Optical spectrometry in the diagnosis of ion‐plasma processes

Kostrin, D. K.; Uhov, A. A.; Lisenkov, A. A.

doi:10.1002/vipr.201600608

Cited by 20 publications

(5 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In this case, the influence of pulse frequency on the spectrum curves, as well as the presence of obvious impurities (potassium permanganate in particular) was considered. The spectrometer ISM3600 [6,7] with 2 s accumulation time setting was used. The software processing of the obtained spectra was carried out with the ASpect2010 software [8].…”

Section: Application Of the Glow Discharge Control Device In The Expementioning

confidence: 99%

Development of a device for monitoring gas discharge parameters in a system with boiling liquid in a channel

Ramazanov

Kostrin

Simon

2018

IOP Conf. Ser.: Mater. Sci. Eng.

View full text Add to dashboard Cite

Abstract. Experimental prototypes of the high-voltage power sources for initialization of a gas discharge in the channel with boiling liquid are designed. The development principle of the device for control of the discharge system parameters is presented. The emission characteristics of a gas discharge at different frequencies are given. IntroductionToday there is an intensive development of devices for water composition analysis [1]. Designed devices vary in the studied parameters, dimensions and price. Special attention is paid to a compact device capable of analyzing an aqueous solution sample in the field conditions. The gas discharge at atmospheric pressure is often used for this purpose [2,3]. This type of discharge has high temperature and pressure plasma, which serves as a high brightness light source. If liquid is placed between the electrodes and the discharge is initiated, the spectral lines of chemical elements which salts are dissolved in the liquid will arise in the spectrogram, saying about the qualitative composition of the analyte under study [4,5].In this regard, when creating devices for gas discharge initialization in the field conditions, a number of problems should be solved, related not only to the choice of the discharge cell, but also to the development of an electrical circuit for excitation and control of discharge parameters. Currently there are a number of systems that are intensively used to maintain the gas discharge at atmospheric pressure that do not require high voltages and frequencies of the power source. There are three types of these devices of frequent occurrence: a system with a liquid electrode, a system with a liquid supply and a system with boiling liquid in a channel. Each of them has a number of advantages and disadvantages. The system with liquid supply is used in industrial enterprises, has a complex structure and is inefficient in the analysis for small samples. The system with a liquid electrode has simple structure, but it is quite difficult to ensure the safety of the spectral lines registration in this case, because the optical fiber should be placed quite close to the discharge arc. The most safe and easy to use is a system with boiling in the channel which is shown in figure 1. The electrodes 2 are located in the vessels 1, interconnected by a quartz glass capillary 3.To excite and maintain the gas discharge in this system the high-voltage pulse power sources capable of providing the output voltage up to 5 kV and pulse repetition rate in the range from 15 to 50 kHz should be used. These settings should be maintained in the specified ranges to ensure optimal initialization conditions in a portable device. In order to simplify the actions of the intended user, the

show abstract

Section: Application Of the Glow Discharge Control Device In The Expementioning

confidence: 99%

Development of a device for monitoring gas discharge parameters in a system with boiling liquid in a channel

Ramazanov

Kostrin

Simon

2018

IOP Conf. Ser.: Mater. Sci. Eng.

View full text Add to dashboard Cite

show abstract

“…In addition, this method gives the average value of the coating thickness across the object. Also only for dielectric and semiconductor films can be applied becoming increasingly common spectrometric measurement method [10,11].…”

Section: Related Contentmentioning

confidence: 99%

Thickness measurements of coatings formed from metal plasma of a vacuum arc discharge using X-ray radiation

Lisenkov

Martsinukov

Chernigovskiy

et al. 2017

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

Thickness measurement in a horizontal liquid layer when heated from a localized hot-spot S E Spesivtsev, Yu V Lyulin, I V Marchuk et al. Thickness measurements of coatings formed from metal plasma of a vacuum arc discharge using X-ray radiation Abstract. Using vacuum arc plasma sources allows obtaining coatings with broad spectrum of functional properties. The main problem is to control the thickness of a formed coating. This paper shows the possibility of using X-ray radiation to determine the coating thickness.Currently a wide range of various by composition coatings deposited from metal plasma of a vacuum arc discharge is developed and applied [1,2]. Universal properties of the formed coatings allow their use in various branches of engineering to improve wear resistance, reduce coefficient of friction and provide protection from corrosion [3,4]. To meet market requirements the coating must provide a sufficient hardness, low friction coefficient and high thermal stability. The solution to this problem is achieved either by the development of new coating formulations with enhanced performance properties, or by developing new methods of coating deposition to improve the coating quality and increase the speed of its formation. To achieve this goal vacuum arc plasma sources are very widely used [5]. Modifying parameters of a generated flux of metal plasma, the pressure of the reaction gas and the magnitude of the accompanying magnetic field, it is possible to control the properties of condensate and to obtain the necessary coating quality. In vacuum arc plasma sources with coaxial design of the electrodes the cathode is made in a form of a cylinder or truncated cone, the working surface in this case is the side with the smallest area S c (figure 1). Section of the cathode opposite to its working surface is cooled with running water. Continuous chaotic movement of cathode spots at a fixed surface of the cathode [6], regardless of the initial distribution, leads to some average equilibrium temperature of the surface, determined by the geometrical dimensions of the cathode: the diameter and length, and conditions of its cooling.Diameter of the working surface of the cathode may be as much as 200 mm. Geometric dimensions are selected to provide lowest average operating temperature of the cathode. During the work of the source due to erosion of the material the length of the cathode decreases (figure 1) that leads to a decrease in temperature of the cathode and to changes in the conditions of plasma flow formation.Thus, the temperature of the cathode is the main factor determining modes of generation of the plasma flux, and therefore, even providing the stabilization of the discharge parameters, as the cathode is sputtered, there are significant changes in it leading to deviations of thickness of the formed coatings. In batch deposition of coatings these conditions require adjustments to the process.

show abstract

“…For the determination of the plasma flux composition an emission spectral analyzer on the basis of a modernized one dimensional CCD array Toshiba TCD1304 with 3648 pixels (8×200 μm) was used [10][11][12]. The investigated range of wavelengths of the plasma was 350…950 nm (optical resolution of the spectrometer is 1 nm).…”

Section: Spectral Analysis Of the Charge And Elemental Composition Ofmentioning

confidence: 99%

Spectral analysis of the charge and elemental composition of the vacuum arc discharge plasma flux during deposition of carbon coatings

Kostrin

Trifonov

Lisenkov

2017

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

Optical spectrometry in the diagnosis of ion‐plasma processes

Cited by 20 publications

References 3 publications

Development of a device for monitoring gas discharge parameters in a system with boiling liquid in a channel

Development of a device for monitoring gas discharge parameters in a system with boiling liquid in a channel

Thickness measurements of coatings formed from metal plasma of a vacuum arc discharge using X-ray radiation

Spectral analysis of the charge and elemental composition of the vacuum arc discharge plasma flux during deposition of carbon coatings

Contact Info

Product

Resources

About