  A possible solution to realize a conventional positron source driven by a
several-GeV electron beam for the International Linear Collider is proposed. A
300 Hz electron linac is employed to create positrons with stretching pulse
length in order to cure target thermal load. ILC requires about 2600 bunches in
a train which pulse length is 1 ms. Each pulse of the 300 Hz linac creates
about 130 bunches, then 2600 bunches are created in 63 ms. Optimized parameters
such as drive beam energy, beam size, and target thickness, are discussed
assuming a L-band capture system to maximize the capture efficiency and to
mitigate the target thermal load. A slow rotating tungsten disk is employed as
positron generation target.
