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High time-resolution solar wind magnetic field data is employed to studystatistics describing intermittency near the first perihelion (~35.6 Rs) of theParker Solar Probe mission. A merged dataset employing two instruments on theFIELDS suite enables broadband estimation of higher order moments of magneticfield increments, with five orders established with reliable accuracy. Theduration, cadence, and low noise level of the data permit evaluation of scaledependence of the observed intermittency from the inertial range to deepsubproton scales. The results support multifractal scaling in the inertialrange, and monofractal but non-Gaussian scaling in the subproton range, thusclarifying suggestions based on data near Earth that had remained ambiguous dueto possible interference of the terrestrial foreshock. The physics of thetransition to monofractality remains unclear but we suggest that it is due to ascale-invariant population of current sheets between ion and electron inertialscales; the previous suggestion of incoherent kinetic-scale wave activity isdisfavored as it presumably leads to re-Gaussianization which is not observed.

Subproton-scale Intermittency in Near-Sun Solar Wind Turbulence Observed by the Parker Solar Probe