The Review of scientific instruments最新文献_第6页

Reduction of noise induced by power supply lines using phase-locked loop. 用锁相环降低供电线路噪声。

IF 1.6

The Review of scientific instruments Pub Date : 2022-11-01 DOI: 10.1063/5.0124433

M Abe, H Yamashita, S Jinno, O Custance, H Toki

引用次数: 0

Data-driven fractional order feedback and model-less feedforward control of a XY reluctance-actuated micropositioning stage. XY磁阻微定位平台的数据驱动分数阶反馈和无模型前馈控制。

IF 1.6

The Review of scientific instruments Pub Date : 2022-11-01 DOI: 10.1063/5.0098759

Xu Zhang, Leijie Lai, Pengzhi Li, Li-Min Zhu

{"title":"Data-driven fractional order feedback and model-less feedforward control of a XY reluctance-actuated micropositioning stage.","authors":"Xu Zhang, Leijie Lai, Pengzhi Li, Li-Min Zhu","doi":"10.1063/5.0098759","DOIUrl":"https://doi.org/10.1063/5.0098759","url":null,"abstract":"This paper proposes a compound data-driven control method to solve the problems of low damping resonance, different dynamic properties, and hysteresis in the large-range compliant micropositioning stage driven by a Maxwell reluctance actuator. First, in order to verify the proposed control algorithm, a reluctance-actuated, XY compliant micropositioning stage is constructed according to the principle of operation of a reluctance actuator. Second, in order to eliminate the influence of complex dynamics on the controller design, a fractional order proportional-integral feedback controller is designed using a data iterative feedback turning algorithm. Third, the finite impulse response feedforward filter is optimized using experimental data, and the on-line inverse estimation of the system frequency response function and its iterative feedforward compensation are carried out to further eliminate the influence of light damping resonance. Finally, the proposed control method is used for tracking the experiment and compared with other methods. The experimental results show that the proposed control method can better meet the requirements of high precision, fast speed, and strong anti-interference ability for large stroke micro/nanopositioning and tracking.","PeriodicalId":519534,"journal":{"name":"The Review of scientific instruments","volume":" ","pages":"115002"},"PeriodicalIF":1.6,"publicationDate":"2022-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40458364","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Implementation of a portable diagnostic system for Thomson scattering measurements on an electrothermal arc source. 电热电弧源汤姆森散射测量便携式诊断系统的实现。

IF 1.6

The Review of scientific instruments Pub Date : 2022-11-01 DOI: 10.1063/5.0101835

Z He, N Kafle, T E Gebhart, T M Biewer, Z Zhang

引用次数: 0

Design study of an edge current density diagnostic using new high-performance single-channel beam emission spectrometers at DIII-D. 在DIII-D上使用新型高性能单通道光束发射光谱仪进行边缘电流密度诊断的设计研究。

IF 1.6

The Review of scientific instruments Pub Date : 2022-11-01 DOI: 10.1063/5.0101781

R Albosta, B Geiger, G McKee, D Den Hartog, J Schellpfeffer, T Gallenberger, S Stewart, R Dux

{"title":"Design study of an edge current density diagnostic using new high-performance single-channel beam emission spectrometers at DIII-D.","authors":"R Albosta, B Geiger, G McKee, D Den Hartog, J Schellpfeffer, T Gallenberger, S Stewart, R Dux","doi":"10.1063/5.0101781","DOIUrl":"https://doi.org/10.1063/5.0101781","url":null,"abstract":"A novel Motional Stark Effect spectroscopy system has been designed for application at the DIII-D tokamak. The system is optimized for studies of the poloidal and toroidal magnetic field in the plasma pedestal region with frame rates of up to 10 kHz. Light from an existing high-photon-throughput collection lens is analyzed using four single-channel f/2.8 Czerny-Turner spectrometers that use custom-made lens systems instead of mirrors. Each spectrometer has two separate outgoing legs and is operated in a positive grating order, which allows for simultaneous observations of D-alpha and D-beta spectra. Forward modeling using the code FIDASIM shows a radial resolution of the system close to 0.6 cm and sufficiently good spectral resolution when masking the high throughput light collection lens in the horizontal direction to avoid overly strong Doppler broadening of beam emission lines. Moreover, a detailed sensitivity study considering realistic levels of readout and photon noise shows that the poloidal and toroidal magnetic field strengths can be inferred with an uncertainty of less than 1%, which will allow the inference of changes of the plasma current during transient events.","PeriodicalId":519534,"journal":{"name":"The Review of scientific instruments","volume":" ","pages":"113546"},"PeriodicalIF":1.6,"publicationDate":"2022-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40464770","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Multi-stage voltage droop compensation based on resonant circuit for unipolar solid-state Marx Generators. 基于谐振电路的单相固态马克思发电机多级电压降补偿。

IF 1.6

The Review of scientific instruments Pub Date : 2022-11-01 DOI: 10.1063/5.0122198

Junfeng Rao, Yibo Huang, Xiuzhi Wang, Longyu Zhuang, Jie Zhuang, Zhenyu Ji

{"title":"Multi-stage voltage droop compensation based on resonant circuit for unipolar solid-state Marx Generators.","authors":"Junfeng Rao, Yibo Huang, Xiuzhi Wang, Longyu Zhuang, Jie Zhuang, Zhenyu Ji","doi":"10.1063/5.0122198","DOIUrl":"https://doi.org/10.1063/5.0122198","url":null,"abstract":"The low-voltage droop of high-voltage pulses is required to provide stable pulsed electric fields in many applications. Increasing the capacitance of energy storage capacitors increases both the size and the cost of the system. In this paper, four compensation stages based on the resonant circuit have been inserted into a 16-stage solid-state Marx generator to compensate for the voltage droop in different conditions. The nearly linear part of the sinusoidal voltage is precisely added to the load during discharging as compensation, and the rectangular pulsed voltage with little droop can be realized. Different numbers of compensation stages and different resonant inductances can compensate the droop to different levels, which means the compensation effect is also adjustable. Moreover, these compensation stages can operate as common stages in Marx generators as long as we open-circuit the resonant circuits. Since the capacitors in resonant compensation stages are also charged in parallel with capacitors in common stages, no auxiliary power supply is required. Simulating and experimental results show that the droop of a 9 kV pulse can be ideally compensated over a 500 Ω resistive load at various pulse widths. The pulse width should be shorter than the length of the nearly linear part of the sinusoidal voltage.","PeriodicalId":519534,"journal":{"name":"The Review of scientific instruments","volume":" ","pages":"114704"},"PeriodicalIF":1.6,"publicationDate":"2022-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40457973","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Ultra-compact x-ray spectrometer for high-repetition-rate laser-plasma experiments. 用于高重复率激光等离子体实验的超紧凑x射线光谱仪。

IF 1.6

The Review of scientific instruments Pub Date : 2022-11-01 DOI: 10.1063/5.0100970

G Zeraouli, D Mariscal, E Grace, G G Scott, K K Swanson, R Simpson, B Z Djordjevic, R Nedbailo, H Song, J Morrison, J Park, R Hollinger, S Wang, J J Rocca, T Ma

引用次数: 0

Constraining time-dependent ion temperature measurements in inertial confinement fusion (ICF) implosions with an intermediate distance neutron time-of-flight (nToF) detector. 用中距离中子飞行时间(nToF)探测器测量惯性约束聚变(ICF)内爆中的约束时间依赖离子温度。

IF 1.6

The Review of scientific instruments Pub Date : 2022-11-01 DOI: 10.1063/5.0099933

A S Moore, D J Schlossberg, M J Eckart, E P Hartouni, T J Hilsabeck, J S Jeet, S M Kerr, R C Nora, J Kilkenny

引用次数: 2

Design of a Multi-Monochromatic X-ray Imager (MMI) for Kr K-shell line emission. 用于Kr K壳层线发射的多单色X射线成像仪的设计。

IF 1.6

The Review of scientific instruments Pub Date : 2022-11-01 DOI: 10.1063/5.0101862

E Gallardo-Diaz, R C Mancini, D T Cliche, R Tommasini

{"title":"Design of a Multi-Monochromatic X-ray Imager (MMI) for Kr K-shell line emission.","authors":"E Gallardo-Diaz, R C Mancini, D T Cliche, R Tommasini","doi":"10.1063/5.0101862","DOIUrl":"https://doi.org/10.1063/5.0101862","url":null,"abstract":"The Multi-Monochromatic X-ray Imager (MMI) is a time-gated spectrometer used in implosion experiments at the OMEGA laser facility. From the data, electron temperature and density spatial distributions can be obtained at different implosion times. Previous MMI designs used Ar K-shell emission (3-6 keV) as a spectroscopic tracer and provided a spectral resolution of around 20 eV. However, Ar K-shell line emission becomes less useful at electron temperatures above 2 keV due to over-ionization. Kr K-shell (12-16 keV) has been shown to be an attractive alternative to diagnose hot implosion cores in recent publications. The purpose of this paper is to show a new point design that allows the MMI to detect this higher photon energy range with suitable spectral resolution. The algorithm used to find the optimal design couples a ray-tracing code and an exhaustive parameter space search. This algorithm may be useful as a tool to find optimal MMI designs for other purposes, i.e., other spectral regions for other spectroscopic tracers. The main change between the two designs is the replacement of the multi-layer mirror with a flat Bragg Ge (220) crystal. The final Kr K-shell MMI design has a photon energy range from 12 to 16.1 keV.","PeriodicalId":519534,"journal":{"name":"The Review of scientific instruments","volume":" ","pages":"113525"},"PeriodicalIF":1.6,"publicationDate":"2022-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40458384","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Design of a multi-detector, single line-of-sight, time-of-flight system to measure time-resolved neutron energy spectra. 多探测器、单线视距、飞行时间系统的设计，用于测量时间分辨中子能谱。

IF 1.6

The Review of scientific instruments Pub Date : 2022-11-01 DOI: 10.1063/5.0101874

D J Schlossberg, A S Moore, J S Kallman, M Lowry, M J Eckart, E P Hartouni, T J Hilsabeck, S M Kerr, J D Kilkenny

{"title":"Design of a multi-detector, single line-of-sight, time-of-flight system to measure time-resolved neutron energy spectra.","authors":"D J Schlossberg, A S Moore, J S Kallman, M Lowry, M J Eckart, E P Hartouni, T J Hilsabeck, S M Kerr, J D Kilkenny","doi":"10.1063/5.0101874","DOIUrl":"https://doi.org/10.1063/5.0101874","url":null,"abstract":"In the dynamic environment of burning, thermonuclear deuterium-tritium plasmas, diagnosing the time-resolved neutron energy spectrum is of critical importance. Strategies exist for this diagnosis in magnetic confinement fusion plasmas, which presently have a lifetime of ∼1012 longer than inertial confinement fusion (ICF) plasmas. Here, we present a novel concept for a simple, precise, and scale-able diagnostic to measure time-resolved neutron spectra in ICF plasmas. The concept leverages general tomographic reconstruction techniques adapted to time-of-flight parameter space, and then employs an updated Monte Carlo algorithm and National Ignition Facility-relevant constraints to reconstruct the time-evolving neutron energy spectrum. Reconstructed spectra of the primary 14.028 MeV nDT peak are in good agreement with the exact synthetic spectra. The technique is also used to reconstruct the time-evolving downscattered spectrum, although the present implementation shows significantly more error.","PeriodicalId":519534,"journal":{"name":"The Review of scientific instruments","volume":" ","pages":"113528"},"PeriodicalIF":1.6,"publicationDate":"2022-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40458486","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Laboratory tests of CO₂ laser collective Thomson scattering for measurements of ion temperature in the divertor. 二氧化碳激光集体汤姆逊散射在导流器中测量离子温度的实验室试验。

IF 1.6

The Review of scientific instruments Pub Date : 2022-11-01 DOI: 10.1063/5.0101407

T H Hisakado, T Akiyama, T N Carlstrom

引用次数: 0