Figure 2.

Moving source gamma irradiator, vertical source orientation. A linear γ source moves from the shielded source vault (A) and (B) (bottom to top) to the shielded irradiation chamber (cavity). The source is enclosed by the tube seen in (B). A rotating platter can be mounted on sample driveshaft locations (#1, #2, and #3) to provide rotation for dose homogeneity. A timer mechanism controls the irradiation time, ending with the return of the sources to the shielded source vault.