Relevant bibliographies by topics / Low power excitation source

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Academic literature on the topic 'Low power excitation source'

Author: Grafiati
Published: 6 September 2023

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Journal articles on the topic "Low power excitation source"

1

Wang, Yong Qing, Na Chong, Li Mei Dong, Yu Jun Tang, and Hai Jun Song. "Study on Electronic Excitation Temperature of Argon Plasma Using Low Pressure Micro-ICP Excitation Source." Advanced Materials Research 383-390 (November 2011): 1844–48. http://dx.doi.org/10.4028/www.scientific.net/amr.383-390.1844.

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Electronic excitation temperature is an important indicator of the spectrometer excitation source. This work experimented self-made micro-ICP excitation spectroscopy based on PCB technology, and detected 17 spectral lines in 690~860 nm of argon atom. 763.51 nm and 772.42 nm spectral lines whose wavelengths are close to were used to calculate electronic excitation temperature of argon excited by micro-ICP, and results show in 1600~3000 K. Experimental test data shows effects of argon gas pressure on electronic excitation temperature that in 20~210 Pa electronic excitation temperature increases with pressure on the whole. When argon pressure is greater than 220 Pa, plasma flame flickers and the electronic excitation temperature shows greater fluctuation; Experimental test shows effects of RF power on electronic excitation temperature that in 3~23 W electronic excitation temperature gradually increases with RF power. Causes of electronic excitation temperature with pressure, RF power variation are analyzed.
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2

Allen, G. Mark, and David M. Coleman. "Characterization of a Dual Inductively Coupled Plasma Atomic Emission Source." Applied Spectroscopy 41, no. 3 (1987): 381–87. http://dx.doi.org/10.1366/0003702874449039.

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A dual inductively copuled plasma atomic emission spectroscopic system is described. This new analytical discharge segregates the normally integrated processes of sampling and spectral excitation associated with atomic emission sources. A low-power, low-argon-flow, radio-frequency plasma is used as a sampling device to create gaseous species from liquid and solid samples which are subsequently transported to a second plasma for excitation. Design and construction of instrumentation and associated operational parameters are reviewed. Comparisons of the sampling and the excitation plasmas include spatial emission profiles, linear calibration plots, signal-to-background ratios, and analytical detection limits. Use of the dual ICP for direct analysis of particulates (coal fly ash and firebrick) is demonstrated.
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3

Abolmasov, P. K., S. N. Fabrika, and O. N. Sholukhova. "The optical counterpart of the ultraluminous X-ray source NGC6946 ULX-1." Proceedings of the International Astronomical Union 2, S238 (2006): 229–32. http://dx.doi.org/10.1017/s1743921307005029.

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AbstractWe present a study of a peculiar nebula MF16 associated with an Ultraluminous X-ray Source NGC6946 ULX-1. We use integral-field and long-slit spectral data obtained with the 6-m telescope (Russia). The nebula was for a long time considered powered by strong shocks enhancing both high-excitation and low-excitation lines. However, kinematical properties point to rather moderate expansion rates (VS ∼ 100÷200 km s−1). The total power of the emission-line source exceeds by one or two orders of magnitude the power observed expansion rate can provide, that points towards the existence of an additional source of excitation and ionization. Using CLOUDY96.01 photoionization code we derive the properties of the photoionizing source. Its total UV/EUV luminosity must be about 1040 erg/s.
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4

Zhou, Fen Ping, Yang Jiao, and Hui Juan Duan. "Design of Excitation Source for Ultrasonic Guided Waves Based on DDS Technology." Advanced Materials Research 1049-1050 (October 2014): 674–77. http://dx.doi.org/10.4028/www.scientific.net/amr.1049-1050.674.

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According to the characteristics of ultrasonic guided wave inspection, An exciting power, used for exciting ultrasonic guided waves in pipeline is designed based on DDS and FPGA. The excitation source consists of FPGA, D/A conversion circuit, a low-pass filter circuit and power amplifier circuit. Constructing DDS based on FPGA as the controller and signal generator. Filter circuit and power amplifier circuit are designed in this paper. The experiment results show that the excitation source can have high voltage and high frequency output capability, and can generate desired signal type with a good accuracy to fit the requirements in practice. It can be conveniently used for pipeline ultrasonic guided wave detection.
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5

Leonard, James D., Gen Katagiri, and Terry L. Gustafson. "Quasi-Continuous Generation of 211-nm Excitation for Resonance Raman Spectroscopy." Applied Spectroscopy 48, no. 4 (1994): 489–92. http://dx.doi.org/10.1366/000370294775268901.

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We demonstrate the generation of 211-nm radiation using sum frequency mixing of the second and third harmonics of a cw mode-locked Nd: YLF laser operating at 76 MHz as an excitation source for resonance Raman spectroscopy. Owing to the relatively low peak power (∼4 W) but high average power (∼8 mW), we obtain good-quality spectra with relatively short collection times. In order to demonstrate the utility of this source, we have obtained the Raman spectra of several biological molecules and an inorganic molecule, ruthenium trisbipyridine, using 211-nm excitation.
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6

Wang, Yong Qing, Na Chong, Rong Xia Sun, Ying Chang Zhou, and Wen Jun Chen. "Study on Start Burning Performance of Micro-ICP Using Stereo Spiral Coil." Advanced Materials Research 383-390 (November 2011): 390–94. http://dx.doi.org/10.4028/www.scientific.net/amr.383-390.390.

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According to the problem of low energy utilization of plane spiral coil used in micro-ICP, a kind of micro stereo helical coil was designed. Made 24 different structural parameters of stereo spiral coil whose diameter range 3~10 mm. Using comprehensive experimental method tested different parameters’ coils inspire argon plasma. In 13.56MHz RF power, relationships between argon pressure, coil turns, coil diameter and combustion /maintaining power of micro-ICP excitation source were tested. From spectrometer observed 17 argon emission spectrum in 690~860 nm. Spectral lines intensity influenced by RF power and work pressure. Experiments proved that micro-ICP excitation source using stereo helical coil is feasible. It can form Ar plasma and inspire Ar spectral lines.
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7

Xie, Xinying, Kaiqi Chen, Zhichao Zhou, et al. "P‐1.4: Oxygen‐Plasma Induced Generation of Mobile Charge Carriers in Indium‐Tin‐Zinc Oxide." SID Symposium Digest of Technical Papers 54, S1 (2023): 448–50. http://dx.doi.org/10.1002/sdtp.16328.

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Mobile charge carriers can be generated in indium‐tinzinc oxide (ITZO) covered with a silicon oxide layer when subjected to an oxygen plasma treatment. The resulting ‍resistivity is sensitive to the thickness of the cover oxide, the plasma excitation power, and the treatment time. With 280 ‍nm of cover oxide and 10 mins of treatment, a low resistivity of 1.2 mΩ∙cm can be obtained in a plasma biased ‍with a radio frequency excitation power of 100 W and an inductively coupled plasma excitation power of 2000 W. ‍The treatment has been deployed to form the source/drain regions of a self‐aligned, top‐gate ITZO thin‐film ‍transistor.
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8

Deng, Yujia, Wen Zeng, Xiaoming Jiang, and Xiandeng Hou. "Portable photochemical vapor generation-microwave plasma optical emission spectrometer." Journal of Analytical Atomic Spectrometry 35, no. 7 (2020): 1316–19. http://dx.doi.org/10.1039/d0ja00104j.

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A low power microwave plasma torch as an excitation source was combined with a photochemical vapor generator (PVG) and a miniaturized charge-coupled device to construct a portable optical emission spectrometer.
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9

Higashino, Kohta, Naoki Okamura, Teruyoshi Sasayama, and Takashi Yoshida. "Application of square-wave inverter in excitation system for magnetic nanoparticle tomography." AIP Advances 12, no. 3 (2022): 035012. http://dx.doi.org/10.1063/9.0000266.

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To collect the signals of magnetic nanoparticles (MNPs) at a distance from a magnetic nanoparticle tomography, a strong ac magnetic field should be generated by applying a high current to the excitation coil. To this end, sinusoidal excitation using a linear amplifier-type ac power source has been applied to the tomography. Although this source can provide a high-quality sinusoidal voltage, its low power efficiency is not suitable for generating the required high current. To overcome this limitation, we use an H-bridge voltage source inverter to achieve high efficiency by generating a square-wave voltage. However, the third harmonic component in the square wave, undermines the acquisition of MNP signals. Thus, we suppress the third harmonic by shifting the switching phase of the inverter transistors. As a result, the third harmonic in the excitation current is reduced to less than one-tenth of that obtained after conventional suppression. We verify the distribution of MNP signals at depths up to 50 mm using the proposed excitation approach. The results demonstrate the effectiveness of the proposed approach based on square-wave inverter excitation for magnetic nanoparticle tomography.
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10

Bodduluri, Mani Teja, Torben Dankwort, Thomas Lisec, et al. "Fully Integrated High-Performance MEMS Energy Harvester for Mechanical and Contactless Magnetic Excitation in Resonance and at Low Frequencies." Micromachines 13, no. 6 (2022): 863. http://dx.doi.org/10.3390/mi13060863.

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Energy harvesting and storage is highly demanded to enhance the lifetime of autonomous systems, such as IoT sensor nodes, avoiding costly and time-consuming battery replacement. However, cost efficient and small-scale energy harvesting systems with reasonable power output are still subjects of current development. In this work, we present a mechanically and magnetically excitable MEMS vibrational piezoelectric energy harvester featuring wafer-level integrated rare-earth micromagnets. The latter enable harvesting of energy efficiently both in resonance and from low-g, low-frequency mechanical energy sources. Under rotational magnetic excitation at frequencies below 50 Hz, RMS power output up to 74.11 µW is demonstrated in frequency up-conversion. Magnetic excitation in resonance results in open-circuit voltages > 9 V and RMS power output up to 139.39 µW. For purely mechanical excitation, the powder-based integration process allows the realization of high-density and thus compact proof masses in the cantilever design. Accordingly, the device achieves 24.75 µW power output under mechanical excitation of 0.75 g at resonance. The ability to load a capacitance of 2.8 µF at 2.5 V within 30 s is demonstrated, facilitating a custom design low-power ASIC.
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