In the spring of 1931, Lawrence received his first grant from the National Council for Scientific Research, which allowed research to progress rapidly. He had M.S. Livingston make a miniature cyclotron, 11.43 centimeters in diameter (referring to the vacuum chamber), and added less than 1,000 volts to the two D-shaped electrodes to get an accelerating effect of 80,000 volts. Soon, the size of the cyclotron is increasing, but also into the era of standardized design and construction. Cyclotron is not only an important equipment in nuclear physics tests, but also has a wide range of industrial, medical and other uses.