%AZhao, L.-L.%AZank, G.%AHu, Q.%ATelloni, D.%AChen, Y.%AAdhikari, L.%ANakanotani, M.%AKasper, J.%AHuang, J.%ABale, S.%AKorreck, K.%ACase, A.%AStevens, M.%ABonnell, J.%ADudok de Wit, T.%AGoetz, K.%AHarvey, P.%AMacDowall, R.%AMalaspina, D.%APulupa, M.%ALarson, D.%ALivi, R.%AWhittlesey, P.%AKlein, K.%ARaouafi, N.%Anull Ed.%BJournal Name: Astronomy & Astrophysics; Journal Volume: 650 %D2021%I %JJournal Name: Astronomy & Astrophysics; Journal Volume: 650 %K %MOSTI ID: 10300890 %PMedium: X %TDetection of small magnetic flux ropes from the third and fourth Parker Solar Probe encounters %XContext. Aims. We systematically search for magnetic flux rope structures in the solar wind to within the closest distance to the Sun of ~0.13 AU, using data from the third and fourth orbits of the Parker Solar Probe. Methods. We extended our previous magnetic helicity-based technique of identifying magnetic flux rope structures. The method was improved upon to incorporate the azimuthal flow, which becomes larger as the spacecraft approaches the Sun. Results. A total of 21 and 34 magnetic flux ropes are identified during the third (21-day period) and fourth (17-day period) orbits of the Parker Solar Probe, respectively. We provide a statistical analysis of the identified structures, including their relation to the streamer belt and heliospheric current sheet crossing. %0Journal Article