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Design of Thermal Impulse Temperature Controller

第十五届全国等离子体科学技术会议

作者： y.Sun,Z.P chen1 Z.j.Wang,G.Zhuang and j.TEXT team college of electrical and electronic Engineering,huazhong university of science and technology, Wuhan Hubei,430074,China

Decades of studies on tokamaks have shown that the turbulence caused by.electrostatic fluctuations contributes a maj.rity.of the anomalous cross-field transport in the boundary.region of tokamaks,However,the origin of the anomalous transport is still an open *** the basic of a deeper investigation of the turbulence,the transport in the boundary.of the newlv-reconstructed tokamak j.TEXT is sy.temically.studied

关键词： electrostatic fluctuations anomalous transport j.TEXT tokamak reciprocating Langmuir probe.

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Design of Thermal Impulse Temperature Controller

2009 International Conference on Modeling, Simulation and Optimization

作者： chen j.n~*,Zhou j.n,Wang Zhenhua School of electronic and electrical Engineering Shanghai Second Poly.echnic university Shanghai,China,201209 Wang Huiling School of Energy.& Power Engineering huazhong university of science and technology Wuhan,China,430070

Adoping pan-Boolean algebraic PID control theory. this paper designed a thermal impulse temperature controller based on MCU STC12C2052AD and H-bridge *** Hbridge controlled the electric current direction of the semiconductor cooler and enables the cooler to output thermal *** change rate of the current direction controlled the frequency.of the thermal ***,the pan-Boolean algebraic PID control algorithms controlled the temperature amplitude of the thermal impulse by.adj.sting the duty.factor of H-bridge PWM *** experiment test shows that the amplitude range of the exporting thermal impulse signal of the controller is from 0 to 60℃relative error is 1%, the rising time and dropping time of the thermal impulse are less than 50ms.

关键词： thermal impulse pan-Boolean algebra semiconductor cooling temperature control

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基于DSP的智能化UPS通信接口设计

电源世界 2008年第7期 59-62页

作者：单鸿涛康勇罗防陈息坤湖北汽车工业学院电气工程系十堰442002 华中科技大学电气与电子工程学院武汉430074 郑州轻工业学院信息与控制工程系郑州450002

智能化UPS通过增设通信接口提高了UPS的管理水平,方便地实现了远程监控。本文以TMS320系列DSP为主控芯片的智能化UPS为例,介绍其通信接口的设计,给出了相关硬件电路及程序流程图。该设计方法实现方便,值得推广。

关键词： DSP RS-232 通信 SNMP

Wideband tunable passively.Q-switched fiber laser at 2.8 μm using a broadband carbon nanotube saturable absorber

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Photonics Research 2019年第1期7卷 14-18页

作者： y.Nj.A Lü chen WEI HAN ZHANG ZHE kang GUANSHI QIN y.NG LIU State Key.Laboratory.of electronic Thin Films and Integrated Devices School of Optoelectronic Science and EngineeringUniversity of Electronic Science and Technology of China college of electrical Engineering and Information technology Sichuan University Changchun Observatory National Astronomical Observatories Chinese Academy of Sciences State Key.Laboratory.on Integrated Optoelectronics College of Electronic Science & Engineering Jilin University

We propose and demonstrate a widely.tunable passively.Q-switched Ho^(3+)∕Pr^(3+)-codoped ZrF_4-BaF_2-LaF_3-AlF_3-NaF fiber laser operating in the 2.8 μm mid-infrared(MIR) waveband based on a single-walled carbon nanotube(SWCNT) saturable absorber(SA). The SWCNTs have diameters ranging from 1.4 to 1.7 nm. The modulation depth and saturation intensity.of the SWCNT SA measured at 2850 nm are 16.5% and 1.66 MW∕cm^2, respectively. Stable Q-switched pulses with the shortest pulse duration of 1.46 μs and the maximum pulse energy.of 0.43 μj.are achieved at a launched pump power of 445.6 mW. The combined use of a broadband SWCNT SA and a plane ruled grating ensures a broad continuously.tuning range of 55.0 nm from 2837.6 to 2892.6 *** output powers, emission spectra, repetition rates, and pulse durations at different tuning wavelengths are also characterized and analy.ed. Our results indicate that SWCNTs can be excellent broadband SAs in the 3 μm MIR region. To the author's knowledge, this is the first demonstration of a widely.tunable carbon-nanotubeenabled passively.Q-switched fiber laser operating in the 2.8 μm MIR waveband.

关键词： broadband carbon excellent SWCNTs pulse Ho^3+ SAs pump

Experimental study.of sheath potential coefficient in the j.TEXT tokamak

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Plasma science and technology 2021年第3期23卷 51-56页

作者：赵伟聂林严龙文许敏柯锐阳杰陈志鹏王占辉王雅丽 j.TEXT Team Southwestern Institute of Phy.ics Chengdu 610041People's Republic of China college of electrical and electronic Engineering Huazhong University of Science and TechnologyWuhan 430074People's Republic of China

Sheath potential coefficient α is a key.parameter, which is used to estimate plasma potential(Vp)for edge plasma phy.ics study. Recently. a series of experiments has been carried out under hy.rogen plasmas in the j.TEXT tokamak with swept probe, which is employ.d for current–voltage(I–V) characteristic measurement. Electron temperature is evaluated from I–V curve by.three-parameter fitting method, and the electron energy.probability.function shows that electron distribution is Maxwellian both outside and inside of last closed flux surface(LCFS). Plasma potential is obtained by.crossing point between I–V exponential fitting curve and electron saturation current extrapolating line, which is in good agreement with first derivative probe technique. The α coefficient profile in the vicinity.of the LCFS is obtained, which is in the range of 2.1–3, and decreases from outside to inside of LCFS.

关键词： Langmuir probe sheath potential coefficient EEPF

Development of electromagnetic pellet inj.ctor for disruption mitigation of tokamak plasma

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Chinese Phy.ics B 2023年第7期32卷 29-36页

作者：李峰陈忠勇夏胜国严伟张维康唐俊辉李由钟昱方建港刘凡溪邹癸南喻寅龙聂子森江中和王能超丁永华潘垣 j.TEXT team International j.int Research Laboratory.of Magnetic Confinement Fusion and Plasma Phy.ics State Key Laboratory of Advanced Electromagnetic Engineering and TechnologySchool of Electrical and Electronic EngineeringHuazhong University of Science and TechnologyWuhan 430074China Key.Laboratory.of Pulsed Power technology Ministry.of Education huazhong university of science and technology School of Electrical and Electronic EngineeringHuazhong University of Science and TechnologyWuhan 430074China

Disruption remains to be a serious threat to large tokamaks like the International Thermonuclear Experimental Reactor(ITER).The inj.ction speed of disruption mitigation sy.tems(DMS)driven by.high pressure gas is limited by.the sound speed of the propellant *** extrapolating to ITER-like tokamaks,long overall reaction duration and shallow penetration depth due to low inj.ction speed make it stricter for plasma control sy.tem to predict the impending *** disruptions with a short warning time may.be ***,a fast time response and high inj.ction speed DMS is essential for large scale *** electromagnetic pellet-inj.ction(EMPI)sy.tem is a novel massive material inj.ction sy.tem aiming to provide rapid and effective disruption *** on the railgun concept,EMPI can accelerate the pay.oad to over 1000 m/s and shorten the overall reaction time to a few *** verify.the inj.ction ability.and stability.of the EMPI,the prototy.e inj.ctor EMPI-1 has been designed and *** preliminary.test has been carried out using a 5.9 g armature to propel a dummy.pellet and the results suggest that the EMPI configuration has a great potential to be the DMS of the large scale fusion devices.

关键词： tokamak disruption mitigation sy.tem electromagnetic pellet-inj.ction(EMPI)

Design of new resonant magnetic perturbation coils on the j.TEXT tokamak

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Plasma science and technology 2023年第11期25卷 142-149页

作者：黄卓周松樊金荣李达饶波王能超丁永华毛飞越黄名响田微陈忠勇陈志鹏梁云峰 the j.TEXT Team college of Computer science South-Central Minzu UniversityWuhan 430074People’s Republic of China International j.int Research Laboratory.of Magnetic Confinement Fusion and Plasma Phy.ics State Key Laboratory of Advanced Electromagnetic Engineering and TechnologySchool of Electrical and Electronic EngineeringHuazhong University of Science and TechnologyWuhan 430074People’s Republic of China Forschungszentrum j.lich GmbH Institut für Energie-und Klimaforschung-PlasmaphysikPartner of the Trilateral Euregio Cluster(TEC)Jülich D-52425Germany 不详

The resonant magnetic perturbation(RMP)sy.tem is a powerful auxiliary.sy.tem on *** the j.TEXT tokamak,a set of new in-vessel coils is designed to enhance the amplitude of the *** new coils are designed to be two-turn saddle *** two-turn saddle coils have been optimized in terms of their structure,support,and protection components to overcome the limitations of the narrow in-vessel space,resulting in a compact coil module that can be accommodated in the *** verify.the feasibility.of this design,an electromagnetic simulation is performed to investigate the electrical parameters and the generated field of the coils.A multi-field coupled simulation is performed to investigate the capacity.of heat *** a result of these efforts,the new RMP coils have been successfully.installed on the j.TEXT *** has significantly.enhanced the RMP amplitude and been widely.applied in experiments.

关键词： fusion engineering tokamak resonant magnetic perturbation coil multi-field coupled simulation(Some fioures may.appeari in colour only.in the online iournal)

Effect of edge magnetic island on carbon screening in the j.TEXT tokamak

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Plasma science and technology 2021年第12期23卷 22-31页

作者：张晓龙程芝峰周松梁云峰严伟王能超张霄翼江中和杨州军徐鑫李达李琼林晓东丁永华陈忠勇陈志鹏 j.TEXT Team Advanced Energy.Research Center Shenzhen UniversityShenzhen 518060People's Republic of China Key.Laboratory.of Optoelectronic Devices and Sy.tems of Ministry.of Education and Guangdong Province College of Optoelectronic EngineeringShenzhen UniversityShenzhen 518060People's Republic of China State Key.Laboratory.of Advanced Electromagnetic Engineering and technology School of Electrical and Electronic Engineering.Huazhong University of Science and TechnologyWuhan 430074People's Republic of China Forschungszentrum j.lich GmbH Institut fur Energie und Klimaforschung-Plasmaphysik52425 JiilichGermany

The effect of externally.applied resonant magnetic perturbation(RMP)on carbon impurity.behavior is investigated in the j.TEXT *** is found that the m/n=3/1 islands have an impurity.screening effect,which becomes obvious while the edge magnetic island is generated via RMP field *** impurity.screening effect shows a dependence on the RMP phase with the field penetration,which is strongest if the O point of the magnetic island is near the low-field-side(LFS)limiter *** combining a methane inj.ction experimental study.and STRAHL impurity.transport analy.is,we found that the variation of the impurity.transport dominates the impurity.screening *** impurity.diffusion at the inner plasma region(r/ay.at the edge region in the case of the magnetic island’s O point near the LFS limiter *** impurity.transport coefficient varies by.a much lower level for the case with the magnetic island’s X point near the LFS limiter *** interaction of the magnetic island and the LFS limiter plate is thought to contribute to the impurity.transport variation with the dependence on the RMP phase.A possible reason is the interaction between the magnetic island and the LFS limiter.

关键词： magnetic island impurity.transport resonant magnetic perturbation boundary.plasma phy.ics j.TEXT tokamak

Study.of the spectrum effect on the threshold of resonant magnetic perturbation penetration on j.TEXT

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Plasma science and technology 2022年第12期24卷 16-25页

作者：毛飞越王能超黄卓任正康周松沈呈硕张霄翼何莹张琪贾若赵传旭李杨波胡博李达 Abba Alhaj. BALA 陈志鹏陈忠勇杨州军梁云峰丁永华潘垣 the j.TEXT Team International j.int Research Laboratory.of Magnetic Confinement Fusion and Plasma Phy.ics State Key Laboratory of Advanced Electromagnetic Engineering and TechnologySchool of Electrical and Electronic EngineeringHuazhong University of Science and TechnologyWuhan 430074People's Republic of China college of Computer science South-Central Minzu UniversityWuhan 430074People's Republic of China Phy.ics Department Federal University DutseDutse 720101JigawaNigeria Forschungszentrum j.lich GmbH Institut für Energie-und Klimaforschung-PlasmaphysikPartner of the Trilateral Euregio Cluster(TEC)Jülich 52425Germany Institute of Plasma Phy.ics Chinese Academy of SciencesHefei 230031People's Republic of China

The spectrum effect on the penetration of resonant magnetic perturbation(RMP) is studied with upgraded in-vessel RMP coils on *** poloidal spectrum of the RMP field,especially.the amplitudes of 2/1 and 3/1 components,can be varied by.the phase difference between the upper and lower coil rows,ΔΦ=Φ_(top)-Φ_(bottom),where Φ_(top)and Φ_(bottom)are the toroidal phases of the n=1 field of each coil *** ty.e of RMP penetration is found to be related to ΔΦ,including the RMP penetration of either 2/1 or 3/1 RMP and the successive penetrations of 3/1 RMP followed by.the 2/1 *** cases with penetration of only.one RMP component,the penetration thresholds measured by.the corresponding resonant component are close for variousΔΦ.However,the 2/1 RMP penetration threshold is significantly.reduced if the 3/1 locked island is formed in *** changes in the rotation profile due to 3/1 locked island formation could partially.contribute to the reduction of the 2/1 thresholds.

关键词： tokamak error field resonant magnetic perturbation mode penetration spectrum analy.is