Nickel sulfate doped triglycine sulfate crystals have been grown by natural evaporation method. The chemical composition of the pure triglycine sulfate crystals and the presence of nickel ion in doped triglycine sulfa...Nickel sulfate doped triglycine sulfate crystals have been grown by natural evaporation method. The chemical composition of the pure triglycine sulfate crystals and the presence of nickel ion in doped triglycine sulfate crystal were confirmed by Energy Dispersive X-ray analysis. The functional groups of the grown crystals have been identified by the Fourier Transform Infrared spectroscopy. The structural studies on the grown crystals were carried out by X-ray Diffraction analysis. All the grown crystals are found in monoclinic structure and the lattice parameters of pure TGS crystal are a = 9.6010 ?, b = 12.5600 ? and c = 5.4500 ?. The lattice parameters are slightly distorted due to the incorporation of nickel ion into the lattice sites of the TGS crystal.展开更多
Triglycine sulfate crystal and potassium bromide doped triglycine sulfate crystals were grown from aqueous solution by slow evaporation method. Energy dispersive X-ray analysis identifies the elements present in the c...Triglycine sulfate crystal and potassium bromide doped triglycine sulfate crystals were grown from aqueous solution by slow evaporation method. Energy dispersive X-ray analysis identifies the elements present in the crystal. The Fourier Transform Infrared spectroscopy has been recorded in the range 400 to 4000 cm-1 and the functional groups of the grown crystals have been identified. The structural studies on the grown crystals were carried out by X-ray diffraction analysis technique and found that the grown crystal crystallizes in monoclinic structure. The lattice cell parameters of pure Triglycine sulfate are a = 9.6010 ?, b = 12.5600 ?, c = 5.4500 ?. Ultraviolet-Visible spectra show that the grown crystals have wide optical transparency in the entire visible region.展开更多
Plasma electron density is one of the most fundamental parameters in the study of tokamak plasma physics.The method of plasma electron density measuring and processing on the Joint Texas Experimental Tokamak(J-TEXT) w...Plasma electron density is one of the most fundamental parameters in the study of tokamak plasma physics.The method of plasma electron density measuring and processing on the Joint Texas Experimental Tokamak(J-TEXT) was presented in this paper.The principle of the plasma electron density measuring by hydrogen cyanide(HCN) laser interferometer was introduced.Room temperature triglycine sulface(TGS) detector was used to obtain the beat signal of HCN,and phase difference was measured by high-speed acquisition card DAQ2010.Based on the signal characteristics,a specific HCN processing algorithm was designed to eliminate the baseline offset accurately and process overturns of HCN signals effectively.As a result,plasma electron density with high accuracy and low noise has been obtained during the J-TEXT tokamak experiment.展开更多
Triglycine sulphate （NH<sub>2</sub>CH<sub>2</sub>COOH）<sub>3</sub>·H<sub>2</sub>SO<sub>4</sub> is a well-known ferroelectric crystal widely used in py...Triglycine sulphate （NH<sub>2</sub>CH<sub>2</sub>COOH）<sub>3</sub>·H<sub>2</sub>SO<sub>4</sub> is a well-known ferroelectric crystal widely used in pyroelectric application. Being monoclinic, its space group is P2<sub>1</sub> and its polarization direction is along the two-fold screw axis. Its Curie temperature （T<sub>c</sub>）is 49℃ and it crystallizes at room temperature. Above 49℃ the spontaneous polarization disappears展开更多
文摘Nickel sulfate doped triglycine sulfate crystals have been grown by natural evaporation method. The chemical composition of the pure triglycine sulfate crystals and the presence of nickel ion in doped triglycine sulfate crystal were confirmed by Energy Dispersive X-ray analysis. The functional groups of the grown crystals have been identified by the Fourier Transform Infrared spectroscopy. The structural studies on the grown crystals were carried out by X-ray Diffraction analysis. All the grown crystals are found in monoclinic structure and the lattice parameters of pure TGS crystal are a = 9.6010 ?, b = 12.5600 ? and c = 5.4500 ?. The lattice parameters are slightly distorted due to the incorporation of nickel ion into the lattice sites of the TGS crystal.
文摘Triglycine sulfate crystal and potassium bromide doped triglycine sulfate crystals were grown from aqueous solution by slow evaporation method. Energy dispersive X-ray analysis identifies the elements present in the crystal. The Fourier Transform Infrared spectroscopy has been recorded in the range 400 to 4000 cm-1 and the functional groups of the grown crystals have been identified. The structural studies on the grown crystals were carried out by X-ray diffraction analysis technique and found that the grown crystal crystallizes in monoclinic structure. The lattice cell parameters of pure Triglycine sulfate are a = 9.6010 ?, b = 12.5600 ?, c = 5.4500 ?. Ultraviolet-Visible spectra show that the grown crystals have wide optical transparency in the entire visible region.
基金Major State Basic Research Development Program of China (program 973,No. 2008CB717807)ITER Program Supporting Research in China (No. 2010GB108004)
文摘Plasma electron density is one of the most fundamental parameters in the study of tokamak plasma physics.The method of plasma electron density measuring and processing on the Joint Texas Experimental Tokamak(J-TEXT) was presented in this paper.The principle of the plasma electron density measuring by hydrogen cyanide(HCN) laser interferometer was introduced.Room temperature triglycine sulface(TGS) detector was used to obtain the beat signal of HCN,and phase difference was measured by high-speed acquisition card DAQ2010.Based on the signal characteristics,a specific HCN processing algorithm was designed to eliminate the baseline offset accurately and process overturns of HCN signals effectively.As a result,plasma electron density with high accuracy and low noise has been obtained during the J-TEXT tokamak experiment.
文摘Triglycine sulphate （NH<sub>2</sub>CH<sub>2</sub>COOH）<sub>3</sub>·H<sub>2</sub>SO<sub>4</sub> is a well-known ferroelectric crystal widely used in pyroelectric application. Being monoclinic, its space group is P2<sub>1</sub> and its polarization direction is along the two-fold screw axis. Its Curie temperature （T<sub>c</sub>）is 49℃ and it crystallizes at room temperature. Above 49℃ the spontaneous polarization disappears
