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The presence of off-plane Ca II ions in the Beta Pictoris disk, and thenon-detection of off-plane Na I atoms, can be explained as a consequence of theevaporation process of Falling Evaporating Bodies (FEBs). In the star-grazingregime, the FEBs are subject to inclination oscillations up to 30 - 40 degreesthat causes most metallic species released by sublimation to move off plane Theions are be stopped at about 100 AU from the star. We show that collisions witha neutral medium can stop the ions. The required H I column density is reducedto 10^17 cm^-2, one order of magnitude below present detection limits. We alsoinvestigate the possibility that the ions are slowed down magnetically. Whilethe sole action of a magnetic field of the order of 1 microGauss is noteffective, the combined effect of magnetic and collisional decelerationprocesses lead to an additional lowering of the required H I column density.

High latitude gas in theβPictoris system