Neutron imaging techniques were investigated at Peking University based on a 4.5 MV Van de Graaff accelerator.The thermal neutron radiography,fast neutron radiography and fast neutron resonance radiography were tested...Neutron imaging techniques were investigated at Peking University based on a 4.5 MV Van de Graaff accelerator.The thermal neutron radiography,fast neutron radiography and fast neutron resonance radiography were tested.The low neutron flux limits the image quality.A new radio frequency quadrupole (RFQ) accelerator based on neutron source with a yield of 1 012 n/s is being set up.展开更多
There are a few assistant heating objects included electron cyclotron resonate heating （ ECRH ）. Two 500 kW gyrotrons introduced from Russia were operated to launch 1 MW energy. So two set of TZ-2 high voltage puls...There are a few assistant heating objects included electron cyclotron resonate heating （ ECRH ）. Two 500 kW gyrotrons introduced from Russia were operated to launch 1 MW energy. So two set of TZ-2 high voltage pulse modulators are needed.展开更多
Electron cyclotron resonance heating （ECRH） is one of the main auxiliary heating schemes for the HL-2A tokamak. Routinely, the ohmic heating can provide a heating power about 300-450 kW in this device （ estimated f...Electron cyclotron resonance heating （ECRH） is one of the main auxiliary heating schemes for the HL-2A tokamak. Routinely, the ohmic heating can provide a heating power about 300-450 kW in this device （ estimated from that the total toroidal current is about 300 kA while the totoidal voltage is 1-1.5 V）. The total power for the ECRH now is 1 MW and in future 2 MW.展开更多
基金supported by National Natural Science Foundation of China(No.10735020No.10575006)
文摘Neutron imaging techniques were investigated at Peking University based on a 4.5 MV Van de Graaff accelerator.The thermal neutron radiography,fast neutron radiography and fast neutron resonance radiography were tested.The low neutron flux limits the image quality.A new radio frequency quadrupole (RFQ) accelerator based on neutron source with a yield of 1 012 n/s is being set up.
文摘There are a few assistant heating objects included electron cyclotron resonate heating （ ECRH ）. Two 500 kW gyrotrons introduced from Russia were operated to launch 1 MW energy. So two set of TZ-2 high voltage pulse modulators are needed.
文摘Electron cyclotron resonance heating （ECRH） is one of the main auxiliary heating schemes for the HL-2A tokamak. Routinely, the ohmic heating can provide a heating power about 300-450 kW in this device （ estimated from that the total toroidal current is about 300 kA while the totoidal voltage is 1-1.5 V）. The total power for the ECRH now is 1 MW and in future 2 MW.
