Design and development of an ACCT for the Shanghai advanced proton therapy facility

The Shanghai advanced proton therapy facility is a proton cancer treatment device designed and built by the Shanghai Institute of applied physics at the Chinese academy of sciences.The accelerator part comprises a proton linear accelerator(linac)injector and a circular synchrotron.An alternating current current transformer(ACCT)is used for non-intercepting beam current measurement at the drift tube linac exit.According to the beam characteristics,the ACCT is required to complete real-time beam current and pulse width measurements at currents of3-30 mA,frequencies of 1-10 Hz,and pulse widths of40-400μs.In this paper,we report the design and development of an ACCT.The designed ACCT was simulated using CST Microwave Studio,and calibrated using an oscilloscope and signal generator.Variations in the output signal of the ACCT were investigated as a function of ceramic gap size,number of coil turns,and resistance.According to the simulation and experimental results,the optimal number of coil turns was found to be 30.In addition,a low-pass filter was adopted to filter the noise introduced during long-distance signal transmission using a coaxial cable with the length of 20 m.The calibration results show that the corresponding rise time of the ACCT is 800 ns with the sensitivity of 8.2 V/A and a droop of less than 1%,meeting the design requirements.

自动控制原理课程实验教学改革

自动控制原理课程为电气类学生专业必修课程,也是一门考研课程。该课程具有理论性强、知识点多、概念抽象等特点,实验教学可激发学生的学习兴趣,提高教学效果,使该课程的教学质量和教学效果达到高水平。在专业认证背景下,针对现有实验中验证性实验偏多、设计性及综合性实验偏少的现状,提出利用ACCT自控实验箱开展综合设计性实验,可锻炼学生分析、设计和解决工程实际问题的能力,确保毕业达成度对工程知识、问题分析、设计/开发解决方案、研究、使用等工程认证要求。

K3多账套控制在自定义报表中的应用

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