Experiments on formation of spherical tokamak (ST) plasmas by electroncyclotron heating (ECH) alone without a central OH solenoid have been carried out on LATE (LowAspect ratio Torus Experiments). By injecting a 2.45 ...Experiments on formation of spherical tokamak (ST) plasmas by electroncyclotron heating (ECH) alone without a central OH solenoid have been carried out on LATE (LowAspect ratio Torus Experiments). By injecting a 2.45 GHz microwave pulse of 6.3 kW for 4 seconds, aplasma current is initiated and ramped up to I_p approx= 3 kA, and finally maintained for 1 secondby adjusting the external vertical field. Magnetic measurements show that closed flux surfaces areformed and the last closed flux surface has an aspect ratio of A ～ 1.3 and an elongation of κ～1.3. The electron density measured by an interferometer is more than 1.5 x 10^(11) cm^(-3) whichexceeds twice of the plasma cut-off density, suggesting that electron cyclotron heating bymode-converted electron Bernstein waves may take place.展开更多
Particle type dependences of hadron yield and emission patterns,especially its difference be- tween mesons and baryons,at intermediate pT(2—5GeV/c)is one of the findings in heavy ion collisions at RHIC.A systematic s...Particle type dependences of hadron yield and emission patterns,especially its difference be- tween mesons and baryons,at intermediate pT(2—5GeV/c)is one of the findings in heavy ion collisions at RHIC.A systematic study of identified hadron production was performed in Au+Au/Cu+Cu collisions at S_(NN)^(1/2)=62.4/200GeV,to investigate the possible origins of this difference.In this paper,we show particle ratios,elliptic flow strengths,and their scaling properties.展开更多
文摘Experiments on formation of spherical tokamak (ST) plasmas by electroncyclotron heating (ECH) alone without a central OH solenoid have been carried out on LATE (LowAspect ratio Torus Experiments). By injecting a 2.45 GHz microwave pulse of 6.3 kW for 4 seconds, aplasma current is initiated and ramped up to I_p approx= 3 kA, and finally maintained for 1 secondby adjusting the external vertical field. Magnetic measurements show that closed flux surfaces areformed and the last closed flux surface has an aspect ratio of A ～ 1.3 and an elongation of κ～1.3. The electron density measured by an interferometer is more than 1.5 x 10^(11) cm^(-3) whichexceeds twice of the plasma cut-off density, suggesting that electron cyclotron heating bymode-converted electron Bernstein waves may take place.
文摘Particle type dependences of hadron yield and emission patterns,especially its difference be- tween mesons and baryons,at intermediate pT(2—5GeV/c)is one of the findings in heavy ion collisions at RHIC.A systematic study of identified hadron production was performed in Au+Au/Cu+Cu collisions at S_(NN)^(1/2)=62.4/200GeV,to investigate the possible origins of this difference.In this paper,we show particle ratios,elliptic flow strengths,and their scaling properties.
