Beam coupling impedance of the main extraction kickers in the CERN PS
In view of the High Luminosity (HL) upgrade of the LHC, the beam intensity must be doubled in the injector chain. To perform reliable beam dynamics simulations, the beam coupling impedance in the injectors, such as the Proton Synchrotron (PS), must be followed closely by including all contributing e...
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| Veröffentlicht in: | Journal of instrumentation 2024-08, Vol.19 (8), p.T08001 |
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| container_title | Journal of instrumentation |
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| creator | Neroni, M. Barnes, M.J. Lasheen, A. Mostacci, A. Popovic, B. Vollinger, C. |
| description | In view of the High Luminosity (HL) upgrade of the LHC, the
beam intensity must be doubled in the injector chain. To perform
reliable beam dynamics simulations, the beam coupling impedance in
the injectors, such as the Proton Synchrotron (PS), must be followed
closely by including all contributing elements into the impedance
model. The existing kicker magnets of the PS had been optimized for
large kick strength and short rise/fall times, but not necessarily
to minimise beam coupling impedance. Hence, unwanted beam induced
voltage can build up in their electrical circuits, with an impact on
the beam. The beam coupling impedances of the two main kicker
magnets used for the fast extraction from PS, the KFA71 and KFA79,
are extensively characterized in this study. In particular,
electromagnetic simulation results for the longitudinal and
transverse coupling impedance are shown. The critical impedance
contributions are identified, and their effect on beam stability
with a possible mitigation solution is discussed. Moreover, the
impact of the cable terminations on the electromagnetic field
pattern and possible mitigation techniques are presented, providing
a complete impedance evaluation of the entire kicker installation. |
| doi_str_mv | 10.1088/1748-0221/19/08/T08001 |
| format | Article |
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beam intensity must be doubled in the injector chain. To perform
reliable beam dynamics simulations, the beam coupling impedance in
the injectors, such as the Proton Synchrotron (PS), must be followed
closely by including all contributing elements into the impedance
model. The existing kicker magnets of the PS had been optimized for
large kick strength and short rise/fall times, but not necessarily
to minimise beam coupling impedance. Hence, unwanted beam induced
voltage can build up in their electrical circuits, with an impact on
the beam. The beam coupling impedances of the two main kicker
magnets used for the fast extraction from PS, the KFA71 and KFA79,
are extensively characterized in this study. In particular,
electromagnetic simulation results for the longitudinal and
transverse coupling impedance are shown. The critical impedance
contributions are identified, and their effect on beam stability
with a possible mitigation solution is discussed. Moreover, the
impact of the cable terminations on the electromagnetic field
pattern and possible mitigation techniques are presented, providing
a complete impedance evaluation of the entire kicker installation.</description><identifier>ISSN: 1748-0221</identifier><identifier>EISSN: 1748-0221</identifier><identifier>DOI: 10.1088/1748-0221/19/08/T08001</identifier><language>eng</language><publisher>Bristol: IOP Publishing</publisher><subject>Accelerator Subsystems and Technologies ; Circuits ; Coupling ; Impedance ; Injectors ; Instrumentation for particle accelerators and storage rings - high energy (linear accelerators, synchrotrons) ; Large Hadron Collider ; Luminosity ; Magnets ; Proton beams</subject><ispartof>Journal of instrumentation, 2024-08, Vol.19 (8), p.T08001</ispartof><rights>2024 The Author(s)</rights><rights>2024 The Author(s). This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><cites>FETCH-LOGICAL-c274t-d9ff8f597baa82f761636898778abb16588595032527b42357f2e8364aae66bb3</cites><orcidid>0000-0002-3093-4897</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://iopscience.iop.org/article/10.1088/1748-0221/19/08/T08001/pdf$$EPDF$$P50$$Giop$$Hfree_for_read</linktopdf><link.rule.ids>314,776,780,27903,27904,53824,53871</link.rule.ids></links><search><creatorcontrib>Neroni, M.</creatorcontrib><creatorcontrib>Barnes, M.J.</creatorcontrib><creatorcontrib>Lasheen, A.</creatorcontrib><creatorcontrib>Mostacci, A.</creatorcontrib><creatorcontrib>Popovic, B.</creatorcontrib><creatorcontrib>Vollinger, C.</creatorcontrib><title>Beam coupling impedance of the main extraction kickers in the CERN PS</title><title>Journal of instrumentation</title><addtitle>J. Instrum</addtitle><description>In view of the High Luminosity (HL) upgrade of the LHC, the
beam intensity must be doubled in the injector chain. To perform
reliable beam dynamics simulations, the beam coupling impedance in
the injectors, such as the Proton Synchrotron (PS), must be followed
closely by including all contributing elements into the impedance
model. The existing kicker magnets of the PS had been optimized for
large kick strength and short rise/fall times, but not necessarily
to minimise beam coupling impedance. Hence, unwanted beam induced
voltage can build up in their electrical circuits, with an impact on
the beam. The beam coupling impedances of the two main kicker
magnets used for the fast extraction from PS, the KFA71 and KFA79,
are extensively characterized in this study. In particular,
electromagnetic simulation results for the longitudinal and
transverse coupling impedance are shown. The critical impedance
contributions are identified, and their effect on beam stability
with a possible mitigation solution is discussed. Moreover, the
impact of the cable terminations on the electromagnetic field
pattern and possible mitigation techniques are presented, providing
a complete impedance evaluation of the entire kicker installation.</description><subject>Accelerator Subsystems and Technologies</subject><subject>Circuits</subject><subject>Coupling</subject><subject>Impedance</subject><subject>Injectors</subject><subject>Instrumentation for particle accelerators and storage rings - high energy (linear accelerators, synchrotrons)</subject><subject>Large Hadron Collider</subject><subject>Luminosity</subject><subject>Magnets</subject><subject>Proton beams</subject><issn>1748-0221</issn><issn>1748-0221</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2024</creationdate><recordtype>article</recordtype><sourceid>O3W</sourceid><recordid>eNqFkFtLxDAQhYMouK7-BQn4JtQmaZNMHnVZL7Co6Poc0m6i2d1eTFvQf29LRfdB8GmGOd_MGQ5Cp5RcUAIQU5lCRBijMVUxgXhJgBC6hyY_wv5Of4iOmmZNCFc8JRM0v7KmwHnV1VtfvmJf1HZlytziyuH2zeLC-BLbjzaYvPVViTc-39jQ4H46yLP50z1-fD5GB85sG3vyXafo5Xq-nN1Gi4ebu9nlIsqZTNtopZwDx5XMjAHmpKAiEaBASjBZRgUH6N8iCeNMZilLuHTMQiJSY6wQWZZM0dl4tw7Ve2ebVq-rLpS9pU4IqFQxDrynxEjloWqaYJ2ugy9M-NSU6CEyPaShhzQ0VZqAHiPrF8_HRV_Vv5fXvuyNdkFdr1wPsz_gfxy-ADM2eZQ</recordid><startdate>20240801</startdate><enddate>20240801</enddate><creator>Neroni, M.</creator><creator>Barnes, M.J.</creator><creator>Lasheen, A.</creator><creator>Mostacci, A.</creator><creator>Popovic, B.</creator><creator>Vollinger, C.</creator><general>IOP Publishing</general><scope>O3W</scope><scope>TSCCA</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7U5</scope><scope>8FD</scope><scope>L7M</scope><orcidid>https://orcid.org/0000-0002-3093-4897</orcidid></search><sort><creationdate>20240801</creationdate><title>Beam coupling impedance of the main extraction kickers in the CERN PS</title><author>Neroni, M. ; Barnes, M.J. ; Lasheen, A. ; Mostacci, A. ; Popovic, B. ; Vollinger, C.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c274t-d9ff8f597baa82f761636898778abb16588595032527b42357f2e8364aae66bb3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2024</creationdate><topic>Accelerator Subsystems and Technologies</topic><topic>Circuits</topic><topic>Coupling</topic><topic>Impedance</topic><topic>Injectors</topic><topic>Instrumentation for particle accelerators and storage rings - high energy (linear accelerators, synchrotrons)</topic><topic>Large Hadron Collider</topic><topic>Luminosity</topic><topic>Magnets</topic><topic>Proton beams</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Neroni, M.</creatorcontrib><creatorcontrib>Barnes, M.J.</creatorcontrib><creatorcontrib>Lasheen, A.</creatorcontrib><creatorcontrib>Mostacci, A.</creatorcontrib><creatorcontrib>Popovic, B.</creatorcontrib><creatorcontrib>Vollinger, C.</creatorcontrib><collection>IOP Publishing Free Content</collection><collection>IOPscience (Open Access)</collection><collection>CrossRef</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>Technology Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Journal of instrumentation</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Neroni, M.</au><au>Barnes, M.J.</au><au>Lasheen, A.</au><au>Mostacci, A.</au><au>Popovic, B.</au><au>Vollinger, C.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Beam coupling impedance of the main extraction kickers in the CERN PS</atitle><jtitle>Journal of instrumentation</jtitle><addtitle>J. Instrum</addtitle><date>2024-08-01</date><risdate>2024</risdate><volume>19</volume><issue>8</issue><spage>T08001</spage><pages>T08001-</pages><issn>1748-0221</issn><eissn>1748-0221</eissn><abstract>In view of the High Luminosity (HL) upgrade of the LHC, the
beam intensity must be doubled in the injector chain. To perform
reliable beam dynamics simulations, the beam coupling impedance in
the injectors, such as the Proton Synchrotron (PS), must be followed
closely by including all contributing elements into the impedance
model. The existing kicker magnets of the PS had been optimized for
large kick strength and short rise/fall times, but not necessarily
to minimise beam coupling impedance. Hence, unwanted beam induced
voltage can build up in their electrical circuits, with an impact on
the beam. The beam coupling impedances of the two main kicker
magnets used for the fast extraction from PS, the KFA71 and KFA79,
are extensively characterized in this study. In particular,
electromagnetic simulation results for the longitudinal and
transverse coupling impedance are shown. The critical impedance
contributions are identified, and their effect on beam stability
with a possible mitigation solution is discussed. Moreover, the
impact of the cable terminations on the electromagnetic field
pattern and possible mitigation techniques are presented, providing
a complete impedance evaluation of the entire kicker installation.</abstract><cop>Bristol</cop><pub>IOP Publishing</pub><doi>10.1088/1748-0221/19/08/T08001</doi><tpages>12</tpages><orcidid>https://orcid.org/0000-0002-3093-4897</orcidid><oa>free_for_read</oa></addata></record> |
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| subjects | Accelerator Subsystems and Technologies Circuits Coupling Impedance Injectors Instrumentation for particle accelerators and storage rings - high energy (linear accelerators, synchrotrons) Large Hadron Collider Luminosity Magnets Proton beams |
| title | Beam coupling impedance of the main extraction kickers in the CERN PS |
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