GYCOM Ltd.

Nizhniy Novgorod, Russia

GYCOM Ltd.

Nizhniy Novgorod, Russia
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Denisov G.,Institute of Applied Physics | Kazansky I.,Gycom Ltd | Malygin V.,Institute of Applied Physics | Soluyanova E.,Gycom Ltd | And 2 more authors.
EPJ Web of Conferences | Year: 2017

GYCOM in collaboration with Institute of Applied Physics (IAP) designed, fabricated and tested two different gyrotrons with similar to ITER parameters at 105-140 GHz frequency range. Set of gyrotron system beside the tube includes matching optic unit (MOU) and elements of evacuated transmission lines. One gyrotron system was installed and operates at plasma machines EAST/ASIPP/China, another system is delivered to KSTAR/NFRI/Korea. © 2017 The Authors.


Kharchev N.K.,RAS A.M. Prokhorov General Physics Institute | Batanov G.M.,RAS A.M. Prokhorov General Physics Institute | Kolik L.V.,RAS A.M. Prokhorov General Physics Institute | Malakhov D.V.,RAS A.M. Prokhorov General Physics Institute | And 7 more authors.
Review of Scientific Instruments | Year: 2013

Results are presented for measurements of microwave power of the Borets-75/0.8 gyrotron with recovery of residual electron energy, which were performed by a flow-type calorimeter. This gyrotron is a part of the ECR plasma heating complex put into operation in 2010 at the L-2M stellarator. The new calorimeter is capable of measuring microwave power up to 0.5 MW. Monitoring of the microwave power makes it possible to control the parameters of the gyrotron power supply unit (its voltage and current) and the magnetic field of the cryomagnet in order to optimize the gyrotron operation and arrive at maximum efficiency. © 2013 American Institute of Physics.


Glyavin M.Y.,RAS Institute of Applied Physics | Chirkov A.V.,RAS Institute of Applied Physics | Denisov G.G.,RAS Institute of Applied Physics | Fokin A.P.,RAS Institute of Applied Physics | And 13 more authors.
Review of Scientific Instruments | Year: 2015

A 263 GHz continuous-wave (CW) gyrotron was developed at the IAP RAS for future applications as a microwave power source in Dynamic Nuclear Polarization / Nuclear magnetic resonance (DNP/NMR) spectrometers. A new experimental facility with a computerized control was built to test this and subsequent gyrotrons. We obtained the maximum CW power up to 1 kW in the 15 kV/0.4 A operation regime. The power about 10 W, which is sufficient for many spectroscopic applications, was realized in the low current 14 kV/0.02 A regime. The possibility of frequency tuning by variation of the coolant temperature about 4 MHz/1 °C was demonstrated. The spectral width of the gyrotron radiation was about 10-6. © 2015 AIP Publishing LLC.


Litvak A.G.,RAS Institute of Applied Physics | Denisov G.G.,RAS Institute of Applied Physics | Myasnikov V.E.,RAS Institute of Applied Physics | Tai E.M.,GYCOM Ltd. | And 2 more authors.
EPJ Web of Conferences | Year: 2012

Regime with 1000-s pulse duration at 1MW output power and efficiency ~53% has been implemented in the ITER gyrotron prototype. Upgrade of few gyrotron units was undertaken to increase its operation reliability. New gyrotron prototype equipped with modernized units will be manufactured in summer and its test will start in autumn 2012. Interfaces between a gyrotron and an equipment which is to be delivered as its integrated package from one side and ITER systems and services from another side are now main subject of discussion with IO team. Manufacturing and testing of the multi-frequency gyrotron for ASDEX Upgrade with new tunable window is in progress. Short pulse (0.1 sec) tests showed good operation at 4 frequencies. Gaussian mode content in the output wave beam is high. Ceramics window used for the short pulse tests was replaced to the diamond window. In 3 second pulses the gyrotron showed 0.9 MW at 140 GHz and 0.8 MW at 105 GHz. Gyrotron conditioning will be continued in July 2012. © Owned by the authors, published by EDP Sciences, 2012.


Litvak A.G.,RAS Institute of Applied Physics | Denisov G.G.,RAS Institute of Applied Physics | Myasnikov V.E.,GYCOM Ltd. | Tai E.M.,GYCOM Ltd. | And 2 more authors.
International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz | Year: 2013

During last year several new steps in gyrotrons development have been done at IAP/GYCOM. The main ITER requirements to a gyrotron have been demonstrated: 170 GHz frequency, 1MW power, 1000 seconds pulse duration, 53% efficiency. The operation regime of 1.2 MW was found for 100 second pulses. For a multi-frequency gyrotron a novel scheme for a tuneable window was developed. Additionally some other new gyrotrons were shipped and installed at running plasma installations. © 2013 IEEE.


Zaitsev N.I.,RAS Institute of Applied Physics | Guznov Y.M.,RAS Institute of Applied Physics | Kuzikov S.V.,RAS Institute of Applied Physics | Plotkin M.E.,RAS Institute of Applied Physics | And 2 more authors.
Radiophysics and Quantum Electronics | Year: 2014

We present the results of experimental studies of the gyroklystron with cavities operated with the sequence of TE7.1.1 - TE 7.3.1 volume modes and a radiation frequency of 35.4 GHz. At an accelerating voltage of 320 kV, we obtained an output radiation power of 15 MW for an efficiency over 30%, an amplification coefficient of 30 dB, an amplification band of 50 MHz, and a microwave pulse duration of 0.5 μs. © 2014 Springer Science+Business Media New York.


Denisov G.G.,RAS Institute of Applied Physics | Chirkov A.V.,RAS Institute of Applied Physics | Belousov V.I.,RAS Institute of Applied Physics | Bogdashov A.A.,RAS Institute of Applied Physics | And 11 more authors.
Journal of Infrared, Millimeter, and Terahertz Waves | Year: 2011

The present paper reports on the recent development of several oversized millimeter wave transmission line components for different applications. The studies include a circular TE 11-to-Gaussian beam mode converting horn, a TM 01-to-rotating TE 31 mode converter, a TE 11-mode 90° bend, a series of different HE 11-mode transmission line components, a notch filter and a fast laser controlled semiconductor microwave switch. © 2011 Springer Science+Business Media, LLC.


Litvak A.G.,RAS Institute of Applied Physics | Denisov G.G.,RAS Institute of Applied Physics | Myasnikov V.E.,GYCOM Ltd. | Tai E.M.,GYCOM Ltd. | And 2 more authors.
Journal of Infrared, Millimeter, and Terahertz Waves | Year: 2011

Tests of the Russian ITER gyrotrons were continued after debugging of the test facility at Kurchatov Institute including the evacuated transmission line and power supplies capable to provide gyrotron CW operation. A new ITER gyrotron (V-10) with upgraded body insulation, liquid cooling system for the DC-break ceramic and improved design of the relief window has been manufactured and is currently under test. A maximal total efficiency near 55% at 1 MW power level was attained. The maximal pulse duration of 1000 s at 0.8 MW power was limited at that time by the test stand. At 1 MW power level the gyrotron V-10 up to now reached a pulse duration of 570 s. An advanced short-pulse (100 ms) gyrotron model operating in the TE 28.12 mode demonstrated a very robust operation at relatively high electron energies (up to 100 keV) necessary to achieve 1.5-2 MW output power. Three double frequency gyrotrons have been delivered to ASDEX Upgrade. The development of a multi-frequency gyrotron with a broadband or tuneable synthetic diamond window is in progress. © 2011 Springer Science+Business Media, LLC.


Bogdashov A.A.,Institute of Applied Physics | Belousov V.I.,Institute of Applied Physics | Chirkov A.V.,Institute of Applied Physics | Denisov G.G.,Institute of Applied Physics | And 3 more authors.
Journal of Infrared, Millimeter, and Terahertz Waves | Year: 2011

We describe the design and test results of the transmission line for liquid-state (LS) and solid-state (SS) DNP spectrometers with the second-harmonic 258.6 GHz gyrotron at the Institute of the Biophysical Chemistry Center of Goethe University (Frankfurt). The 13-meter line includes a mode converter, HE11 waveguides, 4 mitre bends, a variable polarizer-attenuator, directional couplers, a water-flow calorimeter and a mechanical switch. A microwave power of about 15 W was obtained in the pure HE11 mode at the spectrometer inputs. © 2011 Springer Science+Business Media, LLC.


PubMed | Gycom Ltd. and RAS Institute of Applied Physics
Type: Journal Article | Journal: The Review of scientific instruments | Year: 2015

A 263 GHz continuous-wave (CW) gyrotron was developed at the IAP RAS for future applications as a microwave power source in Dynamic Nuclear Polarization / Nuclear magnetic resonance (DNP/NMR) spectrometers. A new experimental facility with a computerized control was built to test this and subsequent gyrotrons. We obtained the maximum CW power up to 1 kW in the 15 kV/0.4 A operation regime. The power about 10 W, which is sufficient for many spectroscopic applications, was realized in the low current 14 kV/0.02 A regime. The possibility of frequency tuning by variation of the coolant temperature about 4 MHz/1C was demonstrated. The spectral width of the gyrotron radiation was about 10(-6).

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