Application of Thyristor AC Voltage Regulation Technology in ICP Spectrum Excitation Source
SCM control technology be applied to inductively coupled plasma excitation source in this paper. Through controlling thyristor trigger angle control AC voltage regulation, the go through step-up circuit to achieve output power continuously adjustable. It introduces construction and work principle. Grating spectrograph is co-operated with thyristor AC voltage ICP excitation source for performance tested. By means of Ar355.431nm tested power stability≤0.5%. Testing Fe, Cu, Au and other elements shows that the detection limit is 10-9g/ml, precision relative standard deviation RSD≤ 3％. Results show that this voltage regulation technology is stable, reduces the instrument’s size and operates conveniently. It is suitable for ICP excitation source in spectroscopic analysis.
Y. C. Zhou et al., "Application of Thyristor AC Voltage Regulation Technology in ICP Spectrum Excitation Source", Advanced Materials Research, Vols. 383-390, pp. 6010-6013, 2012