Device and method for generating controllable vortex electron beam

• Main Authors: SUN TULAI, DU KAI, CHEN QIONGYANG, REN TIANXING, TIAN HE, CHEN XINKAI, CHEN XING
• Format: Patent
• Language: Chinese; English
• Published: 17.04.2018
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS; ELECTRICITY

The invention discloses a TEM based device for generating a controllable vortex electron beam. The device is characterized by comprising an electron gun for generating a planar electron beam, a magnetic field controller, and a magnetic needle wound by a conductive coil; the magnetic needle is arranged on a planar electron beam channel via a chip controlled by electrical equipment; the magnetic field controller generates an intensity controllable magnetic field; and the magnetic field is used to modulate the phase of the planar electron beam. The invention also discloses a method for generatingthe controllable vortex electron beam via the device. The device can form magnetic field distribution similar to magnetic monopole in an electronic microscope, so that the vortex electron beam with single track angular momentum and controllable quantum number is obtained. 本发明公开了种基于TEM产生可控涡旋电子束的装置，其特征在于，包括电子枪，产生平面电子束；磁场控制器；绕有导电线圈的磁针，通过有电学设备控制的芯片设置于平面电子束通道上，所述磁场控制器产生强度可控的磁场，所述磁场用于调制所述平面电子束的相位。本发明还公开了种利用上述装置产生可控涡旋电子束的方法。该装置