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The inclusion of an external magnetic field allows students to explore the underlying principles of magnetic confinement in a linear geometry.<\/jats:p>","DOI":"10.1088\/1361-6404\/abe020","type":"journal-article","created":{"date-parts":[[2021,1,26]],"date-time":"2021-01-26T17:32:10Z","timestamp":1611682330000},"page":"035203","update-policy":"https:\/\/doi.org\/10.1088\/crossmark-policy","source":"Crossref","is-referenced-by-count":6,"title":["An accessible microwave cavity experiment for plasma density determination"],"prefix":"10.1088","volume":"42","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-2784-214X","authenticated-orcid":false,"given":"J","family":"Oliveira","sequence":"first","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1420-4376","authenticated-orcid":false,"given":"D","family":"Hachmeister","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9058-6209","authenticated-orcid":false,"given":"P D","family":"Louren\u00e7o","sequence":"additional","affiliation":[]},{"given":"J","family":"Brotankova","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6542-7767","authenticated-orcid":false,"given":"H","family":"Fernandes","sequence":"additional","affiliation":[]}],"member":"266","published-online":{"date-parts":[[2021,2,18]]},"reference":[{"key":"ejpabe020bib1","doi-asserted-by":"publisher","first-page":"272","DOI":"10.1049\/pi-c.1960.0041","type":"journal-article","article-title":"Perturbation theory of resonant cavities","volume":"107","author":"Waldron","year":"1960","journal-title":"Proc. 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