High-performance 1-10 THz integrating sphere.

The SPICA far-infrared instrument (SAFARI), one of instruments of the space infrared telescope for cosmology and astrophysics, requires a calibration source assembly to calibrate the transition edge sensor readout circuits. A high-performance integrating sphere working at SAFARI wavelength (34-230 µm) is essential. A novel process for preparing terahertz integrating spheres was developed.