Performance of the Sumy nuclear microprobe with the integrated probe-forming system

Formation of ion beam with high current density for micro irradiation techniques

“…Such approach has been described in detail in [11]. For numerical simulation, parameters of PFS of the IAP NASU nuclear scanning microprobe [13,14] were taken. Protons with energy 1 MeV and momentum spread of d max = 10 À3 were taken for calculation.…”

“…A simple program code was used to obtain a theoretical profile of SEE and to modulate a scanning procedure of a semi-infinite plate edge with specified current density distribution (Fig. 3) [14].…”

Influence of the beam current density distribution on the spatial resolution of a nuclear microprobe

“…For the yy' phase plane we used the same scheme rotated by 90°. The direct current measurements were performed using a current integrator described in [3]. The averaged current distribution is shown in Fig.…”

“…The number of particles in a pixel on the target is N = I/(f Á q) where q is the ion charge and f is the beam scanning frequency. All particles are distributed randomly in the phase space under the hypersurface b(x, y, x 0 , y 0 ) specified by the distribution (1) and parameters (3). To do this, the reject method described in [4] was used.…”

“…Fig. 3 shows the beam current density distribution J(x 0 , y 0 ) and current distribution Pðx 0 0 ; y 0 0 Þ in the solid angle in the object collimator plane for the total beam current I = 200 pA distributed according to (1), (3). From Fig.…”