[en] This work describes a pulsed Na atomic beam source developed for spectroscopic diagnosis of a high-power ion diode on the Particle Beam Fusion Accelerator II. The goal is to produce a ∼ 10¹²-cm^-3-density Na atomic beam that can be injected into the diode acceleration gap to measure electric and magnetic fields from the Stark and Zeeman effects through laser-induced-fluorescence or absorption spectroscopy. A ∼ 10 ns fwhm, 1.06 microm, 0.6 J/cm² laser incident through a glass slide heats a Na-bearing thin film, creating a plasma that generates a sodium vapor plume. A ∼ 1 microsec fwhm dye laser beam tuned to 5,890 angstrom is used for absorption measurement of the Na I resonant doublet by viewing parallel to the film surface. The dye laser light is coupled through a fiber to a spectrograph with a time-integrated CCD camera. A two-dimensional mapping of the Na vapor density is obtained through absorption measurements at different spatial locations. Time-of-flight and Doppler broadening of the absorption with ∼ 0.1 angstrom spectral resolution indicate that the Na neutral vapor temperature is about 0.5 to 2 eV. Laser-induced-fluorescence from ∼ 1 x 10¹²-cm^-3 Na I 3s-3p lines observed with a streaked spectrograph provides a signal level sufficient for ∼ 0.06 angstrom wavelength shift measurements in a mock-up of an ion diode experiment