Персона: Губский, Константин Леонидович
Email Address
Birth Date
Результаты поиска
Лазерная анемометрия в исследованиях ударно-волновых процессов и экстремального состояния вещества
3D push–pull heterodyne interferometer for SPM metrology
© 2019 Optical Society of America.A three-coordinate heterodyne laser interferometer has been developed to measure the displacement of the probe microscope scanner with a subnanometer resolution that provides traceability of measurements to the standard of meter through the wavelength of a stabilized He–Ne laser. Main sources of errors are investigated, and their influence is minimized so that the resulting measurement uncertainty of the system does not exceed 0.2 nm, and the resolution is 0.01 nm. The investigation of metrological characteristics of the three-coordinate interferometer was carried out with a scanning probe microscopy (SPM) NanoScan-3D using TGZ-type calibration gratings. The values measured with SPM fell within the 95% confidence interval given by Physikalisch-Technische Bundesanstalt (PTB) (Germany). SPM equipped with a laser interferometer was used to measure the characteristics of dynamic etalons of geometric dimensions.
Analysis of Influence of Seismic Oscillations on Precision Laser Plants' Work
© Published under licence by IOP Publishing Ltd.The seismic situation in a number of rooms of the NRNU MEPhI, including the Laboratory Building, where the construction of the multifunctional laser complex ELF is planned, is studied. Estimations of seismic and vibrational noise at the main and isolated parts of the basement of the room that hosts the laser complex are obtained.
Metrological method for determining the surface area function of the nanohardness testers tips
© Published under licence by IOP Publishing Ltd.The paper describes a method for measuring the surface area function of the tips of the probes of nanohardness testers using a laser interferometer. The features of the developed system provide traceability of measurements to the standard of length through the wavelength of a stabilized source of laser radiation. In addition, it is possible to measure the parameters of the probe tip without removing it from the nanohardness tester, which allows the device not to be taken out of working condition and provides unambiguous measurements.
Use of Direct Optical Heterodyning for Measuring Hardness by the Leeb Method
© 2019, Pleiades Publishing, Ltd.Abstract: In this paper, we describe a portable system for measuring the indenter velocity in hardness meters implemented according to the Leeb method. The developed system is a fiber interferometer, in which a radiation source is a semiconductor laser with a wavelength of 1550 nm. The presented experimental results confirm the ability of the system to measure indenter velocities with an uncertainty of 0.001 m/s, which satisfies the requirements of the standards for this method of measuring hardness.
Multichannel laser radiation collection and transport system for particle velocity measurements in shock wave experiments
© Published under licence by IOP Publishing Ltd.VISAR type measuring laser systems are used for the determination of surface velocities in high-speed processes. Their operational characteristics mostly depends on the efficiency of collection of scattered radiation. In this paper we present results of the comparative analysis of several radiation collection schemes along with experimentally obtained data on the scheme parameters effect on collection efficiency and recording length.
Hybrid interferometer system for velocity measurements
© Published under licence by IOP Publishing Ltd.The first result of the developed hybrid system for measuring the mass velocity of a matter is presented in the article. It combines two methods, VISAR and PDV, to compensate for their shortcomings. The scheme of the measuring system and the results of the laboratory experiment are shown.
Diagnostic system for shock processes investigation in matter under the influence of intense laser pulses
© 2019 Published under licence by IOP Publishing Ltd. The paper presents the diagnostic system for velocity measurements of reflecting objects in high energy physics experiments. The principle of continuous velocity measurements based on the Doppler frequency shift analysis of a probe monochromatic wave reflected by the moving surface of the sample. System is designed to measure velocity in the interval of 5-50 km/s. Powerful laser pulses expose the target and generate shock waves inside it. The back side of target is illuminated by probe laser beam at a wavelength of 660 nm. Scattered probe light collected by a lens and injected into the optical system. Two Mach-Zehnder interferometers with different reference delay etalons form a vernier measuring system. A passive channel records luminescence in the shock wave front. Spatial resolution of the optical layout is about 3 μm.
Two-channel interferometer system of direct optical heterodining for destruction by shock waves processes studying
© Published under licence by IOP Publishing Ltd.The article describes a multichannel modular system for velocity measuremens in shock physics. The two-channel time compression system is based on PDV method. It was tested in lead dusting experiments.
On the proton radiography of magnetic fields in targets irradiated by intense picosecond laser pulses
© Published under licence by IOP Publishing Ltd.Proton radiography is a common diagnostic technique in laser-driven magnetic field generation studies. It is based on measuring proton beam deflection in electromagnetic fields induced around the target with the help of radiochromic film stacks. Unraveling information recorded in experimental radiographs and extracting the field profiles is not always a straightforward task. In this paper, some aspects of data analysis by reproducing experimental radiographs in numerical simulations are described. The approach allows determining the field strength and structure in the target area for various target geometries.