| Autor: |
Zhao Yanping, Chen Gen, Wang Lei, Yuan Shuai (袁帅), Zhang Xinjun, Cheng Yan(程艳), Mao Yuzhou, Ryuhei Kumazawa, Deng Xu, Lei Ye, JU Songqing (琚松青), Qin Chengming |
| Rok vydání: |
2013 |
| Předmět: |
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| Zdroj: |
Plasma Science and Technology. 15:261-265 |
| ISSN: |
1009-0630 |
| Popis: |
An Ion Cyclotron Range of Frequency (ICRF) system with a radio frequency (RF) power of 4 × 1.5 MW was developed for the Experimental Advanced Superconducting Tokamak (EAST). High RF power transmitters were designed as a part of the research and development (R&D) for an ICRF system with long pulse operation at megawatt levels in a frequency range of 25 MHz to 70 MHz. Studies presented in this paper cover the following parts of the high power transmitter: the three staged high power amplifier, which is composed of a 5 kW wideband solid state amplifier, a 100 kW tetrode drive stage amplifier and a 1.5 MW tetrode final stage amplifier, and the DC high voltage power supply (HVPS). Based on engineering design and static examinations, the RF transmitters were tested using a matched dummy load where an RF output power of 1.5 MW was achieved. The transmitters provide 6 MW RF power in primary phase and will reach a level up to 12 MW after a later upgrade. The transmitters performed successfully in stable operations in EAST and HT-7 devices. Up to 1.8 MW of RF power was injected into plasmas in EAST ICRF heating experiments during the 2010 autumn campaign and plasma performance was greatly improved. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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