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dc.contributor.authorAngot, Julien
dc.contributor.authorLuntinen, Miha
dc.contributor.authorKalvas, Taneli
dc.contributor.authorKoivisto, Hannu
dc.contributor.authorKronholm, Risto
dc.contributor.authorMaunoury, Laurent
dc.contributor.authorTarvainen, Olli
dc.contributor.authorThuillier, Thomas
dc.contributor.authorToivanen, Ville
dc.date.accessioned2021-02-15T11:37:14Z
dc.date.available2021-02-15T11:37:14Z
dc.date.issued2021
dc.identifier.citationAngot, J., Luntinen, M., Kalvas, T., Koivisto, H., Kronholm, R., Maunoury, L., Tarvainen, O., Thuillier, T., & Toivanen, V. (2021). Method for estimating charge breeder ECR ion source plasma parameters with short pulse 1+ injection of metal ions. <i>Plasma Sources Science and Technology</i>, <i>30</i>(3), Article 035018. <a href="https://doi.org/10.1088/1361-6595/abe611" target="_blank">https://doi.org/10.1088/1361-6595/abe611</a>
dc.identifier.otherCONVID_51481503
dc.identifier.urihttps://jyx.jyu.fi/handle/123456789/74233
dc.description.abstractA new method for determining plasma parameters from beam current transients resulting from short pulse 1+ injection of metal ions into a Charge Breeder Electron Cyclotron Resonance Ion Source (CB-ECRIS) has been developed. The proposed method relies on few assumptions, and yields local values for the ionisation times 1/ne<sup>inz</sup>q → q+1, charge exchange times 1/n0<sup>cx</sup>q → q-1, the ion confinement times τq, as well as estimates for the minimum plasma energy contents ne < Ee > and the plasma triple products ne < Ee > τq. The method is based on fitting the current balance equation on the extracted beam currents of high charge state ions, and using the fitting coefficients to determine the postdictions for the plasma parameters via an optimisation routine. The method has been applied for the charge breeding of injected K+ ions in helium plasma. It is shown that the confinement times of Kq+ charge states range from 2.6+0.8-0.4 ms to 16.4+18.3-6.8 ms increasing with the charge state. The ionisation and charge exchange times for the high charge state ions are 2.6+0.5-0.5 ms-12.6+2.6-3.2 ms and 3.7+5.0-1.6 ms-357.7+406.7-242.4 ms, respectively. The plasma energy content is found to be 2.5+4.3-1.8 × 1015 eV/cm3.en
dc.format.mimetypeapplication/pdf
dc.languageeng
dc.language.isoeng
dc.publisherIOP Publishing
dc.relation.ispartofseriesPlasma Sources Science and Technology
dc.rightsCC BY-NC-ND 4.0
dc.titleMethod for estimating charge breeder ECR ion source plasma parameters with short pulse 1+ injection of metal ions
dc.typearticle
dc.identifier.urnURN:NBN:fi:jyu-202102151656
dc.contributor.laitosFysiikan laitosfi
dc.contributor.laitosDepartment of Physicsen
dc.type.urihttp://purl.org/eprint/type/JournalArticle
dc.description.reviewstatuspeerReviewed
dc.relation.issn0963-0252
dc.relation.numberinseries3
dc.relation.volume30
dc.type.versionacceptedVersion
dc.rights.copyright© 2021 IOP Publishing
dc.rights.accesslevelopenAccessfi
dc.subject.ysoplasmafysiikka
dc.subject.ysohiukkaskiihdyttimet
dc.subject.ysosyklotronit
dc.format.contentfulltext
jyx.subject.urihttp://www.yso.fi/onto/yso/p10238
jyx.subject.urihttp://www.yso.fi/onto/yso/p14309
jyx.subject.urihttp://www.yso.fi/onto/yso/p15295
dc.rights.urlhttps://creativecommons.org/licenses/by-nc-nd/4.0/
dc.relation.doi10.1088/1361-6595/abe611


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