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Current status of the CLIO project
CLIO (Cryogenic Laser Interferometer Observatory) is a Japanese gravitational wave detector project. One of the main purposes of CLIO is to demonstrate thermal-noise suppression by cooling mirrorsExpand
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EXPERIMENTAL COMPARISON AT KEK OF HIGH GRADIENT PERFORMANCE OF DIFFERENT SINGLE CELL SUPERCONDUCTING CAVITY DESIGNS
We have performed a series of vertical tests of three different designs of single cell Niobium superconducting cavities at 2 degrees Kelvin. These tests aimed at establishing that an acceleratingExpand
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High Gradient Performance of NLC/GLC X-Band Accelerating Structures
During the past five years, there has been an concerted program at SLAC and KEK to develop accelerator structures that meet the high gradient (65 MV/m) performance requirements for the Next LinearExpand
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RF Breakdown in Normal Conducting Single-Cell Structures
Operating accelerating gradient in normal conducting accelerating structures is often limited by rf breakdown. The limit depends on multiple parameters, including input rf power, rf circuit, cavityExpand
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COMPARISON OF HIGH GRADIENT PERFORMANCE IN VARYING CAVITY GEOMETRIES
Five types of CLIC prototype TW accelerator structures were high-gradient tested at KEK, up to 100 MV/m level. The ramping speed of each processing and the resultant breakdown rate were comparedExpand
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Geometric dependence of radio-frequency breakdown in normal conducting accelerating structures
We present the experimental results of a systematic study of rf breakdown phenomenon in high vacuum accelerator structures. In this study, the surface processing, geometry, and materials of theExpand
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In Situ Observations of Blistering of a Metal Irradiated with 2 MeV Protons
A vacuum-insulated tandem accelerator was used to observe in situ blistering during 2-MeV proton irradiation of metallic samples to a fluence of up to 6.7 × 1020 cm−2. Samples consisting of copper ofExpand
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Recent progress in R & D of advanced room temperature accelerator structures
The NLC and JLC groups face two major challenges in designing X-Band accelerator structures for an electron-positron linear collider. The first is to demonstrate stable, long-term operation at a 70Expand
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Results from the CLIC X-Band Structure Test Program at NLCTA *
As part of a SLAC-CERN-KEK collaboration on high gradient X-band structure research, several prototype structures for the CLIC linear collider study have been tested using two of the high power (300Expand
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Meeting Tight Frequency Requirement of Rounded Damped Detuned Structure
Following successful design and fabrication of damped detuned structures, the R and D for the accelerating structures of the NLC/JLC linear collider project proceeded to studies of Rounded DampedExpand
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