[en] Shaping and transport of a 670 MeV proton beam in a two-arm spectrometer are described. They are constructed on the Dubna synchrocyclotron to investigate direct nuclear reactions with outgoing fast deuterons. A method is also given for measuring two-dimensional distribution of absolute beam intensity with ¹²C activation in polyethylene. The beam transport and shaping are performed with quadrupole doublet and bending magnet. To diminish the beam emittance and to obtain the needed beam intensity the collimator has been mounted at the beam exit from the synchrocyclotron chamber. With the optimum collimator setting the intensity measured directly behind the collimator is equal to 1.3x10¹⁰ protons/s, the beam emittance being diminished to approximately 100 mm. rad both in the horizontal and vertical planes. At the target area the beam has dimensions of 15 mm vertically and aproximately 80 mm horizontally (this corresponds to 2.5% momentum spread immediately behind the collimator), its intensity is 70-80% of that at the exit from the collimator. To measure the intensity a matrix of polyethylene granules has been used. The activity induced in polyethylene has been measured by detecting coincidences of γ-quanta from annihilation of positrons produced in the ¹²C → ¹¹B+β⁺+ν