Paper  Title  Page 

MOPWA018  CWtype HV Power Supply of 50 Hz and its Application in Accelerator Power Supply  699 


Funding: The Knowledge Innovation Program of Chinese Academy of Sciences The highvoltage power supply is an integral part of accelerator technology, as its stable and reliable output is an important guarantee for accelerator properly working. In a number of engineering practice of accelerator design and construction, we tried to use the CockcroftWalton (CW) type of power supply driven by 50 Hz and got success. It is of simple structure, low cost, easy maintenance, and high efficiency. This report describes the technical difficulties and the solutions in the CWtype power supply driven by 50 Hz. It also gives an introduction of the latest design of 800 kV/30 mA electron accelerator, which is being assembled at SINAP. Recent work has shown that it is an option to choose 50 Hz driven power system when it is more lenient on the voltage ripple but needed to be as high as possible on the energy conversion efficiency. 

THPWA021  Studies of Density Distribution and Emittance Measurement for High Current Electronic Beam  3672 


Beam density distribution and emittance are the important parameters of an accelerator. The accurate emittance measurement has an important reference significance for the design of accelerating tube, and provides a design basis for the aperture size of accelerating tube. This paper introduces a beam measurement method which uses multiwire, can rotate in the horizontal plane and adjust in the Z coordinate. The results of simulation show that this method can accurately measure the beam density distribution and emittance, and the accuracy can meet the requirements of applied accelerator.  
THPWA022  An 800kV 30mA LineFrequency CockcroftWalton Dc Generator Using Gas Insulated Transformer for Radiation Application  3675 


The design and construction of a linefrequency 800 kV CockcroftWalton DC generator using gas insulated transformers are described, as well as the motive to develop it into radiation application. Several features are underlined, preliminary test results of the prototype presented and some problems encountered discussed.  