content of peaks of both cosmic ray and PbPb-events was revealed by the wavelet analysis [@adk; @dikk] of the particle distribution in the plane perpendicular to the axis of collision. Fig. 4 shows the dark regions with large wavelet coefficients corresponding to dense groups of particles in a PbPb-event. There is a tendency for these groups to fill in the two rings. We ascribe them to Cherenkov gluonic rings.

The multiplicities at LHC will be much higher. Therefore the wavelet analysis of very high multiplicity events can be more effective and should be used for search of dfferent patterns like jets, rings, fractality, elliptic flow, higher Fourier coefficients, i.e., in general, for event-by-event studies of the three-dimensional phase space structure. Fig. 4. The two-dimensional ($\eta - \phi $) distribution of particles in a PbPb-event at 158 GeV as revealed by the wavelet analysis.\
The problem of the finiteness of the nuclear target was discussed in [@2]. The criterium for the target size $L$ to be considered as infinite is $$E_tL\Delta n \gg 1  \;\;\;\; {\rm or} \;\;\;\; L \gg \frac {1}{E_t\Delta n}.$$ It is well fulfilled in the RHIC trigger experiment. Here $\Delta n \approx 2$ and $E_t$ is approximately 