The data table shows the correlation of helicality and rotation frequency of plasma filamants at a power of 8 W. From the images of filaments, the angle of inclination alpha has been obtained. The helicality k has been calculated according to the equation k=tan(alpha)/r. Here, r is the radial position of filaments in the capillary, and alpha is measured from the line parallel to the jet axis. The corresponding rotation frequency of filaments has been measured by means of laser schlieren deflectometry (LSD).