Multi-channel optical pyrometer for sub-nanosecond temperature measurements at NDCX-I/II
P. A. Ni, F. M. Bieniosek and W. L. Waldron
We present a detailed technical description of a fast multi-channel pyrometer designed for warm-dense-matter (WDM) experiments with intense heavy ion beams at the neutralized-drift-compression-experiment linear accelerator (NDCX-I/II) at Lawrence Berkeley National Laboratory (LBNL). The unique features of the described instrument are its sub-nanosecond temporal resolution (100 ps rise -time) and a broad range, 1,500 K – 12,000 K of measurable brightness temperatures in the visible and near-infrared regions of the spectrum. The working scheme, calibration procedure, experimental data obtained with the pyrometer and future applications are presented.
Keywords: Pyrometer, warm-dense-matter, temperature measurement.