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These measurements permit calculation of \u2207\u00d7u\u2192 and canonical momentum, where u\u2192 is the plasma ion flow vector. The probe consists of four probe heads arranged in a tetrahedral pattern, with an overall probe diameter of \u223c31.75\u00a0mm. The probe head diameter is \u223c1.0\u00a0cm, which is of the order of the ion Larmor radius. Each head has four molybdenum electrodes, also arranged in tetrahedral geometry, which are biased relative to a common return electrode, using four power supplies (one for each head), to measure the local ion flow. In addition, each head has three orthogonal magnetic pickup coils within it to measure equilibrium and fluctuating magnetic fields.<\/jats:p>","DOI":"10.1063\/5.0321458","type":"journal-article","created":{"date-parts":[[2026,7,8]],"date-time":"2026-07-08T12:41:43Z","timestamp":1783514503000},"update-policy":"https:\/\/doi.org\/10.1063\/aip-crossmark-policy-page","source":"Crossref","is-referenced-by-count":0,"title":["A tetrahedral probe constellation approach for measuring canonical momentum in self-organized laboratory plasma"],"prefix":"10.1063","volume":"97","author":[{"ORCID":"https:\/\/orcid.org\/0009-0008-5634-3930","authenticated-orcid":false,"given":"C. C.","family":"Rouda","sequence":"first","affiliation":[{"name":"Department of Physics, University of Wisconsin-Madison 1 , Madison, Wisconsin 53706,","place":["USA"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0003-0366-9834","authenticated-orcid":false,"given":"A. 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