L. Y. Zhang

Generation and suppression of runaway electrons in EAST lower hybrid current drive experiments

In a lower hybrid current drive experiment on the EAST tokamak in the spring of 2010, the process in which fast electrons transform into runaway electrons was observed, and the way in which lower hybrid waves (LHWs) affect the behavior of runaway electrons was studied. It was found that when the power of LHWs is below a certain threshold, fast electrons excited by LHWs can be accelerated to runaway electrons due to the primary generation mechanism of runaway electrons, but when the power is high enough, fast electrons cannot transform into runaway electrons anymore. No matter how high the power was, the production of runaway electrons due to the secondary generation mechanisms was suppressed.

Active target studies of the αp-process at CRIB

The αp-process is a sequence of (α, p)(p, γ) reactions important to the nuclear trajectory to higher masses in type I X-ray bursts. Specifically, the αp-process is schematically pure helium-burning, and thus unlike pure hydrogen-burning processes, does not require slow β+ decays. Explosive helium burning is responsible for the observed short rise-times of X-ray bursts but ultimately gives way to the rp-process as the Coulomb barrier increases. Because the stellar reaction rates of these (α, p) reactions are poorly known over the relevant astrophysical energies, we performed systematic studies of the 18Ne(α,p), 22Mg(α,p) and 30S(α,p) reactions at the Center for Nuclear Study (CNS) low-energy radioactive ion beam separator, called CRIB. We produce the radioactive beams in-flight and scan the center-of-mass energy down into the Gamow Window using a thick target in inverse kinematics. The helium target gas also serves as part of the detector system, an active target, which was newly designed for these measure...

Investigation of the thermonuclear 18 Ne(α, p) 21 Na reaction rate via resonant elastic scattering of 21 Na + p

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Design and construction of the POLAR detector

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First measurement of S 30 +α resonant elastic scattering for the S 30 (α,p) reaction rate

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7Be, 8B+208Pb Elastic Scattering at Above-Barrier Energies

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Upgrade of Beijing IR-FEL project

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Instrument performance and simulation verification of the POLAR detector

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Filterscope diagnostic system on the Experimental Advanced Superconducting Tokamak (EAST)

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Proton widths of the low-lying16Fstates from the15N(7Li,6Li)16Nreaction

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