CAJ | 학술논문

为精确、快速测量波荡器磁场积分，研制了一套基于拉伸线法的测磁系统。该系统采用Agilent 3458A八位半数字万用表实现微电压信号采集，使用 Kohzu 高精度位移平台实现拉伸线的精确同步移动，测量软件平台采用LabVIEW实现。使用测磁系统在一台7周期混合永磁型波荡器样机上进行了测量实验，结果同霍尔探头点测吻合，一次积分和二次积分的重复测量精度分别优于2.5′10-6 T·m和2.5′10-6 T·m2。该系统将用于华中科技大学在研的一套紧凑型THz波段自由电子激光装置中波荡器磁场测量。
위정학、쾌속측량파탕기자장적분，연제료일투기우랍신선법적측자계통。해계통채용Agilent 3458A팔위반수자만용표실현미전압신호채집，사용 Kohzu 고정도위이평태실현랍신선적정학동보이동，측량연건평태채용LabVIEW실현。사용측자계통재일태7주기혼합영자형파탕기양궤상진행료측량실험，결과동곽이탐두점측문합，일차적분화이차적분적중복측량정도분별우우2.5′10-6 T·m화2.5′10-6 T·m2。해계통장용우화중과기대학재연적일투긴주형THz파단자유전자격광장치중파탕기자장측량。
Background:In collaboration with the National Synchrotron Radiation Laboratory, Huazhong University of Science and Technology is developing an oscillator-based THz free-electron laser (HUST THz-FEL).Purpose: In order to measure the magnetic field integrals of the undualtor accurately and quickly, a measurement system based on the stretch-wire method (SWM) was established.Methods:In the system, an eight and a half digital multimeter, Agilent 3458, was adopted to acquire the micro-volt voltage signal, and a Kohzu high precision positioning platform was employed to realize the high synchronized wire movement. The software of this system was implemented by LabVIEW programmingResults: The field measurement system was tested in a prototype hybrid permanent undulator with 7 periods, which shows consistent results with the Hall probe mapping. The repeatability precision for first integral and second integral are better than 2.5′10-6 T·m and 2.5′10-6 T·m2 respectively.Conclusion: The system met the design requirements and will be applied to the compact THz FEL oscillator located in Huazhong University of Science and Technology.