Investigation of Niobium Surface Roughness and Hydrogen Content with Different Polishing Conditions for Performance Recovery of Superconducting QWRs in JAEA Tokai-Tandem Accelerator
The effect of the different polishing conditions for niobium has been investigated as the basic data for polishing the superconducting quarter-wave resonators (QWRs) in the booster linac of the Tokai-tandem accelerator. Surface roughness and desorbed hydrogen amount of niobium samples with different...
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| Veröffentlicht in: | E-journal of surface science and nanotechnology 2023/05/18, Vol.21(4), pp.344-349 |
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| creator | Kamiya, Junichiro Nii, Keisuke Kabumoto, Hiroshi Kondo, Yasuhiro Tamura, Jun Harada, Hiroyuki Matsui, Yutaka Matsuda, Makoto Moriya, Katsuhiro Ida, Yoshiaki Ueda, Hideki |
| description | The effect of the different polishing conditions for niobium has been investigated as the basic data for polishing the superconducting quarter-wave resonators (QWRs) in the booster linac of the Tokai-tandem accelerator. Surface roughness and desorbed hydrogen amount of niobium samples with different polishing conditions such as polishing method (electropolishing: EP or chemical polishing: CP), polishing thickness, and electrode location, have been measured. For the hydrogen amount measurement, thermal desorption spectroscopy has been performed. The electrode arrangement in the EP to avoid hydrogen bubbles hitting the niobium surface is found to be important to obtain a smooth surface and less hydrogen content. The large polishing thickness resulted in a large amount of hydrogen content in the niobium or large surface roughness in the case of both EP and CP. The EP without hitting the hydrogen bubbles and with appropriate polished thickness will be the best solution for the actual polishing of the QWRs. |
| doi_str_mv | 10.1380/ejssnt.2023-046 |
| format | Article |
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Surface roughness and desorbed hydrogen amount of niobium samples with different polishing conditions such as polishing method (electropolishing: EP or chemical polishing: CP), polishing thickness, and electrode location, have been measured. For the hydrogen amount measurement, thermal desorption spectroscopy has been performed. The electrode arrangement in the EP to avoid hydrogen bubbles hitting the niobium surface is found to be important to obtain a smooth surface and less hydrogen content. The large polishing thickness resulted in a large amount of hydrogen content in the niobium or large surface roughness in the case of both EP and CP. The EP without hitting the hydrogen bubbles and with appropriate polished thickness will be the best solution for the actual polishing of the QWRs.</description><identifier>ISSN: 1348-0391</identifier><identifier>EISSN: 1348-0391</identifier><identifier>DOI: 10.1380/ejssnt.2023-046</identifier><language>eng</language><publisher>Tokyo: The Japan Society of Vacuum and Surface Science</publisher><subject>Bubbles ; Chemical polishing ; Electrodes ; Electropolishing ; Hydrogen ; Hydrogen desorption ; Linear accelerators ; Niobium ; Superconductivity ; Surface roughness ; Thermal desorption spectroscopy ; Thickness</subject><ispartof>e-Journal of Surface Science and Nanotechnology, 2023/05/18, Vol.21(4), pp.344-349</ispartof><rights>2023 The author(s)</rights><rights>2023. This work is published under https://creativecommons.org/licenses/by/4.0/ (the “License”). 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Surf. Sci. Nanotechnol.</addtitle><description>The effect of the different polishing conditions for niobium has been investigated as the basic data for polishing the superconducting quarter-wave resonators (QWRs) in the booster linac of the Tokai-tandem accelerator. Surface roughness and desorbed hydrogen amount of niobium samples with different polishing conditions such as polishing method (electropolishing: EP or chemical polishing: CP), polishing thickness, and electrode location, have been measured. For the hydrogen amount measurement, thermal desorption spectroscopy has been performed. The electrode arrangement in the EP to avoid hydrogen bubbles hitting the niobium surface is found to be important to obtain a smooth surface and less hydrogen content. The large polishing thickness resulted in a large amount of hydrogen content in the niobium or large surface roughness in the case of both EP and CP. The EP without hitting the hydrogen bubbles and with appropriate polished thickness will be the best solution for the actual polishing of the QWRs.</description><subject>Bubbles</subject><subject>Chemical polishing</subject><subject>Electrodes</subject><subject>Electropolishing</subject><subject>Hydrogen</subject><subject>Hydrogen desorption</subject><subject>Linear accelerators</subject><subject>Niobium</subject><subject>Superconductivity</subject><subject>Surface roughness</subject><subject>Thermal desorption spectroscopy</subject><subject>Thickness</subject><issn>1348-0391</issn><issn>1348-0391</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2023</creationdate><recordtype>article</recordtype><recordid>eNpNkc1uEzEUhUcIJEpgzdYS62n9NzPxMgqBFlWltEEsLY99PXFI7GB7ivJgvF_HCkRsfG35O-dI91TVe4IvCZvjK9im5PMlxZTVmLcvqgvC-LzGTJCX_91fV29S2mLMOta1F9WfG_8EKbtBZRc8ChbdudC7cY8ex2iVBvQQxmHjISWkvEHXRxPDAB4tg8_gM_rt8gZ9dNZCLM_7sHNp4_xQAOOKaUI2RHQPcRp75Ysl6PAE8VjiHscDRD2xo85F9u3HQ0LOoy-L1QKtw0_l6vUUDHu00Bp2EFUO8W31yqpdgnd_56z6_mm1Xl7Xt18_3ywXt7Vmguba2s6YeaNo17eNMEJQIwg3vO87IIIK02GgfWsb3fCGaN3ytldciL7pjeJszmbVh5PvIYZf47QnuQ1j9FOkpIK2rGVlj7Pq6kTpGFKKYOUhur2KR0mwLN3IUzeydCOnbibF6qTYpqwGOPMqZqd3cOaJ5OX4pzv_642KEjx7BtIkoHE</recordid><startdate>20230518</startdate><enddate>20230518</enddate><creator>Kamiya, Junichiro</creator><creator>Nii, Keisuke</creator><creator>Kabumoto, Hiroshi</creator><creator>Kondo, Yasuhiro</creator><creator>Tamura, Jun</creator><creator>Harada, Hiroyuki</creator><creator>Matsui, Yutaka</creator><creator>Matsuda, Makoto</creator><creator>Moriya, Katsuhiro</creator><creator>Ida, Yoshiaki</creator><creator>Ueda, Hideki</creator><general>The Japan Society of Vacuum and Surface Science</general><general>Japan Science and Technology Agency</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>7U5</scope><scope>8FD</scope><scope>JG9</scope><scope>L7M</scope></search><sort><creationdate>20230518</creationdate><title>Investigation of Niobium Surface Roughness and Hydrogen Content with Different Polishing Conditions for Performance Recovery of Superconducting QWRs in JAEA Tokai-Tandem Accelerator</title><author>Kamiya, Junichiro ; Nii, Keisuke ; Kabumoto, Hiroshi ; Kondo, Yasuhiro ; Tamura, Jun ; Harada, Hiroyuki ; Matsui, Yutaka ; Matsuda, Makoto ; Moriya, Katsuhiro ; Ida, Yoshiaki ; Ueda, Hideki</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c392t-ff7dd85a27b659d992d914d4bb7e1929d70e2b6f5c5451cc646ba499b5bda4383</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2023</creationdate><topic>Bubbles</topic><topic>Chemical polishing</topic><topic>Electrodes</topic><topic>Electropolishing</topic><topic>Hydrogen</topic><topic>Hydrogen desorption</topic><topic>Linear accelerators</topic><topic>Niobium</topic><topic>Superconductivity</topic><topic>Surface roughness</topic><topic>Thermal desorption spectroscopy</topic><topic>Thickness</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Kamiya, Junichiro</creatorcontrib><creatorcontrib>Nii, Keisuke</creatorcontrib><creatorcontrib>Kabumoto, Hiroshi</creatorcontrib><creatorcontrib>Kondo, Yasuhiro</creatorcontrib><creatorcontrib>Tamura, Jun</creatorcontrib><creatorcontrib>Harada, Hiroyuki</creatorcontrib><creatorcontrib>Matsui, Yutaka</creatorcontrib><creatorcontrib>Matsuda, Makoto</creatorcontrib><creatorcontrib>Moriya, Katsuhiro</creatorcontrib><creatorcontrib>Ida, Yoshiaki</creatorcontrib><creatorcontrib>Ueda, Hideki</creatorcontrib><collection>CrossRef</collection><collection>Engineered Materials Abstracts</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>E-journal of surface science and nanotechnology</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Kamiya, Junichiro</au><au>Nii, Keisuke</au><au>Kabumoto, Hiroshi</au><au>Kondo, Yasuhiro</au><au>Tamura, Jun</au><au>Harada, Hiroyuki</au><au>Matsui, Yutaka</au><au>Matsuda, Makoto</au><au>Moriya, Katsuhiro</au><au>Ida, Yoshiaki</au><au>Ueda, Hideki</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Investigation of Niobium Surface Roughness and Hydrogen Content with Different Polishing Conditions for Performance Recovery of Superconducting QWRs in JAEA Tokai-Tandem Accelerator</atitle><jtitle>E-journal of surface science and nanotechnology</jtitle><addtitle>e-J. Surf. Sci. Nanotechnol.</addtitle><date>2023-05-18</date><risdate>2023</risdate><volume>21</volume><issue>4</issue><spage>344</spage><epage>349</epage><pages>344-349</pages><artnum>2023-046</artnum><issn>1348-0391</issn><eissn>1348-0391</eissn><abstract>The effect of the different polishing conditions for niobium has been investigated as the basic data for polishing the superconducting quarter-wave resonators (QWRs) in the booster linac of the Tokai-tandem accelerator. Surface roughness and desorbed hydrogen amount of niobium samples with different polishing conditions such as polishing method (electropolishing: EP or chemical polishing: CP), polishing thickness, and electrode location, have been measured. For the hydrogen amount measurement, thermal desorption spectroscopy has been performed. The electrode arrangement in the EP to avoid hydrogen bubbles hitting the niobium surface is found to be important to obtain a smooth surface and less hydrogen content. 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| source | J-STAGE (Free - Japanese); Full-Text Journals in Chemistry (Open access); Directory of Open Access Journals; EZB Electronic Journals Library |
| subjects | Bubbles Chemical polishing Electrodes Electropolishing Hydrogen Hydrogen desorption Linear accelerators Niobium Superconductivity Surface roughness Thermal desorption spectroscopy Thickness |
| title | Investigation of Niobium Surface Roughness and Hydrogen Content with Different Polishing Conditions for Performance Recovery of Superconducting QWRs in JAEA Tokai-Tandem Accelerator |
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