The Study And Design Of Power Supply Of DNB

Confined fusion is one of the most important ways for finally solving mankind's demand for energy without polluting the environment. Confined fusion research has achieved great progress as result of the efforts devoted to fusion research over a half century. For achieving confined fusion (deuteriuma and tritium confusion), there must have two conditions : (l)enough high temperature of the plasma, need more than 10kev.(2)the product of the density of the plasma and the time of the power's restriction is bigger than (2-4) *10~14 cm~-3.s.We can see the quest of the state of the plasma is very strict, so it is important to detect the states of the plasma. DNB is one of efficiency ways for detecting. DNB means diagnostic neutral beam. By inject one neutral beam inside the plasma, it can detect some states of the plasma .This system is already built in FRC (fusion research center of the university of Texas) and achieve good result. It mainly consists of two parts: the system of vacuum and the system of power supply. The whole system of DNB can work properly is based on the power supply, so how to control the power supply is too important.First this article introduces the whole makeup of the DNB system and the structure of the power supply, then expatiate the control system of power supply for three segments:1. rebuild the negative power supply of ECRH2. the Timer and MCL(Master Control Logical)3. the control system of states based on PLCAt last describe how to debug this control system and give the debugging waves with load.