A5059819171- Gyrotron and Vacuum Electronics Research
- Particle accelerators and beam dynamics
- Magnetic confinement fusion research
- Pulsed Power Technology Applications
- Particle Accelerators and Free-Electron Lasers
- Microwave Engineering and Waveguides
- Photonic and Optical Devices
- Terahertz technology and applications
- Acoustic Wave Resonator Technologies
- Superconducting Materials and Applications
- Geophysics and Sensor Technology
- Advanced Research in Systems and Signal Processing
- Optical Coatings and Gratings
- Laser Design and Applications
- RNA Interference and Gene Delivery
- Plasma Diagnostics and Applications
- Advanced Fiber Laser Technologies
- Radio Frequency Integrated Circuit Design
- Advanced Photonic Communication Systems
- Advanced ceramic materials synthesis
- Photonic Crystals and Applications
- Photorefractive and Nonlinear Optics
- Electron and X-Ray Spectroscopy Techniques
- Magneto-Optical Properties and Applications
- Electromagnetic Effects on Materials
Institute of Applied Physics
2011-2024
Russian Academy of Sciences
2007-2024
Far Eastern Federal University
2023
A.M. Obukhov Institute of Atmospheric Physics
2011
A 20 kW gyrotron-driver has been used to control the RF generation of a 170 GHz/1 MW ITER prototype gyrotron. The frequency-locked operation regime obtained, accompanied by an increase in power and efficiency as well stabilization frequency slave MW-level tube.
We discovered a specific property of the eigenmodes cylindrical waveguide, due to which efficient mode excitation at ultrahigh ($s=4n+1,$ $n$ is integer) multiples gyrofrequency can be provided by polyhelical weakly relativistic electron beam, standardly used for gyrotron operation. In proof-of-principle experiment with V-band driven 25-keV, 2-A about 100 mW radiation power fifth cyclotron harmonic (0.22 THz) has been detected in cw regime. Based on theory, we demonstrate simulations that,...
RF systems in the ion cyclotron resonance frequency (ICRF) range and electron (ECRF) are an advanced stage of commissioning, to carry out pre-ionization, breakdown, heating current drive experiments on steady-state superconducting tokamak SST-1. Initially 1.5 MW continuous wave ICRF system would be used heat SST-1 plasma 1.0 keV during a pulse length 1000 s. For different scenarios at 3.0 T, wide band operating frequencies (20–92 MHz) is required. To meet this requirement two CW rf...
A 45-GHz gyrotron-based microwave oscillator setup has been purposefully developed for powering of a superconducting electron cyclotron resonance (ECR) ion source. The provides smoothly regulated output power in the 0.1–20-kW range (up to 26 kW manual mode) with an efficiency up 50% and collector depression both continuous wave (CW) pulse modes. Pulse mode specifications: duration 5–200 ms, leading edge less than <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML"...
The 42-GHz electron cyclotron resonance heating (ECRH) system on SST-1 is used to carry out ECRH-assisted preionization, breakdown, start-up, and experiments at 0.75-T (second harmonic) 1.5-T (fundamental operation. gyrotron delivers 500-kW power frequency −50-kV beam voltage, 20-A current, 19-kV anode voltage. has been commissioned successfully dummy load for full parameters (500 kW/500 ms). transmission line consists of matching optic unit, circular corrugated waveguide, miter bend with...
Electron Cyclotron Resonance Heating (ECRH) system will play an important role in plasma formation, heating and current drive the Superconducting Steady state Tokamak (SST-1). Commissioning activity of machine has been initiated. Many sub-systems have prepared for first discharge. A radial a top port allotted low field side (LFS) high (HFS) launch O X- modes plasma.
We study a technique for diagnostics of the loss tangent inhomogeneity in semi-insulating gallium arsenide within frequency band 0.3 THz and higher. The low-oversize-factor resonator recently developed optical switch formed by an intersection single-mode waveguide cutoff presence semiconductor is used to analyze small fragments movable test wafer. obtained spatial resolution (0.1 mm2) much higher than that known methods. results using finite difference time domain theory synthesis optimal...
High-power tests on chemical vapor deposited (CVD) diamond window are carried out using 82.6-GHz Gyrotron. To test CVD with calorimetric dummy load, a matching optic unit is designed and fabricated special profiled mirrors. The mirrors by Gycom Russia mirror box assembly at Institute for Plasma Research. cooled water. consists of four arc detectors the protection window. connected to load this box. alignment done during testing in pulsed condition. After achieving desired Gaussian pattern...
A new type of electron cyclotron resonance (ECR) ion sources – a gasdynamic ECR source was invented recently at the Institute Applied Physics (IAP RAS, Nizhniy Novgorod, Russia). The main advantages such devices are extremely high beam current with density up to 600 700 mA/cm2 in combination low emittance i.e. normalized RMS below 0.1 π·mm·mrad. part previous experiments were carried out pulsed operation mode. Preliminary studies plasma parameters performed using continuous wave (CW) 24...
This paper describes gyrotron-based setup developed by Gycom Ltd. jointly with IAP RAS and intended for use in superconducting ECR ion source FECRAL (a Fourth generation Advanced design Lanzhou, China) [1]. The is capable to provide output power up 20 kW both CW pulse (5–200 ms duration less than 10 μs fall time 5 Hz repetition rate) modes 45 GHz frequency.
Using the technology of photopolymer three-dimensional printing with subsequent metallization, a prototype slow-wave system for Q-band traveling wave lamp was manufactured. The deviations in size one period detected on measuring microscope did not exceed 5 μm. results “cold” electrodynamic measurements manufactured demonstrated good agreement calculated data.
Chitosan is a natural polymer that often used in nanotechnology because it has such useful properties as biodegradability and biocompatibility. many benefits, but they are outweighed by drawbacks insolubility, aggregation at physiological pH, insufficient cargo release the cytosol. In order to obtain chitosan nanoparticles can be drug delivery systems, we optimized synthesis technology selecting MES buffer pH 6.3 using BSA coating step reduce nanoparticle aggregation. Deposition of...
Efforts are underway within the accelerator community to develop high-gradient RF accelerators using microwave sources at relatively high frequencies (in particular, 34.272 GHz). Yet no corresponding high-power components providing pulse compression, transmission and input coupling accelerating structure currently available. Results of investigations many including resonator passive compressor, controllable launcher for a DLDS system, low-loss miter bends, mode converters, presented.
The 42GHz ECRH system on SST-1 will be used for assisted pre-ionization, startup and heating experiments at 0.75T (second harmonic) 1.5T (fundamental operation. Gyrotron delivers 500kW power frequency -50kV beam voltage, 20A current +19kV anode voltage. has been tested successfully dummy load full parameters. good gaussian burn pattern the exit of matching optic unit ensures required mode purity. circular corrugated waveguide based transmission line consists unit, mitre-bend with...
We discuss an opportunity of active compressor to reach gigawatt power in nanosecond pulses compressing microsecond pulsed gyrotron radiation a terahertz band. The is based on classic three-mirror circular scheme with switching element plain gallium arsenide driven by picosecond optical laser pulse. input from introduced corrugated coupling mirror. A dummy load absorbs the spurious spatial harmonics. While idea reaching compression ratio over 100, i.e. sub-gigawatt and even peak output...
This paper describes gyrotron-based microwave generator setup developed by IAP RAS jointly with GYCOM Ltd. and intended for use in superconducting ECR ion source FECRAL (a Fourth generation Advanced design Lanzhou, China) [1, 2]. The is capable to provide output power up 20 kW both CW pulse (5-200 ms duration less than 1 μs fall time 10 Hz repetition rate) operation modes 45 GHz frequency. system includes quasioptical transmission line mode converter from the Gaussian beam TE01 or HE11 (at...