Abstract
With the development of science and technology, the study of the magnetic field is more and more attention by the people, and it is very important that how to measure exact. Physics is in the physics most develops, the content to be richest, one of theory most complete disciplines. Magnetic focusing for high-precision measurement is used more and more widely. In this paper, the method how to measure the magnetic field by the magnetic focusing has been studied both theoretically and experimentally. It is discussed from the effect and background of the magnetic field, the principle, application, and the uncertain factors of magnetic focusing. According to the existing laboratory equipment to design, then it measures magnetic field in Hangzhou. Measurement methods include the deflection and zero-field method. The paper also describes some other method that how to measure magnetic field, and gets a relatively accurate data.
Keywords: Geomagnetic field; Measure; Magnetic focusing method; Electron specific charge