title: Heating system of pellet samples integrated with terahertz spectrometer.
abstract: This article describes automation of temperature-dependent terahertz spectroscopic experiments. The proposed dual-heater temperature controller based on a cascade proportional-integral-derivative algorithm provides smooth temperature changes in the polyethylene-based pharmaceutical pellet samples. The device has been integrated with a terahertz time-domain spectrometer. Thermodynamic experiments can now be performed without any probe inserted into the measured sample. Selected results of temperature-induced evolution in terahertz spectra are presented.
authors.affiliation: Department of Electronics, Wroclaw University of Technology, 27 Wybrzeze Wyspianskiego St., 50-370 Wroclaw, Poland.
authors.forename: L A
authors.initials: LA
authors.lastname: Sterczewski
authors.affiliation: Department of Electronics, Wroclaw University of Technology, 27 Wybrzeze Wyspianskiego St., 50-370 Wroclaw, Poland.
authors.forename: M P
authors.initials: MP
authors.lastname: Grzelczak
authors.affiliation: Department of Electronics, Wroclaw University of Technology, 27 Wybrzeze Wyspianskiego St., 50-370 Wroclaw, Poland.
authors.forename: E F
authors.initials: EF
authors.lastname: Plinski