Paper | Title | Other Keywords | Page |
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MOP024 | Low Energy Spread Beam Dynamics and RF Design of a Trapezoidal IH-RFQ | rfq, cavity, impedance, ion | 115 |
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Funding: Supported by NSFC (10775009) |
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MOP031 | Estimates of Energy Fluence at the Focal Plane in Beams Undergoing Neutralized Drift Compression | solenoid, target, induction, emittance | 133 |
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Funding: Work performed under the auspices of the U.S. Department of Energy under contract DE-AC52-07NA27344 at LLNL, and University of California contract DE-AC03-76SF00098 at LBNL. |
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TU204 | Design and Performance of L-Band and S-Band Multi-Beam Klystrons | cathode, cavity, klystron, gun | 369 |
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In the last couple of years, great achievements have been realized through world-wide developments of multi-beam klystrons (MBK) in the L-band and S-band. These MBKs are developed by industries such as Toshiba, Thales and CPI for the European X-FEL project or at the Naval Research Lab or by the Chinese Academy of Sciences for high-power, low-voltage radar systems. Some of them are already in operation at full specifications and are commercially available. The MBKs are superior to conventional single-beam klystrons through their ability to increase the output power dramatically while the operating voltage can be kept at a similar level. This talk will review the performances of these multi-beam klystrons, their design features, and future development plans. |
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TUP014 | Present Status of the BEPCII Linac | linac, injection, positron, electron | 419 |
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After the major upgrade in 2005, the BEPC injector linac has been commissioning and working smoothly for more than two years. A 2.1 GeV, 66 mA positron beam at the linac end has been obtained, and the highest injection rate into the ring of 80 mA/min. at 50 pps is reached, much higher than the design goal of 50 mA/min. The machine is working stable, the mal function was about 2% in the past two years, including the system test and the commissioning. |
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TUP019 | Injector of Intense Electron Beam | electron, simulation, cavity, emittance | 431 |
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The results of beam dynamic simulation in an S-band injector that can be used for creation of the powerful electron linac are presented in the report. The injector consists of a diode electron gun with beam current of up to 2 A at energy of electrons of 25 keV, the klystron type prebuncher and the three cavity buncher. In the buncher, due to the special choice of eigen frequencies of resonators, maximal amplitude of the field on the axis of resonators exponentially increase from the first (downstream of the beam) resonator to the last resonator. It allows effective bunching the intensive electron beam and accelerating it to relativistic velocities. For providing of low transversal beam emittance the injector is placed in the external magnetic field. The injector provides more than 1 A of beam current at particle energies of about 1 MeV. Attention is paid to research of transients and stability of injector work. |
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TUP047 | Manipulating the Two-Stream Instability for Efficient Terahertz Generation | electron, radiation, coupling, simulation | 504 |
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Particle beams have exhibited a two-stream instability for many decades; this undesirable trait has been well-understood for many years. We propose creating a scheme that uses a beam of electrons with two distinct energies that will develop the two-stream instability as a bunching mechanism. By controlling the beam parameters and seeding them with a low-level rf signal, a gain as high as 2.5 dB per centimeter is predicted. We show the theory behind this concept and recent progress in a developing experiment. |
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TUP107 | Longitudinal Beam Diagnostics for the ILC Injectors and Bunch Compressors | diagnostics, luminosity, wakefield, emittance | 655 |
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Funding: Work supported by US. Department of Energy, under Contract No. DE-FG02-06ER41435 with Northern Illinois University. |