Publicação
Study of SEY degradation of amorphous carbon coatings
| Resumo: | Deposition of low secondary electron yield (SEY) carbon coatings by magnetron sputtering onto the inner walls of the accelerator seems to be the most promising solution for suppressing the electron cloud problem. However, these coatings change their electron emission properties during long term exposure to air. The ageing process of carbon coated samples with initial SEY of about 0.9 received from CERN is studied as a function of exposure to different environments. It is shown that samples having the same initial SEY may age with different rates. The SEY increase can be correlated with the surface concentration of oxygen. Annealing of samples in air at 100-200 °C reduces the ageing rate and even recovers previously degraded samples. The result of annealing is reduction of the hydrogen content in the coatings by triggering its surface segregation followed by desorption |
|---|---|
| Autores principais: | Bundaleski, Nenad |
| Outros Autores: | Candeias, S.; Santos, A.; Silva, Ana Cristina Gomes da; Teodoro, Orlando Manuel Neves Duarte; Silva, A. G. |
| Assunto: | FILMS |
| Ano: | 2013 |
| País: | Portugal |
| Tipo de documento: | documento de conferência |
| Tipo de acesso: | acesso aberto |
| Instituição associada: | Universidade Nova de Lisboa |
| Idioma: | inglês |
| Origem: | Repositório Institucional da UNL |
| _version_ | 1865920626829557760 |
|---|---|
| author | Bundaleski, Nenad |
| author2 | Candeias, S. Santos, A. Silva, Ana Cristina Gomes da Teodoro, Orlando Manuel Neves Duarte Silva, A. G. |
| author2_role | author author author author author |
| author_facet | Bundaleski, Nenad Bundaleski, Nenad Candeias, S. Santos, A. Silva, Ana Cristina Gomes da Teodoro, Orlando Manuel Neves Duarte Silva, A. G. Candeias, S. Santos, A. Silva, Ana Cristina Gomes da Teodoro, Orlando Manuel Neves Duarte Silva, A. G. |
| author_role | author |
| contributor_name_str_mv | DF – Departamento de Física CeFITec – Centro de Física e Investigação Tecnológica RUN |
| country_str | PT |
| creators_json_str | [{\"Person.name\":\"Bundaleski, Nenad\"},{\"Person.name\":\"Candeias, S.\"},{\"Person.name\":\"Santos, A.\"},{\"Person.name\":\"Silva, Ana Cristina Gomes da\"},{\"Person.name\":\"Teodoro, Orlando Manuel Neves Duarte\"},{\"Person.name\":\"Silva, A. G.\"}] |
| datacite.contributors.contributor.contributorName.fl_str_mv | DF – Departamento de Física CeFITec – Centro de Física e Investigação Tecnológica RUN |
| datacite.creators.creator.creatorName.fl_str_mv | Bundaleski, Nenad Candeias, S. Santos, A. Silva, Ana Cristina Gomes da Teodoro, Orlando Manuel Neves Duarte Silva, A. G. |
| datacite.date.Accepted.fl_str_mv | 2013-01-01T00:00:00Z |
| datacite.date.available.fl_str_mv | 2017-05-30T14:14:17Z |
| datacite.date.embargoed.fl_str_mv | 2017-05-30T14:14:17Z |
| datacite.rights.fl_str_mv | http://purl.org/coar/access_right/c_abf2 |
| datacite.subjects.subject.fl_str_mv | FILMS |
| datacite.titles.title.fl_str_mv | Study of SEY degradation of amorphous carbon coatings |
| dc.contributor.none.fl_str_mv | DF – Departamento de Física CeFITec – Centro de Física e Investigação Tecnológica RUN |
| dc.creator.none.fl_str_mv | Bundaleski, Nenad Candeias, S. Santos, A. Silva, Ana Cristina Gomes da Teodoro, Orlando Manuel Neves Duarte Silva, A. G. |
| dc.date.Accepted.fl_str_mv | 2013-01-01T00:00:00Z |
| dc.date.available.fl_str_mv | 2017-05-30T14:14:17Z |
| dc.date.embargoed.fl_str_mv | 2017-05-30T14:14:17Z |
| dc.format.none.fl_str_mv | application/pdf |
| dc.identifier.none.fl_str_mv | http://hdl.handle.net/10362/21154 |
| dc.language.none.fl_str_mv | eng |
| dc.publisher.none.fl_str_mv | CERN |
| dc.rights.none.fl_str_mv | http://purl.org/coar/access_right/c_abf2 |
| dc.subject.none.fl_str_mv | FILMS |
| dc.title.fl_str_mv | Study of SEY degradation of amorphous carbon coatings |
| dc.type.none.fl_str_mv | http://purl.org/coar/resource_type/c_c94f |
| description | Deposition of low secondary electron yield (SEY) carbon coatings by magnetron sputtering onto the inner walls of the accelerator seems to be the most promising solution for suppressing the electron cloud problem. However, these coatings change their electron emission properties during long term exposure to air. The ageing process of carbon coated samples with initial SEY of about 0.9 received from CERN is studied as a function of exposure to different environments. It is shown that samples having the same initial SEY may age with different rates. The SEY increase can be correlated with the surface concentration of oxygen. Annealing of samples in air at 100-200 °C reduces the ageing rate and even recovers previously degraded samples. The result of annealing is reduction of the hydrogen content in the coatings by triggering its surface segregation followed by desorption |
| dirty | 0 |
| eu_rights_str_mv | openAccess |
| format | conferenceObject |
| fulltext.url.fl_str_mv | https://run.unl.pt/bitstreams/9bf7b7e7-c894-4e8a-b3f1-614fb1b19e7a/download |
| funding.funder.alternateName_str_mv | FCT |
| funding.funder.identifier_str_mv | http://doi.org/10.13039/501100001871 |
| funding.funder.name_str_mv | Fundação para a Ciência e a Tecnologia |
| funding.name_str_mv | 3599-PPCDT |
| id | run_ee6ccbc1a3f0ff0cddecae33b24564bc |
| identifier.url.fl_str_mv | http://hdl.handle.net/10362/21154 |
| instacron_str | unl |
| institution | Universidade Nova de Lisboa |
| instname_str | Universidade Nova de Lisboa |
| language | eng |
| network_acronym_str | run |
| network_name_str | Repositório Institucional da UNL |
| oai_identifier_str | oai:run.unl.pt:10362/21154 |
| organization_str_mv | urn:organizationAcronym:unl |
| person_str_mv | Bundaleski, Nenad Candeias, S. Santos, A. Silva, Ana Cristina Gomes da Teodoro, Orlando Manuel Neves Duarte Silva, A. G. |
| publishDate | 2013 |
| publisher.none.fl_str_mv | CERN |
| reponame_str | Repositório Institucional da UNL |
| repository_id_str | urn:repositoryAcronym:run |
| service_str_mv | urn:repositoryAcronym:run |
| spelling | engCERNenDeposition of low secondary electron yield (SEY) carbon coatings by magnetron sputtering onto the inner walls of the accelerator seems to be the most promising solution for suppressing the electron cloud problem. However, these coatings change their electron emission properties during long term exposure to air. The ageing process of carbon coated samples with initial SEY of about 0.9 received from CERN is studied as a function of exposure to different environments. It is shown that samples having the same initial SEY may age with different rates. The SEY increase can be correlated with the surface concentration of oxygen. Annealing of samples in air at 100-200 °C reduces the ageing rate and even recovers previously degraded samples. The result of annealing is reduction of the hydrogen content in the coatings by triggering its surface segregation followed by desorptionapplication/pdfenStudy of SEY degradation of amorphous carbon coatingsBundaleski, NenadCandeias, S.Santos, A.Silva, Ana Cristina Gomes daTeodoro, Orlando Manuel Neves DuarteSilva, A. G.DF – Departamento de FísicaCeFITec – Centro de Física e Investigação TecnológicaHostingInstitutionOrganizationalRUNe-mailmailto:run@unl.ptrun@unl.ptISBNIsPartOf978–92–9083–386–4ISSNIsPartOf0007-8328URNIsPartOfPURE: 240448URNIsPartOfPURE UUID: d97335fe-254b-4d46-8437-3686f700c872URNIsPartOfresearchoutputwizard: 39194URNIsPartOfWOS: 000392504600021URNIsPartOfORCID: /0000-0001-7590-3042/work/67534069URNIsPartOfORCID: /0000-0002-3424-2847/work/85867947DOIIsPartOf10.5170/CERN-2013-002.1492017-05-30T14:14:17Z20132013-01-01T00:00:00ZHandlehttp://hdl.handle.net/10362/21154http://purl.org/coar/access_right/c_abf2open accessFILMS540215 bytesFundação para a Ciência e a TecnologiaAir exposure induced changes on coatings used to limit the e-cloud in accelerators3599-PPCDTCrossref Funder IDhttp://doi.org/10.13039/501100001871other research producthttp://purl.org/coar/resource_type/c_c94fconference objecthttp://purl.org/coar/access_right/c_abf2application/pdffulltexthttps://run.unl.pt/bitstreams/9bf7b7e7-c894-4e8a-b3f1-614fb1b19e7a/download |
| spellingShingle | Study of SEY degradation of amorphous carbon coatings Study of SEY degradation of amorphous carbon coatings Bundaleski, Nenad FILMS Bundaleski, Nenad FILMS |
| status | NEW |
| subject.fl_str_mv | FILMS |
| title | Study of SEY degradation of amorphous carbon coatings |
| title_full | Study of SEY degradation of amorphous carbon coatings |
| title_fullStr | Study of SEY degradation of amorphous carbon coatings Study of SEY degradation of amorphous carbon coatings |
| title_full_unstemmed | Study of SEY degradation of amorphous carbon coatings Study of SEY degradation of amorphous carbon coatings |
| title_short | Study of SEY degradation of amorphous carbon coatings |
| title_sort | Study of SEY degradation of amorphous carbon coatings |
| topic | FILMS |
| topic_facet | FILMS |
| url | http://hdl.handle.net/10362/21154 |
| visible | 1 |