{"id":"https://openalex.org/A5017289078","orcid":"https://orcid.org/0009-0005-3904-534X","observed_orcids":["https://orcid.org/0009-0005-3904-534X"],"display_name":"J Kall\u00e4hn","raw_author_names":["J Kall\u00e4hn","Jens Kall\u00e4hn"],"full_name":"J Kall\u00e4hn","works_count":3,"cited_by_count":73,"summary_stats":{"2yr_mean_citedness":0.0,"h_index":2,"i10_index":2},"ids":{"openalex":"https://openalex.org/A5017289078","orcid":"https://orcid.org/0009-0005-3904-534X","observed_orcids":["https://orcid.org/0009-0005-3904-534X"]},"affiliations":[{"institution":{"id":"https://openalex.org/I904495901","ror":"https://ror.org/04tsk2644","display_name":"Ruhr University Bochum","country_code":"DE","type":"education","lineage":["https://openalex.org/I904495901"]},"years":[2026,2023,2018]}],"last_known_institutions":[{"id":"https://openalex.org/I904495901","ror":"https://ror.org/04tsk2644","display_name":"Ruhr University Bochum","country_code":"DE","type":"education","lineage":["https://openalex.org/I904495901"]}],"topics":[{"id":"https://openalex.org/T10781","display_name":"Low-Pressure Plasma Processing and Diagnostics","count":3,"subfield":{"id":"https://openalex.org/subfields/2208","display_name":"Electrical and Electronic Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T12077","display_name":"Vacuum and Plasma Arcs","count":3,"subfield":{"id":"https://openalex.org/subfields/3107","display_name":"Atomic and Molecular Physics, and Optics"},"field":{"id":"https://openalex.org/fields/31","display_name":"Physics and Astronomy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10346","display_name":"Magnetic confinement fusion research","count":2,"subfield":{"id":"https://openalex.org/subfields/3106","display_name":"Nuclear and High Energy Physics"},"field":{"id":"https://openalex.org/fields/31","display_name":"Physics and Astronomy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10642","display_name":"Atmospheric-Pressure Plasma Applications","count":1,"subfield":{"id":"https://openalex.org/subfields/3107","display_name":"Atomic and Molecular Physics, and Optics"},"field":{"id":"https://openalex.org/fields/31","display_name":"Physics and Astronomy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"topic_share":[{"id":"https://openalex.org/T12077","display_name":"Vacuum and Plasma Arcs","value":1.13e-05,"subfield":{"id":"https://openalex.org/subfields/3107","display_name":"Atomic and Molecular Physics, and Optics"},"field":{"id":"https://openalex.org/fields/31","display_name":"Physics and Astronomy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10642","display_name":"Atmospheric-Pressure Plasma Applications","value":5.1e-06,"subfield":{"id":"https://openalex.org/subfields/3107","display_name":"Atomic and Molecular Physics, and Optics"},"field":{"id":"https://openalex.org/fields/31","display_name":"Physics and Astronomy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10781","display_name":"Low-Pressure Plasma Processing and Diagnostics","value":4e-07,"subfield":{"id":"https://openalex.org/subfields/2208","display_name":"Electrical and Electronic Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10346","display_name":"Magnetic confinement fusion research","value":1e-07,"subfield":{"id":"https://openalex.org/subfields/3106","display_name":"Nuclear and High Energy Physics"},"field":{"id":"https://openalex.org/fields/31","display_name":"Physics and Astronomy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"x_concepts":[{"id":"121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","score":0.857200026512146},{"id":"147120987","wikidata":"https://www.wikidata.org/wiki/Q2225","display_name":"Electron","score":0.758072555065155},{"id":"115260700","wikidata":"https://www.wikidata.org/wiki/Q11408","display_name":"Magnetic field","score":0.6452819108963013},{"id":"82706917","wikidata":"https://www.wikidata.org/wiki/Q10251","display_name":"Plasma","score":0.6016184687614441},{"id":"184779094","wikidata":"https://www.wikidata.org/wiki/Q26383","display_name":"Atomic physics","score":0.5744332075119019}],"counts_by_year":[{"year":2018,"works_count":1,"oa_works_count":1,"cited_by_count":0},{"year":2019,"works_count":0,"oa_works_count":0,"cited_by_count":3},{"year":2020,"works_count":0,"oa_works_count":0,"cited_by_count":7},{"year":2021,"works_count":0,"oa_works_count":0,"cited_by_count":9},{"year":2022,"works_count":0,"oa_works_count":0,"cited_by_count":5},{"year":2023,"works_count":1,"oa_works_count":1,"cited_by_count":16},{"year":2024,"works_count":0,"oa_works_count":0,"cited_by_count":13},{"year":2025,"works_count":0,"oa_works_count":0,"cited_by_count":9},{"year":2026,"works_count":1,"oa_works_count":1,"cited_by_count":11}],"display_name_alternatives":["J Kall\u00e4hn","Jens Kall\u00e4hn"],"block_key":"j kallahn","works_api_url":"https://api.openalex.org/works?filter=author.id:A5017289078","awards_count":0,"updated_date":"2026-11-07T12:08:38","created_date":"2018-09-27T00:00:00"}
