In this case, {HEAD ~ the imaging optics} 28 which are oriented with {TAIL ~ their optical axes} 15 on the interaction point 4 lie in a plane 42 that is arranged parallel to the target axis 31 and orthogonal to optical axis 61 of the collector mirror 6 
In this case , { HEAD ~ the imaging optics } 28 which are oriented with { TAIL ~ their optical axes } 15 on the interaction point 4 lie in a plane 42 that is arranged parallel to the target axis 31 and orthogonal to optical axis 61 of the collector mirror 6
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL 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