A Microwave Reflectometry Based On Amplitude Modulation onHT-7 Tokamak B.L.Ling, Institute of Plasma Physics, Chinese Academy of Sciences, P.O.Box 1126,

Slides:

Advertisements

Similar presentations

Chapter Six: Receivers

Advertisements

NSTX Reflectometer Measurements of RF Waves in the Scrape-off Layer in Front of the HHFW Antenna Array J. B. Wilgen, G. R. Hanson, P. M. Ryan, D. W. Swain.

LOGO 10.6-um Laser Scattering from Cyclotron-Harmonic Waves in a Plasma 报告人 : 孙兆轩组员 : 王兴立，曹骑佛，孙兆轩，周凡，魏然，江堤.

Measurement of magnetic island width by using multi-channel ECE radiometer on HT-7 tokamak Han Xiang( 韩翔 ), Ling Bili( 凌必利 ), Gao Xiang( 高翔 ), Liu Yong(

Physics of fusion power Lecture 11: Diagnostics / heating.

ITER reflectometry diagnostics operation limitations caused by strong back and small angle scattering E.Gusakov 1, S. Heuraux 2, A. Popov 1 1 Ioffe Institute,

Technician License Course Chapter 3 Lesson Plan Module 7 – Types of Radio Circuits.

Electricity, Electronics And Ham Radio “Kopertroniks” By Nick Guydosh 4/12/07.

D. Borba 1 21 st IAEA Fusion Energy Conference, Chengdu China 21 st October 2006 Excitation of Alfvén eigenmodes with sub-Alfvénic neutral beam ions in.

Fast imaging of global eigenmodes in the H-1 heliac ABSTRACT We report a study of coherent plasma instabilities in the H-1 plasma using a synchronous gated.

General Licensing Class G8A – G8B Signals and Emissions Your organization and dates here.

Radio Communication SL – Option F.1. Radio communication includes any form of communication that uses radio (EM) waves to transfer information –TV, mobile.

Reflectometry on Alcator C-Mod: Status and future upgrades Outline: C-Mod reflectometry Physics examples Upgrades: 1.High frequency 2.Sideband 3.Data acquisition.

IPP - Garching Reflectometry Diagnostics and Rational Surface Localization with Fast Swept Systems José Vicente

1 JBW-NSTX 9/10/02 Reflectometer Measurements of the Plasma Edge in front of the HHFW antennas John Wilgen, David Swain, Greg Hanson, Phil Ryan Oak Ridge.

Edge ECE measurements with the AUG CTS receiver and the effects of ELMs during H-mode Morten Stejner.

SUNIST SUNIST- Sino UNIted Spherical Tokamak Preliminary experiment of plasma current startup by ECR wave on SUNIST spherical tokamak HE Yexi, ZHANG Liang,

The study of MARFE during long pulse discharges in the HT-7 tokamak W.Gao, X.Gao, M.Asif, Z.W.Wu, B.L.Ling, and J.G.Li Institute of Plasma Physics, Chinese.

Remote Radio Sounding Science For JIMO J. L. Green, B. W. Reinisch, P. Song, S. F. Fung, R. F. Benson, W. W. L. Taylor, J. F. Cooper, L. Garcia, D. Gallagher,

The principle of SAMI and some results in MAST 1. Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui, , China 2. Culham Centre.

ASIPP On the observation of small scale turbulence on HT-7 tokamak* Tao Zhang**, Yadong Li, Shiyao Lin, Xiang Gao, Junyu Zhao, Qiang Xu Institute of Plasma.

Amplitude Modulation 2.2 AM RECEIVERS

6.9 How radio works 22 October 2015 What is this image? What other information can you get from it?

CHAPTER 2 Amplitude Modulation 2-3 AM RECEIVERS. Introduction AM demodulation – reverse process of AM modulation. Demodulator: converts a received modulated-

Chapter 5: Electronic Music and Synthesizers Who uses electronic musical synthesizers? Each advance in electronic technology is followed by a concomitant.

Signals and Emissions 1 G8 - SIGNALS AND EMISSIONS [2 exam questions - 2 groups] G8A - Carriers and modulation: AM; FM; single and double sideband; modulation.

AST 443: Submm & Radio Astronomy November 18, 2003.

Characterization of core and edge turbulence in L- and H-mode Alcator C-Mod plasmas Outline: Alcator C-Mod tokamak Fluctuation diagnostics Low to high.

HT-7 HIGH POWER MICROWAVE TEST SYSTEM AND EXPERIMENTS WANG Mao, LIU Yue-xiu, SHAN Jia-fang, LIU Fu-kun, XU Han-dong, YU Jia-wen Institute of Plasma Physics,

Fyzika tokamaků1: Úvod, opakování1 Tokamak Physics Jan Mlynář 8. Heating and current drive Neutral beam heating and current drive,... to be continued.

EECE 252 PROJECT SPRING 2014 Presented by: Peizhen Sun Nor Asma Mohd Sidik.

RF simulation at ASIPP Bojiang DING Institute of Plasma Physics, Chinese Academy of Sciences Workshop on ITER Simulation, Beijing, May 15-19, 2006 ASIPP.

EAST Data processing of divertor probes on EAST Jun Wang, Jiafeng Chang, Guosheng Xu, Wei Zhang, Tingfeng Ming, Siye Ding Institute of Plasma Physics,

1 Instabilities in the Long Pulse Discharges on the HT-7 X.Gao and HT-7 Team Institute of Plasma Physics, Chinese Academy of Sciences, P.O.Box 1126, Hefei,

ASIPP Long pulse and high power LHCD plasmas on HT-7 Xu Qiang.

CHAPTER 2 Amplitude Modulation 2-3 AM RECEIVERS. Introduction AM demodulation – reverse process of AM modulation. Demodulator: converts a received modulated-

MHD Suppression with Modulated LHW on HT-7 Superconducting Tokamak* Support by National Natural Science Fund of China No J.S.Mao, J.R.Luo, B.Shen,

ASIPP HT-7 The effect of alleviating the heat load of the first wall by impurity injection The effect of alleviating the heat load of the first wall by.

HT-7 ASIPP The Influence of Neutral Particles on Edge Turbulence and Confinement in the HT-7 Tokamak Mei Song, B. N. Wan, G. S. Xu, B. L. Ling, C. F. Li.

HT-7 Soft x-ray PHA diagnostics in the HT-7 and the EAST Z.Y.Chen, Y.J.Shi,B.Lv,B.N.Wan, L.Q.Hu, S.Y.Lin Q.S.Hu, S.X.Liu, Institute of Plasma Physics,Chinese.

ASIPP HT-7 Behaviors of Impurity and Hydrogen Recycling on the HT-7 Tokamak J. Huang*, B.N. Wan, X.Z. Gong, Z.W. Wu and the HT-7 Team Institute of Plasma.

HT-7 A new soft x-ray PHA diagnostic in the HT-7 tokamak Zhongyong Chen, Yuejiang Shi,Bo Lv,Baonian Wan, Shiyao Lin,Liqun Hu,Qingsheng Hu, Shenxia Liu,Shiyao.

1 LHCD Properties with a New Lower Hybrid Wave Antenna on HT-7 Tokamak Wei Wei,Guangli Kuang,Bojiang Ding,Weici Shen and HT-7 Team Institute of Plasma.

Proposal for Relative Calibration of ECE Diagnostic System in HT-7 Tokamak. BY S. Sajjad Institute of Plasma Physics, Chinese Academy of Sciences,

HT-7 ASIPP The measurement of the light impurity radiation profiles for the impurity particle transport in the HT-7 tokamak Qian Zhou, B.N.Wan, Z.W.Wu,

Meghe Group of Institutions Department for Technology Enhanced Learning 1.

Amplitude Modulation Circuits

Feedback control of the LHW Power by HVPS Huang Yiyun Institute of Plasma Physics, Chinese Academy of Science, P.O.Box 1126, Hefei, Anhui, , P.R.China.

F. Caspers, S. Federmann, E. Mahner, B. Salvant, D. Seebacher 1.

1 ASIPP Sawtooth Stabilization by Barely Trapped Energetic Electrons Produced by ECRH Zhou Deng, Wang Shaojie, Zhang Cheng Institute of Plasma Physics,

1 Current State of Omegatron Analyzer in the HT-7 Tokamak HT-7 ASIPP Ling Bi-li a),Wang En-yao b),Gao wei a),Wan Bao-nian a),Li Jian-gang a) a) Institute.

1 NSTX Electron Bernstein Wave Emission Measurements Gary Taylor NSTX Results Review September 20-21, 2004.

Current Drive Experiments with Oscillating Toroidal Flux in HT-7 Superconducting Tokamak J.S.Mao, P. Phillips 1, J.R.Luo, J.Y.Zhao, Q.L.Wu, Z.W.Wu, J.G.Li,

Amateur Radio Licensure Week 6: Transmission Modes and Radio Components Seth Price, N3MRA New Mexico Institute of Mining and Technology March 6, 2016.

Cape Electrical and Electronic Technology Topic: Electromagnetic Waves By: Tahvorn George & Charles,J.

HT-7 Proposal of the investigation on the m=1 mode oscillations in LHCD Plasmas on HT-7 Exp2005 ASIPP Youwen Sun, Baonian Wan and the MHD Team Institute.

Lower Hybrid Wave Coupling and Current Drive Experiments in HT-7 Tokamak Weici Shen Jiafang Shan Handong Xu Min Jiang HT-7 Team Institute of Plasma Physics,

A function generator is usually a piece of electronic test equipment or software used to generate different types of electrical waveforms over a wide.

Measurement and Instrumentation

Modulation and Multiplexing Broadband Transmission – A carrier is a high frequency signal that is modulated by audio, video, or data. – A radio-frequency.

Demodulation/ Detection Chapter 4

Turbulence wave number spectra reconstruction

Temperature Measurements of Limiter Surfaces at High Heat Flux in the HT-7 Tokamak H. Lin, X.Z. Gong, J. Huang, J.Liu, B. Shi, X.D. Zhang, B.N. Wan,

Amplitude Modulation Circuits

Amplitude Modulation.

CHAPTER - 6 Introduction to Communication Systems (222 CNET - 3)

Poster: EX/P4-19; Authors: JJU Buch and S K Pathak

Reflectometry measurements of turbulence in Alcator C-Mod plasmas

Performance of the Band 3 ( GHz) receiver for ALMA

Presentation transcript:

A Microwave Reflectometry Based On Amplitude Modulation onHT-7 Tokamak B.L.Ling, Institute of Plasma Physics, Chinese Academy of Sciences, P.O.Box 1126, Hefei, P.R.China,

Abstract A broadband reflectometer operating in the frequency range 48-72GHz has been designed on HT-7 tokamak (R 0 =1.22m, a-0.27m, B t : Tesla) and is able to measure electron density profiles at the edge from the scrape-off layer up to typical r/a=0.5. The system uses extraordinary mode polarization and will perform routine measurement with heterodyne detection. The determination of the time delay for each frequency is achieved by measuring the phase delay of a 200MHz amplitude modulation envelope superimposed on the millimiter wave probing signal. The electron density profile is able to obtain edge electron density profile during a 1ms sweep of the microwave source. A 2MHz reference signal and the probing signal are obtained by mixing a 198MHz local oscillator with the demodulated microwave signals. Phase signals are generated at 2MHz and amplitude information is obtained by the ratio of 2MHz probing signal before and after limited amplification. The amplitude information is of great importance for determination of the profile initialization. The goal of the instrument is to investigate the lower hybrid wave coupling into plasmas for current drive and the radio frequency wave coupling problems for heating on HT-7.

Cut-off frequency profile for an assumed parabolic density profile and possible central density n e0 on HT-7 tokamak X=1-Y X=1+Y

Structure of the AM reflectometer

Microwave transmission of the reflectometry

The output of the microwave source vs. frequency

Phase measurement in lab test

Summary 1)A reflectometry base on amplitude modulation has been designed in hope to obtain electron density profile on HT- 7 tokamak. 2)In order to cover the wide radius range under the different discharge conditions, frequency range is chosen to be 48-72GHz. 3)The microwave source of the reflectometer is a hyperabrupt varactor-tuned oscillator, which generates frequencies between 12 and 18 GHz, and with an active multiplier chain,the required frequency range can be fulfilled. 4)After the necessary test and calibration, and combining these diagnostics, the density profile can be obtained by this reflectometry system.