Paper | Title | Other Keywords | Page |
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MOP010 | A Fast Chopper for the Fermilab High Intensity Neutrino Source (HINS) | linac, impedance, vacuum, simulation | 73 |
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A fast chopper capable of kicking single 2.5 MeV H- bunches, spaced at 325 MHz, at rates greater than 50 MHz is needed for the Fermilab High Intensity Neutrino Source (HINS). Four 1.2 kV fast pulsers, designed and manufactured by Kentech Instruments Ltd., will drive a ~0.5m long meander made from a copper plated ceramic composite. Test results showing pulses from the prototype 1.2 kV pulser propagating down the meander will be presented. |
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MOP014 | Status of the LANSCE Refurbishment Project | controls, klystron, linac, neutron | 85 |
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The Los Alamos Neutron Science Center (LANSCE) accelerator is an 800 MeV proton linac that drives user facilities for isotope production, proton radiography, ultra-cold neutrons, weapons neutron research and various sciences using neutron scattering. The LANSCE Refurbishment Project (LANSCE-R) is an ambitious project to refurbish key elements of the LANSCE accelerator that are becoming obsolete or nearing end-of-life. The conceptual design phase for the project is funded and underway. The 5 year, $170M (US) project will enable future decades of reliable, high-performance operation. It will replace a substantial fraction of the radio-frequency power systems (gridded tubes and klystrons) with modern systems, completely refurbish the original accelerator control and timing systems, replace obsolete diagnostic devices, and modernize other ancillary systems. An overview of the LANSCE-R project will be presented. The functional and operating requirements will be discussed, the proposed technical solutions presented, and the plan for successful project execution while meeting annual customer expectations for beam delivery will be reviewed. |
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TUP003 | Proposal for a 15 MeV Superconducting Electron Linac for the DEINOS Project | laser, linac, cavity, electron | 386 |
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The design of a 15 MeV, 2 kA peak current, electron accelerator for the DEINOS project is presented. It is dedicated to a new radiographic facility. The accelerator design is based on a dc photo-injector and a rf superconducting linac. Up to twenty electron micro-pulses, 100 ps time duration and 200 nC bench charge are emitted at 352 MHz repetition rate from a CS2Te photocathode and accelerated to 2.5 MeV in the dc diode before injection into a superconducting linac. A general description of the main accelerator components and the beam dynamics simulations are presented. |
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TUP058 | A Kicker Driver Exploiting Drift Step Recovery Diodes for the International Linear Collider | kicker, damping, instrumentation, linear-collider | 536 |
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Funding: U.S. Department of Energy SBIR Program |
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TUP066 | Commissioning of 10-MeV L-band Electron Linac for Industrial Applications | electron, klystron, linac, gun | 548 |
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Funding: This work is supported by KAPRA and POSTECH Physics BK21 Program. |
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THP017 | Use of Piezoelectric Actuator to Frequency Lock Superconducting Quarter Wave Resonator | controls, niobium, linac, resonance | 815 |
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The frequency control of the superconducting quarter wave resonator at IUAC is currently accomplished by mechanical and electronic tuners which are operated in the time scale of seconds and hundreds of milliseconds to a few tens of microseconds respectively. Due to presence of microphonics, input rf power in the range 200-300 W was required to control the resonator for a typical field of 3-5 MV/m achieved with 6 watts dissipation. Implementation of a novel idea to damp the mechanical vibration with the help of SS-balls has helped to reduce rf power below 100 W. Though resonators are working fine at this power level, we are investigating whether further reduction of rf power is possible using a piezo actuator to control the drift of frequency. The piezo tuner working in hundreds of milli seconds range with the dynamic phase control scheme will share a substantial load from the electronic tuner. As a result, the resonator's phase lock loop will remain locked for less rf power. The initial test results of the piezo tuner will be presented. |
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THP046 | Preliminary Design of the Slow Chopper for the SPIRAL 2 Project | power-supply, vacuum, pick-up, target | 891 |
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The SPIRAL2 LEBT line uses a single chopper situated in the line section common to protons, deuterons and A/Q=3 ions. The paper describes the design and the test of the power circuits, based on standard components and working up to 10 kV, at a 1 kHz repetition rate. |
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THP081 | Development of All Solid State Bouncer Compensated Long Pulse Modulators for LEP 1MW Klystrons to be Used for LINAC4 Project at CERN | klystron, linac, simulation, controls | 984 |
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Funding: Department of Atomic Energy, India. The work is done under DAE CERN Collaboration under NAT Protocol. |
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THP085 | Cooling System Design of Compact Klystron Modulator Power Supply in the XFEL Project at SPring-8 | klystron, power-supply, cathode, linac | 987 |
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A klystron modulator power supply for XFEL project at SPring-8 has been developed, which concepts are a compact body, a low noise, and a good stability. The cooling system of the power supply is one of the most important key for the stable modulator. For example, temperature change of insulation oil in the tank caused drift of the klystron voltage, and higher oil temperature deteriorates insulation oil and electric components. We adopted simple and compact cooling systems utilizing natural conviction cooling, because of low costs, limited space, and maintenance free. In order to estimate the requisite cooling ability, we designed four types of cooling panels and measured the natural conviction heat transfer coefficient between the oil and each cooling panels. Using the results, we designed cooling systems composed of water cooling panels placed on the side walls and a water pipe hanged from the ceiling panel. The temperature of the inner oil of the power supply in the rated operation was suppressed below 43 degree C, which is agreed with our expectation. In this paper we present the design and ability of the power supply, and the key point of oil cooling. |
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THP086 | Cold Cathode Electron Tube Toward Plenty Multi Beam Tube | cathode, cavity, electron, simulation | 990 |
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The multi beam electron tube with a lot of beam pipes is required for the low applied voltage and the high frequency because the efficiency has a limit according to the perveance. However, the total heater power becomes too high if many thermal cathodes are used. Thus the cold cathode such as the carbon nano tube (CNT) is suitable for such a multi beam electron tube. Further the cold cathode has the advantage to work as a switching device since the metal grid close to the cathode can be used. The design and the fundamental test of the partial model will be presented. |
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THP090 | Marx Bank Technology for Accelerators and Colliders | controls, collider, impedance, diagnostics | 1002 |
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Funding: U.S. Department of Energy SBIR Program |
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THP094 | Leveraging the LEDA High Voltage Power Supply Systems for the LANSCE Refurbishment Project | klystron, power-supply, controls, status | 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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THP095 | Progress Towards the LANSCE RF System Refurbishment | neutron, klystron, controls, low-level-rf | 1011 |
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The Los Alamos Neutron Science Center (LANSCE) is in the conceptual design phase of a refurbishment project that will sustain reliable facility operations well into the next decade. The LANSCE accelerator was constructed in the late 1960s and early 1970s and is a national user facility that provides pulsed protons and spallation neutrons for defense and civilian research and applications. The refurbishment will focus on systems that are approaching "end of life" and systems where modern upgrades hold the promise for significant operating cost savings. The current baseline consist of replacing all the 201 MHz rf amplifiers, replacing greater than 75% of the 805 MHz rf systems with a combination of high efficiency klystrons and new klystrons of the existing style, replacing four high voltage systems, and replacing all the low level rf cavity field control systems along the accelerator. System designs and requirements will be presented and the project plan will be discussed. |
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THP096 | Next Generation IGBT Switch Plate Development for the SNS High Voltage Converter Modulator | simulation, pulsed-power, plasma, diagnostics | 1012 |
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Funding: Work supported by the U.S. Department of Energy under contract DE-AC05-00OR22725 |
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THP097 | ILC Marx Modulator Development Program Status | controls, klystron, diagnostics, status | 1015 |
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Funding: Work supported by the U.S. Department of Energy under contract DE-AC02-76SF00515 |
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FR101 | 8-GeV C-Band Accelerator Construction for XFEL/SPring-8 | klystron, FEL, cavity, electron | 1090 |
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The 8 GeV C-band electron linear accelerator is under construction at the SPring-8 site aiming at generating an FEL X-ray beam in 2010. C-band accelerator technology has been developed initially at KEK for the e+e- linear collider project, and employed at the XFEL project in Japan. Since C-band generates a high gradient acceleration field as high as 35 MV/m, the total length of the accelerator fits within 400 m, including the injector and three bunch compressors. C-band uses normal conducting rf technology, thus it runs in pulse mode at 60 Hz, which is well suited to XFEL operation and is less expensive. The talk will cover the current status of the XFEL project and hardware production. |
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