The button electrode is one that widely used in high energy rf accelerators , such as storage ring , and the bpm made of button electrodes has many merits like high accuracy , high resolution , resisting magnetic field , simple machinery , without magnetic core and low cost , etc . so we want to use the button electrode as the bpm in high current accelerators like the lia 钮扣电极束位置探测器是一种广泛应用于射频加速器储存环等高能弱流加速器的一种束位置测量装置，它具有测量精度高、分辨率高、不受磁场干扰、机械结构简单、无磁芯、造价低廉等特点。只是，至今未见有关这种束位置探测器在强流加速器(如，直线感应加速器)上应用的报导，如能将钮扣电极束位置探测器应用于lia ，将是一件很有意义的事情。
