| Paper |
Title |
Page |
| TUPLR072 |
Fabrication and Low Temperature Test Plan for Rare Isotope Science Project |
619 |
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- W.K. Kim, M.J. Joung, Y. Jung, H. Kim, J.-W. Kim, Y. Kim, I. Shin
IBS, Daejeon, Republic of Korea
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Quarter-wave resonator (QWR), half-wave resonator (HWR) and single-spoke resonator (SSR) cryomodules are used for RAON accelerator. The layout of RAON accelerator and three types of cryomodules such as QWR, HWR and SSR are shown in the linac. SRF test facility which consists of cryoplant, cleanroom, vertical test facility and horizontal test facility is constructed. Cleanroom has high pressure rinsing (HPR), ultrasonic cleaning (USC), buffered chemical polishing (BCP), high vacuum furnace and cavity assemble place. The test plan for cavity and cryomodules is presented.
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| DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-LINAC2016-TUPLR072
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| TUPLR073 |
Development of RAON QWR Cryomodule for Linac Demonstration |
622 |
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- H. Kim, J.W. Choi, Y.W. Jo, Y. Jung, W.K. Kim, Y. Kim, M. Lee
IBS, Daejeon, Republic of Korea
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Quarter-wave resonator (QWR) cryomodule is developed for linac demonstraction. The plan and layout of the linac demonstration are shown. 3D drawing and P&ID are shown for the quarter-wave resonator (QWR) cryomodule. The QWR cryomodule consists of cavity, coupler, tuner, liquid helium reservoir, thermal shield and magnetic shield. PLC rack is fabricated to control the QWR cryomodules. The PLC controls and monitors pumps, heaters, cryogenic valves, solenoid valves, gate valves and temperature sensors.
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| DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-LINAC2016-TUPLR073
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| TUP106004 |
Status of RRR Analysis for RAON Accelerator |
628 |
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- Y. Jung, H. Kim, W.K. Kim
IBS, Daejeon, Republic of Korea
- J. Lee, J. Seo
Vitzrotech Co., Ltd., Ansan City, Kyunggi-Do, Republic of Korea
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Residual resistance ratio (RRR) of 300-grade niobium has been analyzed to find optimal welding condition for a superconducting cavity. RRR values were not only measured along the welding directions, but also perpendicular to the welding lines. In this presentation, we will show the RRR analysis as a function of the distance, the welding speed, and the welding pressure.
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| DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-LINAC2016-TUP106004
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| THPLR069 |
Quality Factor Measurement Method Using Multi Decay Time Constants on Cavity |
1011 |
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- J.W. Kim, H. Kim
IBS, Daejeon, Republic of Korea
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Quality factor measurement method using multi decay time constants on superconducting cavity is suggested. In most cases of vertical test, one decay time constant is measured around critical coupling and coupling constants are measured using forward and reflected rf power to get intrinsic quality factor. We use multi decay time constants method to measure the quality factor, which uses three decay time constants. Two more switches before and after the cavity are added to the measurement system. Decay time constants are measured by switching off the rf power switch in front of rf source, the forward power switch in front of input power coupler, and then the pickup power switch behind the pickup coupler, respectively, at the same power of steady state.
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| DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-LINAC2016-THPLR069
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