R. Chen
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View article: Simulation of radiation environment for the beam monitor of CEE experiment
Simulation of radiation environment for the beam monitor of CEE experiment Open
The cooling storage ring external-target experiment is a large-scale nuclear physics experiment, which aims to study the physics of heavy-ion collisions at low temperatures and high baryon densities. A beam monitor (BM) is placed in the be…
View article: Development and preliminary results of 270 GHz microwave forward scattering diagnostic system on the experimental advanced superconducting tokamak (EAST)
Development and preliminary results of 270 GHz microwave forward scattering diagnostic system on the experimental advanced superconducting tokamak (EAST) Open
To measure localized (intermediate, high) poloidal wavenumber electron density fluctuations, a tangential millimeter-wave collective scattering system has been designed and successfully developed on the experimental advanced superconductin…
View article: Study on the turbulence transition in the pedestal of high-density H-mode plasmas in EAST
Study on the turbulence transition in the pedestal of high-density H-mode plasmas in EAST Open
In the Experimental Advanced Superconducting Tokamak (EAST), a transition from electromagnetic to electrostatic turbulence is observed in the pedestal region as plasma density ramps up. This transition is manifested by the suppression of m…
View article: SOAEsV2-7B/72B: Full-Pipeline Optimization for State-Owned Enterprise LLMs via Continual Pre-Training, Domain-Progressive SFT and Distillation-Enhanced Speculative Decoding
SOAEsV2-7B/72B: Full-Pipeline Optimization for State-Owned Enterprise LLMs via Continual Pre-Training, Domain-Progressive SFT and Distillation-Enhanced Speculative Decoding Open
This study addresses key challenges in developing domain-specific large language models (LLMs) for Chinese state-owned assets and enterprises (SOAEs), where current approaches face three limitations: 1) constrained model capacity that limi…
View article: GeoUni: A Unified Model for Generating Geometry Diagrams, Problems and Problem Solutions
GeoUni: A Unified Model for Generating Geometry Diagrams, Problems and Problem Solutions Open
We propose GeoUni, the first unified geometry expert model capable of generating problem solutions and diagrams within a single framework in a way that enables the creation of unique and individualized geometry problems. Traditionally, sol…
View article: Nuclear Astrophysics in the Storage Ring: Background Suppressed Simultaneous Measurement of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mo stretchy="false">(</mml:mo><mml:mi>p</mml:mi><mml:mo>,</mml:mo><mml:mi>γ</mml:mi><mml:mo stretchy="false">)</mml:mo></mml:mrow></mml:math> and <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mo stretchy="false">(</mml:mo><mml:mi>p</mml:mi><mml:mo>,</mml:mo><mml:mi>n</mml:mi><mml:mo stretchy="false">)</mml:mo></mml:mrow></mml:math> Reactions
Nuclear Astrophysics in the Storage Ring: Background Suppressed Simultaneous Measurement of and Reactions Open
We report the application of the new elimination of Rutherford elastic scattering technique for the measurement of proton-induced reaction cross sections utilizing stored ions decelerated to astrophysical energies. This approach results in…
View article: Edge-localized mode mitigation enabled by active control of pedestal density gradient with new EAST tokamak divertor
Edge-localized mode mitigation enabled by active control of pedestal density gradient with new EAST tokamak divertor Open
Mitigation of large edge-localized modes (ELMs) has been achieved by actively reducing the pedestal density gradient with the EAST new right-angled lower divertor through changing the strike point position from the vertical target to the h…
View article: Dependence of ELM instability on separatrix density in EAST long-pulse H-mode plasmas
Dependence of ELM instability on separatrix density in EAST long-pulse H-mode plasmas Open
The transition from small edge-localized modes (ELMs) to large ELMs has been repetitively observed in minute-scale long-pulse high-confinement mode (H-mode) discharges during the 2017 EAST campaign. The appearance of large ELMs is found to…
View article: Millimeter-wave high-wavenumber scattering diagnostic developments on EAST and NSTX-U
Millimeter-wave high-wavenumber scattering diagnostic developments on EAST and NSTX-U Open
A pioneering 4-channel, high-k poloidal, millimeter-wave collective scattering system has been successfully developed for the Experimental Advanced Superconducting Tokamak (EAST). Engineered to explore high-k electron density fluctuations,…
View article: Forecast Analysis of Astrophysical Stochastic Gravitational Wave Background beyond general relativity: A Case Study on Brans-Dicke Gravity
Forecast Analysis of Astrophysical Stochastic Gravitational Wave Background beyond general relativity: A Case Study on Brans-Dicke Gravity Open
Scalar-tensor gravity, exemplified by Brans-Dicke (BD) gravity, introduces additional scalar polarization modes that contribute scalar radiation alongside tensor modes. We conduct a comprehensive analysis of how gravitational wave generati…
View article: Gyro-kinetic simulations of trapped electron collision effects on low-frequency drift-wave instabilities in tokamak plasmas
Gyro-kinetic simulations of trapped electron collision effects on low-frequency drift-wave instabilities in tokamak plasmas Open
Low-frequency drift-wave instabilities play a crucial role in the radial transport of present-day tokamaks, and trapped electron collisions can significantly influence these instabilities. In this paper, the effects of trapped electron col…
View article: Front-End Electronics of CXPD for Measuring Transient X-Ray Sources
Front-End Electronics of CXPD for Measuring Transient X-Ray Sources Open
The low-energy polarization detector (LPD), a payload of the POLAR-2 mission, is a soft X-ray polarization detector with a wide field of view and a large array aimed at measuring X-ray transients. These transients exhibit rapid intensity c…
View article: Long-pulse H-mode operation with stored-energy monitoring for detachment feedback control with a new lower tungsten divertor in EAST
Long-pulse H-mode operation with stored-energy monitoring for detachment feedback control with a new lower tungsten divertor in EAST Open
One of the key challenges for future fusion research is to mitigate the high steady-state heat load on the divertor target plates, and divertor detachment offers a promising solution. The Experimental Advanced Superconducting Tokamak (EAST…
View article: A new electromagnetic probe array diagnostic for analyzing electrostatic and magnetic fluctuations in EAST plasmas
A new electromagnetic probe array diagnostic for analyzing electrostatic and magnetic fluctuations in EAST plasmas Open
A novel electromagnetic probe array (EMPA) diagnostic, which consists of a magnetic probe array and an electrostatic probe array, has recently been developed on EAST. The EMPA is fixed near the first wall at horizontal port P. The magnetic…
View article: Edge turbulence transport during ELM suppression with n = 4 resonant magnetic perturbation on EAST
Edge turbulence transport during ELM suppression with n = 4 resonant magnetic perturbation on EAST Open
The edge turbulence characteristics and the induced radial transport have been investigated in edge localized mode (ELM) suppression by using the 4 resonant magnetic perturbation coils on EAST, with 3.6 and the electron collision…
View article: A Search for Low-mass Dark Matter via Bremsstrahlung Radiation and the Migdal Effect in SuperCDMS
A Search for Low-mass Dark Matter via Bremsstrahlung Radiation and the Migdal Effect in SuperCDMS Open
In this paper, we present a re-analysis of SuperCDMS data using a profile likelihood approach to search for sub-GeV dark matter particles (DM) through two inelastic scattering channels: bremsstrahlung radiation and the Migdal effect. By co…
View article: Linear simulation of magnetohydrodynamic plasma response to three-dimensional magnetic perturbations in high-β <sub>P</sub> plasmas
Linear simulation of magnetohydrodynamic plasma response to three-dimensional magnetic perturbations in high-β <sub>P</sub> plasmas Open
We report the numerical analyses of the linear magnetohydrodynamics (MHD) plasma response to applied three-dimensional magnetic perturbations (MPs) in a joint DIII-D/EAST collaboration on high- β P (poloidal beta) plasmas, utilizing the ex…
View article: Effects of recycling neutral on density shoulder formation in tokamak plasmas
Effects of recycling neutral on density shoulder formation in tokamak plasmas Open
Towards a physical understanding of the formation of flattened upstream scrape-off-layer (SOL) density profiles, namely ‘density shoulders’, a self-consistent one-dimensional radial transport model has been developed to estimate the upstre…
View article: Application of a newly developed radial directional electron probe to the edge unidirectional electron current measurement in EAST
Application of a newly developed radial directional electron probe to the edge unidirectional electron current measurement in EAST Open
A newly developed radial directional electron probe (DEP) has been applied to the unidirectional electron current measurement on EAST tokamak. The DEP consists of two radial arrays of channels which have opposite directions and align along…
View article: Sustained edge-localized-modes suppression and radiative divertor with an impurity-driven instability in tokamak plasmas
Sustained edge-localized-modes suppression and radiative divertor with an impurity-driven instability in tokamak plasmas Open
We report simultaneous control of the large edge localized modes (ELMs) and divertor heat fluxes in a metal wall environment is a critical issue for steady-state operation of a tokamak fusion reactors. Here we report a sustained ELM suppre…
View article: Enhancement of edge turbulence concomitant with ELM suppression during boron powder injection in EAST
Enhancement of edge turbulence concomitant with ELM suppression during boron powder injection in EAST Open
A reproducible, quasi-stationary edge localized mode (ELM)-suppressed scenario was obtained over a wide range of plasma parameters by continuous injection of boron (B) powder into an upper-single null discharge in the experimental advanced…
View article: Effect of ∇<i>B drift</i> on the H-mode power threshold in upper single null plasmas with ITER-like tungsten divertor on EAST
Effect of ∇<i>B drift</i> on the H-mode power threshold in upper single null plasmas with ITER-like tungsten divertor on EAST Open
In this paper, we will experimentally investigate the power threshold (PL-H) in upper single null plasmas with an ITER-like tungsten divertor under different ∇B drift directions on EAST [F. Ding et al., Commissioning and PSI Behavior of th…
View article: Dynamics of the pedestal in the recovery phase between type-III ELMs
Dynamics of the pedestal in the recovery phase between type-III ELMs Open
Dynamics of the pedestal between type-III ELMs have been studied by a particular designed four-step probe array on HL-2A tokamak. The recovery of the edge transport barrier (ETB) can be divided clearly into three different phases. Inconsis…
View article: Issue Information
Issue Information Open
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