Paper | Title | Other Keywords | Page |
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TUPO022 | Manufacturing of X-band Accelerating Structures: Metrology Analysis and Process Capability | controls, GUI, collider, linac | 374 |
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The fabrication tolerances of RF components are essential for CLIC X-band accelerating structures to perform efficiently. On one hand, the capability of high power accelerating structures depends on the shape accuracy and the asperity of the inner surfaces, when microwaves pass through the cavity. On the other hand, surface flatness and dimensional tolerances are necessary to guarantee a correct assembly process. Hence, the discs that build up the structure require sub-micrometre specifications and, in order to meet all the needs, ultra-precision machining using single crystal diamond tools is mandatory. This paper shows the analysis of the metrology results of the fabrication of 118 discs (4 accelerating structures). Dimensional and form tolerances are studied following the production order to find drifts in the production and to predict the impact on the assembly process. Finally, process capability is evaluated. | |||
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Poster TUPO022 [2.987 MB] | ||
DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2018-TUPO022 | ||
About • | paper received ※ 10 September 2018 paper accepted ※ 20 September 2018 issue date ※ 18 January 2019 | ||
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TUPO057 | Low-temperature Baking and Infusion Studies for High-gradient ILC SRF Cavities | cavity, SRF, collider, GUI | 466 |
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Low-temperature infusion has become a hot-topic in SRF researches recently. Past results show that low-temperature infusion can produce high quality factor at medium accelerating fields. Also, 75°C baking recently has been shown to improve accelerating gradients of SRF cavities. Hence these treatments are very promising for reducing cost of the ILC. In this work, we present latest results of low temperature infusion and baking, showing that these treatments can improve SRF cavities performance. | |||
DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2018-TUPO057 | ||
About • | paper received ※ 19 September 2018 paper accepted ※ 20 September 2018 issue date ※ 18 January 2019 | ||
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THPO003 | L-band Resonant Ring for Testing RF Windows for ILC | collider, simulation, coupling, klystron | 679 |
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A resonant ring is widely used for the breakdown test of RF components under high power. It can reach power gain of more than 10dB, which is limited by the attenua-tion of the ring. An L-band resonant ring is constructed for testing RF components of International Linear Collid-er (ILC) which is based on an RF frequency of 1.3GHz. The target of the high power test is 5 MW. We have fin-ished the test of an input power of 500 W using a solid state amplifier, and the principle of the resonant ring is verified. The resonant ring is tuned to an optimal condi-tion, which is preparation for high power operation. This paper details the principle, construction, and test of the L-band resonant ring. | |||
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Poster THPO003 [2.301 MB] | ||
DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2018-THPO003 | ||
About • | paper received ※ 13 September 2018 paper accepted ※ 21 September 2018 issue date ※ 18 January 2019 | ||
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THPO005 | High Aspect Ratio Beam Generation with the Phase-space Rotation Technique for Linear Colliders | emittance, gun, collider, simulation | 685 |
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Funding: This work is partly supported by Grant-in-Aid for Scientific Research (B) and US-Japan Science and Technology Cooperation Program in High Energy Physics. Linear colliders is the only way to realize e+ e− collision at higher energy beyond the limit of ring colliders by the huge synchrotron radiation energy loss. In the linear collider, the beam current should be much smaller comparing to the ring collider to save the required electricity. A way to realize an enough luminosity with the small beam current and less energy spread by Beamstrahlung, is collision in flat beam. This high aspect ratio beam can be made by phase-space rotation technique instead of the conventional way with DR (Damping Ring). We present a simulation of this technique and pilot experiments at KEK-STF and ANL WFA. |
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DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2018-THPO005 | ||
About • | paper received ※ 12 September 2018 paper accepted ※ 21 September 2018 issue date ※ 18 January 2019 | ||
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