The invention provides a multipole ion trap. The remaining linear unreacted polyaromtic compound and the polyaromatic compound-olefin adduct can be heated to dissociate the adduct to linear polyaromatic compound and olefin stream enriched in trans-isomer. The pedicle rod is secured to the head by a fastener. of the compositions, as well as further optional constituents. The encapsulant has a plurality of lenses connected to each other and each lens corresponds to one of the plurality of light emitting diode chips. The light-emitting unit comprises a start phase controller for controlling the start phases.