The comprehensive problem D of the 9th National Undergraduate Physics Experiment Competition(Zhuhai Division)was to measure the charge of trapping charged particles by Paul trap.By applying an electric field with specific frequency and amplitude within a Paul trap,the contestants needed to stably trap charged particles on macro scale and used photoelectric devices to implement ob-servation and measurement on the charged particles.More than 90％of contestants could successfully construct optical path and circuits,and stably trap a significant number of charged particles,achieve the design purpose of the competition experiment.Regarding error analysis and the final charge calcu-lation,only a small number of contestants were able to perform well,indicating that the ability to flexibly apply physical principles to mathematical modeling of experimental system needed to be im-proved.This test exhibited clear levels in difficulty,assessed students'comprehensive mastery of op-tics,electronic circuits,electromagnetism,and the use of general instruments for university physics experiments,as well as the students'potential for engaging in advanced exploration and innovative re-search.
关键词
Paul阱/四极杆阱/带电微粒/电荷测量
Key words
Paul trap/quadrupole trap/charged particle/charge measurement
维普
万方数据