{"id":6473,"date":"2026-10-19T09:48:57","date_gmt":"2026-10-19T09:48:57","guid":{"rendered":"https:\/\/phd.hi.is\/doktorsvorn\/doktorsvorn-i-edlisfraedi-kateryna-barynova\/"},"modified":"2026-10-19T09:48:57","modified_gmt":"2026-10-19T09:48:57","slug":"doktorsvorn-i-edlisfraedi-kateryna-barynova","status":"publish","type":"phd_defence","link":"https:\/\/phd.hi.is\/en\/doktorsvorn\/doktorsvorn-i-edlisfraedi-kateryna-barynova\/","title":{"rendered":"Doktorsv\u00f6rn \u00ed e\u00f0lisfr\u00e6\u00f0i – Kateryna Barynova"},"content":{"rendered":"
\n
\n

Streymi<\/a><\/strong><\/p>\n

<\/strong>Doktorsefni:
<\/strong>Kateryna Barynova<\/p>\n

Heiti ritger\u00f0ar:
<\/strong>Fl\u00f3tti m\u00e1lmj\u00f3na og gas\u00feynning \u00ed h\u00e1aflsp\u00falsa\u00f0ri segulsp\u00e6tu\u00a0<\/p>\n

Andm\u00e6lendur:<\/strong>
Dr. Tom\u00e1\u0161 Koz\u00e1k, d\u00f3sent vi\u00f0 the Department of Physics and NTIS, University of West Bohemia in Pilsen, T\u00e9kklandi
Dr. Julian Held, lektor vi\u00f0 the Plasma & Materials Processing (PMP) at Eindhoven University of Technology, Hollandi<\/p>\n

Lei\u00f0beinandi:
<\/strong>Dr. J\u00f3n T\u00f3mas Gu\u00f0mundsson, pr\u00f3fessor vi\u00f0 Raunv\u00edsindadeild H\u00e1sk\u00f3la \u00cdslands<\/p>\n

Einnig \u00ed doktorsnefnd:
<\/strong>Dr. Martin Rudolph, Leibniz Institute of Surface Engineering (IOM), \u00de\u00fdskalandi
Dr. Daniel Lundin, pr\u00f3fessor vi\u00f0 Coatings and Plasma Physics Division, Department of Physics, Chemistry and Biology (IFM), Link\u00f6ping University, Sv\u00ed\u00fej\u00f3\u00f0<\/p>\n

Doktorsv\u00f6rn st\u00fdrir:
<\/strong>Dr. Birgir Hrafnkelsson, pr\u00f3fessor og deildarforseti Raunv\u00edsindadeildar H\u00cd\u00a0<\/p>\n

\u00c1grip:
<\/strong>H\u00e1aflsp\u00falsu\u00f0 segulsp\u00e6ta (HiPIMS) er r\u00e6ktunart\u00e6kni sem byggir \u00e1 h\u00e1u hlutfalli j\u00f3na\u00f0ra agna \u00ed agnafl\u00e6\u00f0inu sem byggir upp h\u00fa\u00f0ina, en notar n\u00e1nast sama t\u00e6kjab\u00fana\u00f0 og jafnstraumssegulsp\u00e6tun, og hefur meiri sveigjanleika hva\u00f0 var\u00f0ar \u00fea\u00f0 a\u00f0 st\u00fdra megi g\u00e6\u00f0um r\u00e6kta\u00f0rar h\u00fa\u00f0ar.
\u00cd samanbur\u00f0i vi\u00f0 h\u00fa\u00f0ir r\u00e6kta\u00f0ar me\u00f0 hef\u00f0bundinni dc segulsp\u00e6tu s\u00fdna h\u00fa\u00f0ir sem r\u00e6kta\u00f0ar me\u00f0 HiPIMS yfirleitt b\u00e6tta e\u00f0liseiginleika, svo sem betri kristallsbyggingu, h\u00e6rri e\u00f0lismassa og b\u00e6tta fasasamsetningu, a\u00f0allega vegna l\u00e1gorku j\u00f3nahr\u00ed\u00f0ar \u00e1 vaxtarstiginu. Hins vegar er \u00fatbreiddari i\u00f0na\u00f0arnotkun HiPIMS verulega takm\u00f6rku\u00f0 vegna helsta \u00f3kosts \u00feessarar t\u00e6kni: verulega minni r\u00e6ktunarhra\u00f0a. \u00deessi l\u00e1gi r\u00e6ktunarhra\u00f0i er rakinn til \u00feess a\u00f0 eftir j\u00f3nun sp\u00e6ttu at\u00f3manna \u00ed \u00fe\u00e9ttu rafgasinu n\u00e6rri bakskautsskotmarkinu, er st\u00f3r hluti \u00feeirra dreginn aftur a\u00f0 bakskautinu. Megin markmi\u00f0 ritger\u00f0arinnar er a\u00f0 leita lei\u00f0a til a\u00f0 breg\u00f0ast vi\u00f0 \u00feessari helstu takm\u00f6rkun HiPIMS t\u00e6kninnar me\u00f0 \u00fev\u00ed a\u00f0 rannsaka e\u00f0lisfr\u00e6\u00f0ina sem l\u00fdsir afhle\u00f0slunni og tengslin milli afraksturs sp\u00e6tunar (e. sputter yield) og r\u00e6ktunarhra\u00f0a. Meginmarkmi\u00f0i\u00f0 var a\u00f0 greina og \u00fer\u00f3a \u00e1fram j\u00f3nunarsv\u00e6\u00f0isl\u00edkani\u00f0 (IRM) fyrir h\u00e1flsp\u00falsa\u00f0ar segulsp\u00e6tur til \u00feess a\u00f0 besta r\u00e6ktunarferli\u00f0. \u00deetta f\u00f3l \u00ed s\u00e9r l\u00edkanager\u00f0, \u00fear \u00e1 me\u00f0al ranns\u00f3knir \u00e1 gas\u00feynningu vinnugassins fyrir m\u00f6rg mismunandi skotm\u00f6rk, l\u00edkanager\u00f0 \u00e1 afhle\u00f0slum me\u00f0 skotm\u00f6rk \u00far kr\u00f3m, \u00e1li og graf\u00edti, \u00ed \u00fdmsum gasbl\u00f6ndum (t.d. Ne\/Ar), og greiningu \u00e1 ni\u00f0urst\u00f6\u00f0um \u00far \u00feessum hermununum. Meginni\u00f0ursta\u00f0an, sem studd er af gagnagreiningu \u00e1 IRM-hermunum fyrir \u00fdmis skotm\u00f6rk, vi\u00f0 fj\u00f6lbreytt afhle\u00f0sluskilyr\u00f0i, er s\u00fa a\u00f0 afrakstur sp\u00e6tunar r\u00e6\u00f0ur l\u00edkunum \u00e1 \u00fev\u00ed a\u00f0 sp\u00e6ttu agnirnar dragist aftur a\u00f0 skotmarkinu. S\u00fdnt er fram \u00e1 a\u00f0 afrakstur sp\u00e6tunar s\u00e9 lykil\u00fe\u00e1tturinn \u00ed a\u00f0 breyta samsetningu agna \u00ed afhle\u00f0slunni, rafeindahitastigi, hve miki\u00f0 vinnugasi\u00f0 \u00feynnist og \u00fear me\u00f0 m\u00f6gulegum takm\u00f6rkunum \u00e1 r\u00e6ktunarhra\u00f0a, svo og heildareiginleikum afhle\u00f0slunnar. Enn fremur \u00e1kvar\u00f0ar afrakstur sp\u00e6tunar \u00fev\u00ed hva\u00f0a ferli ber megin\u00e1byrg\u00f0 \u00e1 \u00feynningu vinnugassins. \u00deegar upp er sta\u00f0i\u00f0 sta\u00f0festir \u00feetta verk a\u00f0 afrakstur sp\u00e6tunar skotmarksins s\u00e9 mikilv\u00e6g st\u00fdrist\u00e6r\u00f0 \u00feegar besta \u00e1 h\u00e1aflsp\u00falsa\u00f0a segulsp\u00e6tu. Ritger\u00f0in \u00fej\u00f3nar sem inngangur a\u00f0 \u00feeim e\u00f0lisfr\u00e6\u00f0ilegu ferlum sem rannsaka\u00f0ir voru, en megin ni\u00f0urst\u00f6\u00f0ur verksins eru kynntar \u00ed me\u00f0fylgjandi greinum. \u00cd verkinu er einnig fjalla\u00f0 um tilraunir \u00fear sem \u00e1hersla er l\u00f6g\u00f0 \u00e1 a\u00f0 m\u00e6la hlutfall j\u00f3na\u00f0s fl\u00e6\u00f0is (IFF) \u00ed h\u00fa\u00f0unarfl\u00e6\u00f0inu. \u00deessi tilraunag\u00f6gn voru notu\u00f0 til a\u00f0 afmarka eina af breytum IRM-l\u00edkansins, sem b\u00e6tir forsp\u00e1rgildi l\u00edkansins.<\/p>\n

Um doktorsefni\u00f0:
<\/strong>Kateryna Barynova lauk M2-gr\u00e1\u00f0u \u00ed kjarna-, agna- og stjarnagnae\u00f0lisfr\u00e6\u00f0i og heimsfr\u00e6\u00f0i fr\u00e1 Universit\u00e9 Paris-Saclay \u00e1ri\u00f0 2021 me\u00f0 stu\u00f0ningi fr\u00e1 IDEX al\u00fej\u00f3\u00f0lega meistaran\u00e1msstyrknum. \u00c1\u00f0ur lauk h\u00fan b\u00e6\u00f0i meistara- og bakkal\u00e1rgr\u00e1\u00f0u \u00ed e\u00f0lisfr\u00e6\u00f0i fr\u00e1 Taras Shevchenko h\u00e1sk\u00f3lanum \u00ed K\u00e6nugar\u00f0i, \u00e1rin 2020 og 2018. N\u00faverandi ranns\u00f3knir hennar beinast a\u00f0 l\u00edkanager\u00f0 \u00e1 afhle\u00f0slum \u00ed l\u00e1ghitarafgasi, en h\u00fan hefur veri\u00f0 me\u00f0h\u00f6fundur a\u00f0 fj\u00f6lda greina \u00ed helstu v\u00edsindat\u00edmaritum og flutt erindi \u00e1 al\u00fej\u00f3\u00f0legum r\u00e1\u00f0stefnum. H\u00fan hlaut ver\u00f0laun fyrir bestu nemendagreinina \u00e1 51. al\u00fej\u00f3\u00f0legu IEEE r\u00e1\u00f0stefnunni um Plasma Science (51st ICOPS). \u00c1\u00f0ur en h\u00fan h\u00f3f doktorsn\u00e1m var Katerynu \u00ed starfsn\u00e1mi hj\u00e1 CEA Paris-Saclay og fr\u00f6nsku kjarnorku- og agnae\u00f0lisfr\u00e6\u00f0istofnuninni, \u00fear sem h\u00fan s\u00e9rh\u00e6f\u00f0i sig \u00ed gagna\u00farsvinnslu \u00e1 gammageislahrotum og fj\u00f6lbo\u00f0astjarnfr\u00e6\u00f0i. H\u00fan var einnig me\u00f0limur \u00ed GRANDMA, al\u00fej\u00f3\u00f0legu tengslaneti sj\u00f3nauka sem helga\u00f0 er fj\u00f6lbo\u00f0astjarnfr\u00e6\u00f0i, og var \u00fear me\u00f0h\u00f6fundur a\u00f0 nokkrum ranns\u00f3knargreinum. \u00c1ri\u00f0 2012 vann Kateryna silfurver\u00f0laun \u00e1 International Olympiad on Astronomy and Astrophysics (IOAA).<\/p>\n

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