Relativistic magnetic reconnection in colliding plasma clouds generated by multiple high-power laser pulses

The possibility to create the conditions for observing relativistic magnetic reconnection using two laser pulses in the planned XCELS facility is analyzed. The necessary conditions are supposed to be created in a scheme where the magnetized plasma flows are generated on the back surface of thin solid targets due to the beams of high-energy electrons thrown into the depth of the target by the laser pulse fields and forming a strong current at the axis of symmetry of the system. It is shown that in this case it is possible to obtain dense plasma bunches with a relatively low (of the order of several mega-electron-volts) temperature and a frozen-in magnetic field of the order of tens of kilotesla, so that the magnetization parameter will amount to several units.