title: Sign-singularity of the reduced magnetic helicity in the solar wind plasma.
abstract: We investigate the scaling laws of a signed measure derived from the reduced magnetic helicity which has been determined from Cluster data in the solar wind. This quantifies the handedness of the magnetic field; namely, it can be related to the polarization of the magnetic field fluctuations (right or left hand). The measure results to be sign-singular; that is, we do not observe any scale-dependent effect at the ion- and at electron-cyclotron frequencies. Cancellations between right- and left-hand polarizations go on in the dispersive or dissipative range, beyond the electron-cyclotron frequency. This means that the mechanism responsible for the generation of the dispersive or dissipative range is rather insensitive to the polarization of the magnetic field fluctuations.
authors.affiliation: Dipartimento di Fisica, Universitá della Calabria, 87036 Rende (CS), Italy.
authors.forename: V
authors.initials: V
authors.lastname: Carbone
authors.forename: S
authors.initials: S
authors.lastname: Perri
authors.forename: E
authors.initials: E
authors.lastname: Yordanova
authors.forename: P
authors.initials: P
authors.lastname: Veltri
authors.forename: R
authors.initials: R
authors.lastname: Bruno
authors.forename: Y
authors.initials: Y
authors.lastname: Khotyaintsev
authors.forename: M
authors.initials: M
authors.lastname: André