WorldCat Identities

Thomas Jefferson National Accelerator Facility (U.S.)

Overview
Works: 3,959 works in 4,645 publications in 1 language and 14,281 library holdings
Genres: Conference proceedings  Periodicals 
Roles: Researcher
Classifications: QC793.5.B32, 539
Publication Timeline
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Publications about Thomas Jefferson National Accelerator Facility (U.S.) Publications about Thomas Jefferson National Accelerator Facility (U.S.)
Publications by Thomas Jefferson National Accelerator Facility (U.S.) Publications by Thomas Jefferson National Accelerator Facility (U.S.)
Most widely held works about Thomas Jefferson National Accelerator Facility (U.S.)
 
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Most widely held works by Thomas Jefferson National Accelerator Facility (U.S.)
OnTarget ( )
in English and held by 152 WorldCat member libraries worldwide
N* physics and nonperturbative quantum chromodynamics : proceedings of the joint ECT*/JLAB workshop, Trento, Italy, May 18-29, 1998 by S Simula ( Book )
2 editions published in 1999 in English and held by 90 WorldCat member libraries worldwide
The workshop was devoted to a summary of recent experimental and theoretical research on N* physics. Special emphasis was given to the information that photo- and electro-production of nucleon resonances can provide on the non-perturbative regime of quantum chromodynamics. Discussions among experimentalists and theoreticians were stimulated in order to pursue the interpretation of the huge amount of forthcoming data from several laboratories in the world. This volume contains both the invited lectures and the contributions. On the main topics, like single and double pion production, pi- and K-meson production, the GDH sum rule, and the spin of the proton
Single crystal-large grain niobium technology : International Niobium Workshop, Araxá, Brazil, 30 October-1 November 2006 by International Niobium Workshop ( Book )
2 editions published in 2007 in English and held by 80 WorldCat member libraries worldwide
International Symposium on the Superconducting Science & Technology of Ingot Niobium Jefferson Laboratory, Newport News, VA, USA, 22-24 September 2010 by International Symposium on the Superconducting Science & Technology of Ingot Niobium ( )
2 editions published in 2011 in English and held by 61 WorldCat member libraries worldwide
Strong interactions at low and intermediate energies : proceedings of the 13th Annual HUGS at CEBAF, Jefferson Laboratory, USA, 26 May-12 June 1998 by HUGS at CEBAF ( Book )
1 edition published in 2000 in English and held by 55 WorldCat member libraries worldwide
Exclusive and semi-exclusive processes at high momentum transfer : Newport News, VA, USA, May 19-22, 1999 ( Book )
2 editions published in 2000 in English and held by 49 WorldCat member libraries worldwide
Exclusive processes at high momentum transfer : May 15-18, 2002, Jefferson Lab, Newport News, Virginia by Workshop on Exclusive Processes at High Momentum Transfer ( Book )
5 editions published in 2002 in English and held by 48 WorldCat member libraries worldwide
This book focuses on the physics of exclusive processes at high momentum transfer and their description in terms of generalized parton distributions, perturbative QCD, and relativistic quark models. It covers recent developments in the field, both theoretical and experimental
Achievements and new directions in subatomic physics : festschrift in honour of Tony Thomas' 60th birthday : Adelaide, Australia, 15-19 February 2010 ( Book )
1 edition published in 2010 in English and held by 33 WorldCat member libraries worldwide
"Readership: Researchers, academics and graduate students in nuclear physics and high-energy physics. The workshop reviewed recent results and new directions for nuclear and hadron physics, focusing on topics such as pion-nucleon interactions and chiral symmetry, partons and deep inelastic scattering, lattice QCD, physics beyond the Standard Model, and complex systems such as econophysics."--Provided by publisher
Analytical theory of intensity fluctuations in SASE ( )
7 editions published between 1996 and 1997 in English and held by 22 WorldCat member libraries worldwide
Accelerators of sufficient energy and particle fluence can produce radioactivity as an unwanted byproduct. The radioactivity is typically imbedded in structural materials but may also be removable from surfaces. Many of these radionuclides decay by positron emission or electron capture; they often have long half lives and produce photons of low energy and yield making detection by standard devices difficult. The contamination control limit used throughout the US nuclear industry and the Department of Energy is 1,000 disintegrations per minute. This limit is based on the detection threshold of pancake type Geiger-Mueller probes for radionuclides of relatively high radiotoxicity, such as cobalt-60. Several radionuclides of concern at a high energy electron accelerator are compared in terms of radiotoxicity with radionuclides commonly found in the nuclear industry. Based on this comparison, a count-rate based contamination control limit and associated measurement strategy is proposed which provides adequate detection of contamination at accelerators without an increase in risk
The Relativistic Heavy Ion Collider control system ( )
4 editions published in 1997 in English and held by 16 WorldCat member libraries worldwide
The Experimental Physics and Industrial Control System (EPICS) uses a broadcast method to locate resources and controls distributed across control servers. There are many advantages offered by using a centrally managed name resolution method, in which resources are located using a repository. The suitability of DCE Directory Service as a name resolution method is explored, and results from a study involving DCE are discussed. An alternative nameserver method developed and in use at the Thomas Jefferson national Accelerator Facility (Jefferson Lab) is described and results of integrating this new method with existing EPICS utilities presented. The various methods discussed in the paper are compared
Nucleon Structure and hyperon form factors from lattice QCD ( )
3 editions published in 2007 in English and held by 12 WorldCat member libraries worldwide
There is a measure of debate within the nuclear community concerning the relevance of quark degrees of freedom in understanding nuclear structure. We briefly outline some of the key issues and review the impressive progress made recently within the framework of the quark-meson coupling model. In particular, we explain in quite general terms how the modification of the internal structure of hadrons in-medium leads naturally to three- and four-body forces, or equivalently to density dependent effective interactions
Influence of Ta content in high purity niobium on cavity performance preliminary results ( )
2 editions published in 2004 in English and held by 10 WorldCat member libraries worldwide
We discuss the experimental program to search for baryon states with exotic flavor quantum numbers using CLAS at Jefferson Lab
Variation of Mechanical Properties of High RRR And Reactor Grade Niobium With Heat Treatments ( )
2 editions published in 2003 in English and held by 10 WorldCat member libraries worldwide
Superconducting rf cavities used as accelerating structures in particle accelerators are made from high purity niobium with residual resistance ratios greater than 250. Reactor grade niobium is also used to make wave-guide and/or end group components for these accelerating structures. The major impurities in this type of niobium are interstitially dissolved gases such as hydrogen, nitrogen, and oxygen in addition to carbon. After fabricating the niobium accelerating structures, they are subjected to heat treatments for several hours in vacuum at temperatures of up to 900 C for degassing hydrogen or up to 1400 C for improving the thermal conductivity of niobium considerably. These heat treatments are affecting the mechanical properties of niobium drastically. In this paper the variation of the mechanical properties of high purity and reactor grade niobium with heat treatments in a vacuum of (almost equal to) 10⁻⁶ Torr and temperatures from 600 C to 1250 C for periods of 10 to 6 hours are presented. High purity niobium starts exhibiting upper and lower yield stress points while reactor grade niobium, on the other hand, stops exhibiting this characteristic BCC material behavior of upper and lower yield stress points after heat treatment at 1250 C in the presence of Ti as a solid state getter material
Fabrication and Testing of the SRF cavities for the CEBAF 12 GeV Upgrade Prototype Cryomodule Renascence ( )
2 editions published in 2005 in English and held by 10 WorldCat member libraries worldwide
Twelve seven-cell niobium cavities for the CEBAF 12 GeV upgrade prototype cryomodule Renascence have been fabricated at JLab and tested individually. This set includes four of the ''Low Loss'' (LL) design and eight of the ''High Gradient'' (HG) design. The fabrication strategy was an efficient mix of batch job-shop component machining and in-house EBW, chemistry, and final-step machining to meet mechanical tolerances. Process highlights will be presented. The cavities have been tested at 2.07 K, the intended CEBAF operating temperature. Performance exceeded the tentative design requirement of 19.2 MV/m CW with less than 29 W dynamic heat dissipation. These results, as well as the HOM damping performance are presented
Hadron spectrum with domain-wall valence quarks on an improved staggered sea ( )
4 editions published in 2006 in English and held by 10 WorldCat member libraries worldwide
The hadron spectrum is computed in full QCD using domain-wall valence fermions on an improved staggered sea, for pion masses down to around $350{approx}(/rm MeV)$. Emphasis is laid on the low-lying baryon spectrum. All possible baryon correlators obtainable from local and quasi-local quark sources are computed, using lattice group-theory methods Results are presented for the lowest-lying states in each isospin channel
MACHINE PROTECTION FOR HIGH AVERAGE CURRENT LINACS ( )
2 editions published in 2003 in English and held by 10 WorldCat member libraries worldwide
Well-controlled optical transport over long range is important for many types of nuclear and high energy physics experiments. It is essential in achieving the desired beam parameters, minimizing optical sensitivity, and ensuring acceptable helicity correlated orbit differences for parity-type experiments. A precise and rigorous program for evaluating optical matching errors, and a deterministic algorithm for obtaining global matching solutions thus hold considerable promise for both accelerator design and operation, although the latter has defied attempts so far due to its almost intractable complexity. For the CEBAF accelerator at Jefferson Lab, this difficulty is further exacerbated by the extreme matching condition necessary for a 5 pass recirculating linac, elements that can introduce considerable optical error, and loss of long-range difference orbit orthogonality due to these effects, all of which impose a very tight demand on the accuracy of the measured transfer matrix as input to the matching algorithm. Research in methods for both measuring and matching optical transport has led to recent successful demonstration of deterministic matching of the optical transport of CEBAF. The global nature of the matching algorithm allows efficient exploration of solutions not easily accessible by traditional methods and serves to signal configuration flaws in the machine
Recent Results from JLab on Nucleon Responses ( )
2 editions published between 2003 and 2004 in English and held by 10 WorldCat member libraries worldwide
Highlights of recent data from Jefferson Lab on the nucleon response to an electro-magnetic probe are presented. Recent technological advances in polarized beams and either polarized targets or nucleon recoil polarimeters have yielded a significant improvement on the precision of the data. An outlook is presented of planned experiments
Physical Nucleon Form Factors from Lattice QCD ( )
3 editions published between 1999 and 2005 in English and held by 10 WorldCat member libraries worldwide
We explore the possibility of extrapolating state of the art lattice QCD calculations of nucleon form factors to the physical regime. We find that the lattice results can be reproduced using the Light Front Cloudy Bag Model and the Extended Gari-Krmpelmann Model by letting their parameters be analytic functions of the quark mass. We then use the models to extend the lattice calculations to large values of Q{sup 2} of interest to current and planned experiments. These functions for the first model are also used to define extrapolations to the physical value of the pion mass, thereby allowing us to study how the predicted zero in G{sub E}(Q{sup 2})/G{sub M}(Q{sup 2}) varies as a function of quark mass
Effective Field Theory and Isospin Violation in Few-Nucleon Systems ( )
2 editions published in 2004 in English and held by 10 WorldCat member libraries worldwide
I discuss the leading and subleading isospin--breaking three--nucleon forces in the chiral effective field theory framework. I have discussed the leading and subleading isospin-violating 3NFs. The leading contributions are generated by one- and two-pion exchange diagrams with their strength given by the strong neutron-proton mass difference. The subleading corrections are again given by one- and two-pion exchange diagrams, driven largely by the charged-to-neutral pion mass difference and also by the electromagnetic neutron-proton mass difference and the dimension two electromagnetic LEC f₁. In the future, these isospin-breaking forces should be used to analyze few-nucleon systems based on chiral EFT
Research Perspectives at Jefferson Lab ( )
4 editions published in 2005 in English and held by 10 WorldCat member libraries worldwide
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
 
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Alternative Names

controlled identity Continuous Electron Beam Accelerator Facility

Jefferson Lab
Jefferson Lab Newport News, Va
Jefferson Lab (U.S.)
Jefferson Laboratory
Jefferson Laboratory Newport News, Va
Jefferson Laboratory (U.S.)
Jefferson National Accelerator Facility
Jefferson National Accelerator Facility Newport News, Va
Jefferson National Accelerator Facility (U.S.)
JLab
JLAB (Thomas Jefferson National Accelerator Facility : U.S.)
TJNAF
United States Thomas Jefferson National Accelerator Facility
Languages
English (77)
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