12 GeV Upgrade Project. The C100 CM contains several essential subsystems that require pressure safety measures: piping in the supply and return end cans, piping in the thermal shield and the helium headers, the helium vessel assembly which includes high RRR niobium cavities, the end cans, and the vacuum vessel. Due to the vessel sizes and pressure ranges, applicable national consensus code rules are applied. When national consensus codes are not applicable, equivalent design and fabrication approaches are identified and implemented. Considerations for design, material qualification, fabrication, inspection and examination are summarized. In addition, JLAB's methodologies for implementation of the 10 CFR 851 requirements are described.
Book Synopsis Upgrading the CEBAF Accelerator to 12 GeV. by : Leigh Harwood
Download or read book Upgrading the CEBAF Accelerator to 12 GeV. written by Leigh Harwood and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Jefferson Lab is preparing to upgrade its 6 GeV Continuous Electron Beam Accelerator Facility (CEBAF) to 12 GeV. The doubled energy will significantly extend research reach of the three existing experimental Halls A, B and C, and the upgrade will add scientific capability, with a newly constructed hall, Hall D. Areas of special initial interest are reactions at high xBjorken, GPD's and exotic hybrid mesons. The present linacs will have their acceleration roughly doubled through the addition of 10 new cryomodules which will perform at {approx}5 times the original specification for CEBAF. The cryogenics plant will be roughly doubled and new rf systems will be installed for the new cryomodules. The beam transport system will strongly leverage existing hardware but must be enhanced with new power supplies, one new recirculation arc, and a beamline to the new Hall D.A brief description of the scope for the various accelerator subsystems will be given as well as the status of the project as a whole.
Download or read book DOE this Month written by and published by . This book was released on 1987 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt:
