MOOB06
LANL, Los Alamos, New Mexico, USA
TUOA01
ESRF, Grenoble, France
LANL, Los Alamos, New Mexico, USA
LANL, Los Alamos, New Mexico, USA
LA-UR-13-21289
| Paper | Title | Page |
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MOOB06 |
Summary of MRF Timing System Workshop | |
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| Summarizing the MRF Timing System Workshop, held Sunday, October 6th. | ||
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Slides MOOB06 [0.042 MB] | |
TUOA01 |
Mobile Platforms Roundtable | |
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| Roundtable panel discussion on the use of mobile devices in control systems. Topics include:- Are mobile devices really useful for controlling experimental equipment? - What are the pros and cons of using mobile devices for operator interfaces? - What are the pros and cons of each platform? - Are there applications for which mobile devices are better suited? - Are there applications for which mobile devices are not very well suited? - Native apps versus html5 - is there a clear advantage? - How to deploy apps - Which devices are most common tablets or phones? - Is supporting one platform enough? - What tools are people using to develop with? - What are the security concerns and how can they be mitigated? Panel moderators Andy Götz, European Synchrotron Radiation Facility, Grenoble, France Eric Björklund, Los Alamos Neutron Science Center, Los Alamos, New Mexico, USA Participating panelists Reinhard Bacher, Deutsches Elektronon-Synchrotron, Hamburg, Germany Kay-Uwe Kasemir, Spallation Neutron Source, Oak Ridge, Tennessee, USA Paolo Mutti, Institut Laue-Langevin, Grenoble, France, Scott Reisdorf, National Ignition Facility, Livermore, California, USA | ||
| THPPC112 | The LANSCE Timing Reference Generator | 1321 |
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The Los Alamos Neutron Science Center is an 800 MeV linear proton accelerator at Los Alamos National Laboratory. For optimum performance, power modulators must be tightly coupled to the phase of the power grid. Downstream at the neutron scattering center there is a competing requirement that rotating choppers follow the changing phase of neutron production in order to remove unwanted energy components from the beam. While their powerful motors are actively accelerated and decelerated to track accelerator timing, they cannot track instantaneous grid phase changes. A new timing reference generator has been designed to couple the accelerator to the power grid through a phase locked loop. This allows some slip between the phase of the grid and the accelerator so that the modulators stay within their timing margins, but the demands on the choppers are relaxed. This new timing reference generator is implemented in 64 bit floating point math in an FPGA. Operators in the control room have real-time network control over the AC zero crossing offset, maximum allowed drift, and slew rate - the parameter that determines how tightly the phase of the accelerator is coupled to the power grid.
LA-UR-13-21289 |
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