FIG 7 a shows imaging optics 28 with laser beams 12 which are focused on the interaction point 4 and projected by laser arrangements 5, shown schematically, whose imaging optics 28 are arranged in {HEAD ~ a circle} without {TAIL ~ gaps} 
without
FIG 7 a shows imaging optics 28 with laser beams 12 which are focused on the interaction point 4 and projected by laser arrangements 5 , shown schematically , whose imaging optics 28 are arranged in { HEAD ~ a circle } without { TAIL ~ gaps }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL