Study on space-charge effects of intense current in electrostatic accelerating tube

This paper studies the space-charge effect of intense current in electrostatic accelerating tube based on 5 hypothese, including the potential distribution in and out beam, the impact on the axial potential by space charge and the transport of intense current. The results show that the radial potential curves of inner beam are all parabolas and they reach the minimum on the axis. The relationship between space-charge fields and the beam radius is linear.The space-charge causes not only the decrease of axial potential, but also the divergency of beam, especially at the low speed of electron. One of the key points lies in the design of the front fields of electrostatic accelerating tube when the space-charge effects are considered, and the fields change of high current tube is greater than t