ORNL, Oak Ridge
*Spallation Neutron Source, ORNL and LANL
SLAC/ARDA, Menlo Park, California
SLAC/ARDB, Menlo Park, California
NSCL, East Lansing, Michigan
GSI, Darmstadt
| Paper | Title | Page |
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| FR201 | Accelerator Control and Global Networks - State of the Art | 847 |
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As accelerators increase in size and complexity, demands upon their control systems increase correspondingly. Machine complexity is reflected in complexity of control system hardware and software and careful configuration management is essential. Model-based procedures and fast feedback based upon even faster beam instrumentation are often required. Managing machine protection systems with tens of thousands of inputs is another significant challenge. Increased use of commodity hardware and software introduces new issues of security and control. Large new facilities will increasingly be built by national (e.g. SNS) or international (e.g. a linear collider) collaborations. Building an integrated control system for an accelerator whose development is geographically widespread presents particular problems, not all of them technical. Recent discussions of a “Global Accelerator Network” include the possibility of multiple remote control rooms and no more night shifts. Based upon current experience, observable trends and rampant speculation, this paper looks at the issues and solutions-–-some real, some probable, and some pie-in-the-sky.
*Spallation Neutron Source, ORNL and LANL |
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| FR202 | Status of High-Power Tests of Dual Mode SLED-II System for an X-Band Linear Collider | 852 |
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| We have produced 400 ns rf pulses of greater than 500 MW at 11.424 GHz with an rf system designed to demonstrate technology capable of powering a TeV scale electron-positron linear collider. Power is produced by four 50 MW X-band klystrons run off a common 400 kV solid-state modulator. We present the layout of our system, which includes a dual-moded transmission waveguide system and a dual-moded resonant-line (SLED-II) pulse compression system. Dual-moding of the transmission lines allows power to be directed through a pulse compression path or a bypass path; dual-moding in the pulse compressor allows the delay lines to be about half as long as they otherwise would need to be. We describe the design and performance of various components, including hybrids, directional couplers, power dividers, tapers, mode converters, and loads. These components are mostly overmoded to allow for greater power handling. We also present data on the processing and operation of this system. The power from that system is transported to feed a set accelerator structure. We will present the design and the high power testing data for the overmoded transfer line and the distribution network. | ||
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| FR203 | The Science of Radioactive Ion Beams | 857 |
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| The primary intellectual challenge of nuclear physics is to understand the nature of strongly interacting matter and how the features of nuclear many-body systems derive from the fundamental forces and properties of their constituent parts. In nuclear science, interestingly, atomic nuclei present one of the most difficult problems to address. However, a comprehensive understanding of nuclear properties is essential to our ability to model the chemical evolution of the Universe, use nuclei for tests of the fundamental symmetries of nature and assess any number of nuclear technologies. Until recently, the fact that experiments had to be carried out with the limited range of stable isotopes found in nature has severely constrained our understanding. However, the current and next generation of radioactive ion beam facilities will remove this constraint. This talk will endeavor to summarize the most important opportunities made available with the next generation of radioactive ion beam facilities. | ||
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| FR204 | The Physics Perspectives at the Future Accelerator Facility FAIR | 858 |
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| The physics perspective of the approved future international accelerator Facility for Anti-proton and Ion Research (FAIR) near Darmstadt, Germany will be outlined. The physics programme will comprise many body aspects of matter ranging from macroscopic system like highly correlated plasmas down to the properties of baryons and nuclear matter at high baryon densities. Through fragmentation of intense ion beams investigations with beams of short-lived radioactive nuclei far from stability will be possible. The addressed physics questions concern nuclear structure at the drip-lines, areas of astrophysics and nucleo-synthesis in supernovae and other stellar processes, as well as tests of fundamental symmetry. The structure of baryons and their limits of their existence is the interest of the two large experimental set-ups PANDA and CBM. Finally QED will be studied in extremely strong field effects and also the interaction of ions with matter. The future facility will feature a double-ring synchrotron SIS100/300 and a system of associated storage rings for beam collection, cooling, phase space optimisation and experimentation. | ||
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