Now relativistic electronics engineering is intensively expand. The considerable place in it is occupied by devices, which are termed as free electron lasers (FEL). Their principle grounded is in that a mobile charged corpuscles (MCC) is reduced in oscillatory driving across a direction of the driving of it. Thus there is a radiation in a small solid angle forward on a direction of driving MCC. This radiation depends on a longitudinal velocity of MCC, and of a undulator step (see lower). The radiation can be coherent, so it gives name of FEL.
For the transversal oscillations of corpuscle, the system called by a undulator is applied. There are electrical or magnetic undulators. A magnetic system of a here is considered (Fig. 1).

Fig. 1

Deficiency of existing undulators is that for making a necessary magnetic field (MF) the big magnets are used. It is constructive restricts a step of a undulator - Lund (step of a change of MF is usually 0.5-10 cm).

For making an intensive beam of MCC and magnification of an output power of FEL, the multichannel scheme with addition of separate beams is applied (Fig. 2).

Fig. 2

In a Fig.2 are designated:
1. Primary beams of MCC.
2. The disperse magnetic lens.
3. Summary beam of MCC.
4. Undulator.
5. Output radiation.

Singularities of this scheme are:
1. The application for assembly of beams of a universal magnetic lens in a dispersing condition is allows to minimise the aperture of an output beam of MCC.
2. Application of a magnetic undulator with supersmall regulated period. That allows considerably to increase frequency of output radiation.

By magnification of an energy of emitted quantum up to 80MeV, it possible a following photonuclear reaction: ₈₃Bi²⁰⁹+80MeV→ ₇₉Au¹⁹⁷+2₂He⁴+4₀n¹. Probably, also, photonuclear decomposition of a radioactive materials (including military nuclear materials and any other materials right on rockets and of rockets).

Radiantes of MCC can be: electron and ion guns, radioactive radiantes of high intensity (Pu, Co, Sr �), ultrarays and streams of MCC from the Sun. Usage a TREG as a source of a MCC is quite possible. (Fig.3).

Fig. 3

In a Fig.3 are designated:
1. A segmented torus with a current I (the coils of electric motors of a various type and purposes may by used as a segments).
2. Toroidal plasma formation with MCC - (in figure is increased). It is initialized by means of an electrical spark in pairs H₂O, CH₄, NH₃ and other substances containing hydrogen.
3. The MF, used as a undulator.
4. Free electron generated by ionization of neutral corpuscle.
5. Output radiation.

By dotted line are shown an additional managing weak-current (i) coils. They are used for creation a weak MF (may be necessary or not). It MF is unidirectional with basic MF and rotates by consecutive cyclic switching of a weak-current coils.
It MF - for dynamic alignment possible technological disorders of a basic MF.