A new possibility to monitor collisions of relativistic heavy ions at LHC and RHIC
Engel, R. · Schiller, A. · Serbo, V. G.
Original · EN
We consider the radiation of particles of one bunch in the collective field of the oncoming bunch, called coherent bremsstrahlung (CBS). The main characteristics of CBS for LHC (in the Pb-Pb mode) and for RHIC are calculated. At LHC about 3.9 10⁸ dEγ/Eγ photons per second are expected for photon energies Eγ< Ec= 93 eV. It seems that CBS can be a potential tool for optimizing collisions and for measuring beam parameters. The bunch length can be found from the critical energy of the CBS spectrum; the transverse bunch size is related to the photon rate. A specific dependence of photon rate on the impact parameter between the beams allows for a fast control over the beam displacement.
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