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The fs-THz beamline construction at PAL (Pohang Accelerator Laboratory) was completed in the end of 2009. The fs-THz beamline at PAL can supply ultrafast and intense fs-THz radiation from 75 MeV linac (linear accelerator). The radiation covers up to 3 THz (~100 cm-1) and the pulse width is less than 200 fs. This intense THz source has a great potential for applications in nonlinear optical phenomena as well as material science, nano science, biomedical science, chemistry, physics, imaging, etc.