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MOP113 | The Dual Axis Radiographic Hydrodynamic Test (DARHT) Facility Personnel Safety System (PSS) Control System | controls, radiation, interlocks, monitoring | 340 |
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Funding: This work supported by the US National Nuclear Security Agency and the US Department of Energy under contract DE-AC52-06NA25396 |
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TUP056 | Beam Optics Studies and Commissioning Status of CTF3 | linac, optics, quadrupole, closed-orbit | 530 |
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The objective of the CLIC Test Facility CTF3 is to demonstrate the feasibility issues of the CLIC two-beam technology. CTF3 consists of an electron linac followed by a delay loop, a combiner ring and a two-beam test area. One issue studied in CTF3 is the efficient generation of a very high current drive beam, used in CLIC as the power source to accelerate the main beam to multi-TeV energies. The beam current is first doubled in the delay loop and then multiplied by a factor four in the combiner ring by interleaving bunches using transverse deflecting rf cavities. The combiner ring and the connecting transfer line have been put into operation in 2007. In this paper we give the status of the commissioning, present the results of the combination tests and illustrate in some detail the beam optics measurements, including response matrix analysis, dispersion measurement and applied orbit correction algorithms. We discuss as well the observation of a vertical beam break-up instability which is due to the vertical transverse mode in the horizontal rf deflectors used for beam injection and combination. We outline the attempted methods to mitigate the instability and their effectiveness. |
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WE203 | Fermilab's Project X | 714 | |
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The present status and plans for Fermilab's Project X will be reviewed. |
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THP028 | Status of 3.9 GHz Superconducting RF Cavity Technology at Fermilab | cavity, HOM, alignment, cryomodule | 845 |
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Funding: Operated by Fermi Research Alliance, LLC under Contract No. DE-AC02-07CH11359 with the United States Department of Energy. |
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THP029 | Performance of 3.9-GHZ Superconducting Cavities | cavity, HOM, superconductivity, SRF | 848 |
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Funding: Operated by Fermi Research Alliance, LLC under Contract No. DE-AC02-07CH11359 with the United States Department of Energy. |
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THP053 | The Status of Nextef; The X-band Test Facility in KEK | klystron, linear-collider, collider, controls | 906 |
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Nextef is a new X-band (11.4GHz) test facility in KEK. All of the key devices of this facility are from our old X-band Test Facility(XTF). By combining the power from two klystrons, 100 MW maximum X-band rf power is produced and 75MW is available in the bunker where the high power test of the high gradient accelerator structures will be done. The commissioning of the facility for the structure testing has almost done. The status of the facilityis is reported. |
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THP055 | Characteristics of Different Materials on High-Gradient Experiments | laser, controls, acceleration, klystron | 912 |
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High-gradient experiments have been performed using a narrow waveguide that has a field of approximately 200 MV/m at an rf power of 100 MW. The study investigates the characteristics of different materials at high-gradient rf breakdown. This paper reports the results of high-gradient experiments and observations of the surface of stainless-steel waveguides. |
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THP063 | A New Local Field Quantity Describing the High Gradient Limit of Accelerating Structures | accelerating-gradient, vacuum, site, linac | 936 |
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A new local field quantity which gives the high gradient performance limit of accelerating structures in the presence of vacuum rf breakdown is presented. A model of the breakdown trigger based on the pulsed heating of a potential breakdown site by the field emission currents and driven by a new field quantity, a modified Poynting vector, has been derived. The field quantity Sc takes into account both active and reactive power flow on the surface. This new quantity has been evaluated for many X-band and 30 GHz rf tests, both travelling wave and standing wave, and the value of Sc achieved in the experiments agrees well with analytical estimates. |
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THP094 | Leveraging the LEDA High Voltage Power Supply Systems for the LANSCE Refurbishment Project | klystron, power-supply, high-voltage, controls | 1008 |
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Funding: Work supported by the NNSA, U. S. Department of Energy under contract DE-AC52-06NA25396. |
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THP097 | ILC Marx Modulator Development Program Status | controls, klystron, diagnostics, high-voltage | 1015 |
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Funding: Work supported by the U.S. Department of Energy under contract DE-AC02-76SF00515 |