Showing 1-25 of 1,784 resultsfor "Index Terms":Los Alamos National Laboratory
"Index Terms":Los Alamos National Laboratory
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The changing role of national laboratories in the US is examined. The goal is for the federal laboratories to provide a source of ideas for industry. Past efforts, begun in the 1980s, to revamp the laboratories have moved slowly or mired completely, and it expected that a significant number of them, many in the Department of Defense, may disappear within the next few years, having outlived their m...Show More
Wide-Area Gigabit Networking: Los Alamos HIPPI-SONET Gateway
Supercomputing '95:Proceedings of the 1995 ACM/IEEE Conference on Supercomputing
Year: 1995 | Conference Paper |
Cited by: Papers (1)
This paper describes a HIPPI-SONET Gateway which has been designed by members of the Computer Network Engineering Group at Los Alamos National Laboratory. The Gateway has been used in the CASA Gigabit Testbed at Caltech, Los Alamos National Laboratory, and the San Diego Supercomputer Center to provide communications between the sites. This paper will also make some qualitative statements as to les...Show More
The National Ignition Facility and the National Ignition Campaign
The National Ignition Facility (NIF), the world's largest and most powerful laser system for inertial confinement fusion (ICF) and experiments studying high-energy-density (HED) science, is now operational at Lawrence Livermore National Laboratory (LLNL). NIF construction was certified by the Department of Energy as complete on March 27, 2009. NIF, a 192-beam Nd:glass laser facility, will ultimate...Show More
Impact of cavity RF field phase and amplitude control uncertainties on the SNS linac
Proceedings of the 2003 Particle Accelerator Conference
Year: 2003 | Conference Paper |
Cited by: Papers (1)
There is an accuracy limit of LLRF control over cavity rf phase and amplitude. This limited accuracy of control gives rise to beam energy and phase jitter, emittance growth, and beam loss. In the case of the SNS linac, there are a few limiting factors such as minimizing injection foil miss, acceptable ring injection painting, and beam loss in the linac which are related with the LLRF control error...Show More
The high-speed channel (HSC) standard
Digest of Papers. COMPCON Spring 89. Thirty-Fourth IEEE Computer Society International Conference: Intellectual Leverage
Year: 1989 | Conference Paper |
The high-speed channel (HSC) is a simple high-performance, point-to-point channel for transmitting digital data at peak data rates of 800 or 1600 Mb/s. The transmission distance between data-processing equipment using copper cabling can be up to 25 m. A distance-independent protocol allows the average data rate to approach the peak data rate. This is a benefit for future, fiber-optic version of th...Show More
What's new with FASTBUS and what's it done in the particle accelerator laboratories
L. Costrell;W.K. Dawson;P.J. Ponting;E.D. Platner;L. Paffrath;E.J. Barsotti;R.W. Downing;H. Ikeda;R.O. Nelson;I. Kolpakov;D.B. Gustavson;H.V. Walz
Conference Record of the 1991 IEEE Nuclear Science Symposium and Medical Imaging Conference
Year: 1991 | Conference Paper |
Implementations of FASTBUS have been made in accelerator laboratories worldwide, resulting in clarifications, modifications and extensions of the specifications. Of tremendous benefit to users have been FASTBUS Standard Routines. The availability of such standard software is unique for high-speed bus systems and resulted from the involvement of hardware and software specialists in all aspects of t...Show More
The Spallation neutron source accelerator low level RF control system
M. Champion;M. Crofford;H. Ma;M. Piller;A. Ratti;L. Doolittle;M. Monroy;S. De Santis;H. Shoaee;K. Kasemir;S. Kwon;J. Power;M. Prokop;A. Regan;M. Stettler;D. Thomson
Proceedings of the 2003 Particle Accelerator Conference
Year: 2003 | Conference Paper |
Cited by: Papers (7)
The Spallation Neutron Source low level RF team includes members from Lawrence Berkeley, Los Alamos, and Oak Ridge national laboratories. The team is responsible for the development, fabrication and commissioning of 98 low level RF (LLRF) control systems for maintaining RF amplitude and phase control in the front end (FE), linac and high energy beam transport (HEBT) sections of the SNS accelerator...Show More
Application programming structure and physics applications
C.M. Chu;J. Galambos;W.-D. Klotz;T. Pelaia;A. Shishlo;C.K. Allen;C. McChesney;N. Pattengale;D. Ottavio
Proceedings of the 2003 Particle Accelerator Conference
Year: 2003 | Conference Paper |
Cited by: Papers (3)
The Spallation Neutron Source (SNS) is using a Java based hierarchal framework for application program development. The framework is designed to provide an accelerator physics programming interface to the accelerator, called XAL. Much of the underlying interface to the EPICS control system is hidden from the user. Use of this framework allows writing of general-purpose applications that can be app...Show More
The Design and Performance of the Integrated Spallation Neutron Source Vacuum Control System
Proceedings of the 2005 Particle Accelerator Conference
Year: 2005 | Conference Paper |
Cited by: Papers (2)
The Spallation Neutron Source (SNS) vacuum control systems have been developed within a collaboration of Lawrence Berkeley National Laboratory (LBNL), Los Alamos National Laboratory (LANL), Thomas Jefferson National Accelerator Facility (TJNAF), and Brookhaven National Laboratory (BNL). Each participating lab is responsible for a different section of the machine: LBNL for the Front-End section, LA...Show More
Complex Interacting Infrastructure Systems
2007 40th Annual Hawaii International Conference on System Sciences (HICSS'07)
Year: 2007 | Conference Paper |
Cited by: Papers (1)
The infrastructures on which our society depends not only can have failures propagating within the infrastructure but also between infrastructures. For example, Cleveland lost its water supply during the August 2003 blackout of the Northeastern USA and the loss of the twin towers in New York in September 2001 impacted both subway transport and communications. Multiple dependent and cascading failu...Show More
A System for Managing External Directives
Conference Record on Crossing Frontiers.
Year: 1992 | Conference Paper |
First Page of the Article
Show MoreThe application of the perfluorocarbon liquid/plastic film capacitor technology to repetitive discharge pulse power systems
Conference on Electrical Insulation & Dielectric Phenomena - Annual Report 1982
Year: 1982 | Conference Paper |
Cited by: Papers (2)
A joint program has been initiated between the Los Alamos National Laboratory and the Sandia National Laboratories to evaluate and refine the Sandia perfluorocarbon/plastic film capacitor technology for application in repetitively operated, pulse discharge, energy storage service. The goal of this effort is continuous operation to 100 Hz with lifetimes approaching 108-109 charge-discharge cycles a...Show More
Several approaches to visualizing simulated data are described. It is noted that a centralized video animation facility represents the state of the art in scientific visualization, but is too expensive to replicate widely. Methods used at LANL for connecting supercomputers with display units, ranging from dumb terminals to powerful workstations, are also described. Of particular interest is the Sc...Show More
The Los Alamos 600 MJ, 1500 MW Inertial Energy Storage And Pulsed Power Unit
Eighth IEEE International Conference on Pulsed Power
Year: 1991 | Conference Paper |
Cited by: Papers (2)
A 1430 MVA synchronous generator from a cancelled nuclear power plant has been installed and commissioned at Los Alamos National Laboratory (LANL) to be used as the pulsed power generator for physics experiments. The generator is mounted on a spring foundation to prevent dynamic forces from being transmitted to the substructure and into the ground. 
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First Page of the Article
Show MoreHardcopy to online publication-it can be done
International Conference on Professional Communication,Communication Across the Sea: North American and European Practices
Year: 1990 | Conference Paper |
Cited by: Patents (5)
The actual process of converting a monthly technical journal from a printed hardcopy publication to an online information source is analyzed. In publishing the hardcopy version, there were problems of high printing costs and late distribution. It was also found that readers were keeping stacks of back issues for reference. The online information source is easy to access, contains current informati...Show More
Zero-degree injection line for PILAC, the proposed Los Alamos Pion Linac
Conference Record of the 1991 IEEE Particle Accelerator Conference
Year: 1991 | Conference Paper |
An optimized injection line for PILAC, the proposed Los Alamos Pion Linac, is presented. With the other optimized components (pion source, accelerator, and high-resolution beamline and spectrometer), the system is capable of delivering 10/sup 9/ 920 MeV pions per second to the target. Issues concerning the linear transport are touched upon, but the emphasis is on the tuning process for the nonline...Show More
Cavity shape and beam dynamics design for a linac for pions
Conference Record of the 1991 IEEE Particle Accelerator Conference
Year: 1991 | Conference Paper |
A linac to accelerate pions from 400 to 920 MeV kinetic energy is being designed as an upgrade to the LAMPF accelerator facility at Los Alamos, New Mexico. Calculations for the design of the superconducting cavity shape attempt to reduce the peak surface field needed to achieve a given accelerating gradient, yet ensure sufficient cell-to-cell coupling to maintain field stability when microphonics ...Show More
Opportunities for accelerating commercial development via effective partnering
COMPCON Spring '91 Digest of Papers
Year: 1991 | Conference Paper |
Since 1980, by a series of laws and executive orders, the resources in federal laboratories have been made increasingly available to private industry via technology transfer efforts in support of the National Competitiveness Objectives. The author explains how these resources can be accessed, with particular emphasis on Los Alamos National Laboratory.<>
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First Page of the Article
Show MoreOpportunities for accelerating commercial development via effective partnering
Year: 1991 | Conference Paper |
The Dual Axis Radiographic Hydrotest Facility [DARHT] at Los Alamos will use two induction linacs to produce high-energy electron beams. The electron beams will be used to generate X-rays from bremsstrahlung targets. The X-rays will be used to produce radiographs. The first accelerator is operational now, producing a 60-nanosecond electron beam. The second accelerator is under construction. It wil...Show More
Testing of the SNS Superconducting Cavities and Cryomodules
Proceedings of the 2005 Particle Accelerator Conference
Year: 2005 | Conference Paper |
Cited by: Papers (3)
The superconducting linac for the Spallation Neutron Source is in the process of being commissioned. Eightyone niobium cavities resonating at 805 MHz are being installed in the SNS tunnel in 11 medium beta (. 61) cryomodules each containing 3 cavities and 12 high beta (. 81) cryomodules each with 4 cavities. The niobium cavities and cryomodules were designed and assembled at Jefferson Lab to opera...Show More
Adaptive Feed Forward Beam-Loading Compensation Experience at the Spallation Neutron Source Linac
Proceedings of the 2005 Particle Accelerator Conference
Year: 2005 | Conference Paper |
Cited by: Papers (2)
When initial beam studies at the Spallation Neutron Source (SNS) indicated a need for better compensation of the effects of beam-loading, a succession of rapid-prototyping and experimentation lead to the development of a simple yet successful adaptive feed forward (AFF) technique within a few weeks. We describe the process and first results.Show More
Progress on the SNS ring LLRF control system
K. Smith;M. Blaskiewicz;J.M. Brennan;J. DeLong;F. Heisterinann;A. Zaltsman
Proceedings of the 2003 Particle Accelerator Conference
Year: 2003 | Conference Paper |
Cited by: Papers (2)
4.2 K Operation of the SNS Cryomodules
I.E. Campisi;S. Assadi;F. Casagrande;M. Champion;P. Chu;S. Cousineau;M. Crofford;C. Deibele;J.D. Galambos;P. Gurd;D. Hatfield;M. Howell;D. Jeon;Y.W. Kang;K. Kasemir;Z. Kursun;H. Ma;M. Piller;D. Stout;W. Strong;A. Vassioutchenko;Y. Zhang
Proceedings of the 2005 Particle Accelerator Conference
Year: 2005 | Conference Paper |
Cited by: Papers (2)
The Spallation Neutron Source being built at Oak Ridge National Laboratory employs eighty one 805 MHz superconducting cavities operated at 2.1 K to accelerate the H-beam from 187 MeV to about 1 GeV. The superconducting cavities and cryomodules with two different values of beta (. 61 and .81) have been designed and constructed at Jefferson Lab for operation at 2.1 K with unloaded Q’s in excess of 5...Show More
4.2 K Operation of the SNS Cryomodules
I.E. Campisi;S. Assadi;F. Casagrande;M. Champion;P. Chu;S. Cousineau;M. Crofford;C. Deibele;J.D. Galambos;P. Gurd;D. Hatfield;M. Howell;D. Jeon;Y.W. Kang;K. Kasemir;Z. Kursun;H. Ma;M. Piller;D. Stout;W. Strong;A. Vassioutchenko;Y. Zhang
Year: 2005 | Conference Paper |
Transverse Beam Matching Application for SNS
Proceedings of the 2005 Particle Accelerator Conference
Year: 2005 | Conference Paper |
Cited by: Papers (1)
An automated transverse beam matching application has been developed for the Spallation Neutron Source (SNS) beam transport lines. The application is written within the XAL Java framework and the matching algorithm is based on the simplex optimization method. Other functionalities, such as emittance calculated from profile monitor measurements (adopted from a LANL Fortran code), profile monitor di...Show More
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