To accelerate intense, short pulsed heavy ion beams to the energies of interest for studies of high energy density physics and warm dense matter, the Pulse Line Ion Accelerator (PLIA), of which the axial acceleration gradient can achieve several MeV per meter with realistic helix parameters at very low cost, was developed in recent years. A simple prototype of PLIA for a proof-of-principle experiment called the Lanzhou Test PLIA was designed and constructed at the Institute of Modern Physics in Lanzhou, and the test result matches the calculated result well. The pattern of the axial electric field Ez and the velocity of the traveling wave were simulated by CST.

DG-series industrial electron accelerators of intermediate frequency transformer type have been successfully researched and developed in the Institute of Modern Physics,Chinese Academy of Science. The DG-2.5 accelerator with beam energy range of 1.0-2.5MeV,maximum beam power of 90 kW and length of extraction window up to 1000 mm,is suitable for many kind uses of the radiation technology. DG-1.2 accelerator,another type with beam energy range of 0.8-1.2 MeV and beam power of 50 kW,was also designed and constructed. The two accelerators have been tested with long-term operations. They were proved as E-beam irradiators of high reliability,very low malfunction rates and high efficiency.

The Ripple coefficient is one of the important factor for the stability of industrial high voltage electron accelerator.Accelerator can't work well when the ripple coefficient is high.The increment of the measured ripple values becomes very large with the increase of the accelerator load current.From the simulation with finite element method of high voltage generator,we found that the leakage magnetic field was the most important reason for the results of ripple measurement.The ripple was measured after changing the frame of the high voltage generator to suppress the leakage magnetic field.It can be concluded that the actual value is acceptable to the accelerator and the measured high ripple coefficient is not the reason of malfunction of this high power electron accelerator.

A 1.2 MeV/40 mA electron accelerator based on a single-phase transformer-rectifier without iron core and with a particle accelerating tube arranged on its axis and beam current power up to 50 kW was designed and manufactured for the radiation technology.The DC high voltage was generated by 37 cascaded full-wave,voltage-doubling rectifying circuits which were supplied by alternating voltage inducting from the primary winding exciting with 400 Hz intermediate frequency AC.The electron gun adopted an indirect heating type LaB6 as the cathode emitter and the control system was constructed by the industrial PLC.The specific features of this accelerator are compact of structure,and the energy and beam current instability are all less than ±5%.The electric power conversion efficiency is higher than 65%.It has already passed test running of 8 hours now.

张力调节装置是电子束辐照交联电线电缆生产线传输系统实现速度同步的关键部件.装置有多种类型,合理配置不同形式的张力调节装置,可保证生产线正常运行和提高产品的质量.对两种立式张力调节装置的工作原理、特点进行了论述,并对如何建立张力进行了分析阐述.