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We simulate decaying turbulence in a homogeneous pair plasma using three dimensional electromagnetic particle-in-cell (PIC) method. A uniform background magnetic field permeates the plasma such that the magnetic pressure is three times…

空间物理 · 物理学 2017-02-08 R. Kumar , D. Eichler , M. Gaspari , A. Spitkovsky

An experimental investigation was carried out to study heat transfer rates in a high-temperature, high-pressure region generated using the shock focusing technique. A shock tube test facility with a specially designed spherically converging…

流体动力学 · 物理学 2024-05-21 Saranyamol V. S. , Jithin Sreekumar , Mohammed Ibrahim S

Induced thermal scattering power thresholds have been calculated as a function of size and laser pump frequency. The thermal coupling coefficients of morphology dependent resonances were estimated by asymptotic methods. The resulting power…

光学 · 物理学 2007-11-15 M. V. Jouravlev

In this paper, we present the results of an analysis of 481 weak solar flares, from A0.01 to the B \textit{GOES} class, that were observed during the period of extremely low solar activity from 2009 April to July. For all flares we measured…

太阳与恒星天体物理 · 物理学 2017-06-20 A. S. Kirichenko , S. A. Bogachev

In non-inverted heating scenarios, a lower hybrid (LH) resonance can appear in the plasma edge of tokamaks. This resonance can lead to large edge power deposition when heating in the ion cyclotron resonance frequency (ICRF) range. In this…

等离子体物理 · 物理学 2021-01-26 Vincent Maquet , Adrien Druart , André Messiaen

We present observations of SS 433 using the Chandra High Energy Transmission Grating Spectrometer. Many emission lines of highly ionized elements are detected with the relativistic blue and red Doppler shifts. The lines are measurably…

天体物理学 · 物理学 2009-11-07 Herman L. Marshall , Claude R. Canizares , Norbert S. Schulz

Interface impedes heat flow in heterostructures and the interfacial thermal resistance (ITR) has become a critical issue for thermal dissipation in electronic devices. To explore the mechanism leading to the ITR, in this work, the dynamic…

应用物理 · 物理学 2023-06-28 Quanjie Wang , Jie Zhang , Vladimir Chernysh , Xiangjun Liu

We exploit the high spatial resolution and high cadence of the Interface Region Imaging Spectrograph (IRIS) to investigate the response of the transition region and chromosphere to energy deposition during a small flare. Simultaneous…

太阳与恒星天体物理 · 物理学 2016-09-28 Harry P. Warren , Jeffrey W. Reep , Nicholas A. Crump , Paulo J. A. Simoes

Recent studies have shown direct ion heating (vashistha2020new,Juneja_2023) by lasers EM (Electromagnetic) wave interacting with a plasma threaded by an external uniform magnetic field. The EM wave frequency was near the lower hybrid (LH)…

等离子体物理 · 物理学 2024-04-22 Rohit Juneja , Trishul Dhalia , Amita Das

We present results of X-ray observations of the Coma cluster with multiple instruments over a broad energy band. Using the data from INTEGRAL, RXTE and ROSAT observatories, we find that the Coma spectrum in the 0.5-107 keV energy band can…

天体物理学 · 物理学 2009-11-13 A. A. Lutovinov , A. Vikhlinin , E. M. Churazov , M. G. Revnivtsev , R. A. Sunyaev

This study presents the first ion temperature (\(T_i\)) measurements from the MAST-U divertor using a Retarding Field Energy Analyzer (RFEA). Embedded within the flat tile of the closed divertor chamber, the RFEA captures \(T_i\) profiles…

等离子体物理 · 物理学 2024-10-15 Y. Damizia , S. Elmore , P. Ryan , S. Allan , F. Federici , N. Osborne , J. W. Bradley , the MAST-U Team

The present paper deals with the surface heat flux estimation with thermocouples (TC) and fiber Bragg grating (FBG) embedded in the plasma facing components (PFC) of the WEST tokamak. A 2D heat transfer model combined with the conjugate…

Extra Ordinary (X) mode conversion to Bernstein wave near Upper Hybrid Resonance (UHR) layer plays an important role in plasma heating through cyclotron resonance. Wave generation at UHR and parametric decay at high power has been observed…

等离子体物理 · 物理学 2007-05-23 Vipin K. Yadav , D. Bora

Effective temperatures and radii for 92 planet-hosting stars as determined from the InfraRed Flux Method (IRFM) are presented and compared with those given by other authors using different approaches. The IRFM temperatures we have derived…

天体物理学 · 物理学 2009-11-10 Ivan Ramirez , Jorge Melendez

ITER-like tungsten Langmuir probes (W DLPs) have been installed and tested at the lower divertor horizontal target composed of flat-type components in EAST. Due to the non-active cooling, transient thermal and stress\strain analyses…

等离子体物理 · 物理学 2023-06-06 Chunyu He , Dahuan Zhu

Spectroscopic characterization of a specific case of the atmospheric pressure air jet plasma in the transverse cw dc arc discharge of high voltage was done. Within the spectrum of wavelengths from 200 to 1100 nm all remarkable emissions…

等离子体物理 · 物理学 2007-05-23 Valeriy Chernyak , Vadym Naumov , Vitaliy Yukhimenko

Dense arrays of trapped ions provide one way of scaling up ion trap quantum information processing. However, miniaturization of ion traps is currently limited by sharply increasing motional state decoherence at sub-100 um ion-electrode…

The temperature dependence of the steady-state fluorescence spectrum of anthracene crystals range from 300K to 500K had been investigated, which was in the temperature range of most tabletop laser-driven shock wave experiments. The…

应用物理 · 物理学 2019-08-06 Cheng Tang , Xiaojun Zhu , Yunfei Song , Weilong Liu , Qingxin Yang , Zhe lv , Yanqiang Yang

Fe XXV lines at 1.85 A (6.70 keV) and nearby Fe XXIV satellites have been widely used for determining the temperature of the hottest parts of solar flare and tokamak plasmas, though the spectral region is crowded and the lines are blended…

天体物理学 · 物理学 2009-11-13 K. J. H. Phillips

We report on active region EUV dynamic events observed simultaneously at high-cadence with SUMER/SoHO and TRACE. Although the features appear in the TRACE Fe ix/x 171A images as jets seen in projection on the solar disk, the SUMER spectral…

天体物理学 · 物理学 2009-11-13 M. S. Madjarska , J. G. Doyle , D. Innes , W. Curdt