Abstract
A CW microtron is made and the first beam test is done. The machine is of a racetrack type. The acceleration energy and the beam power are 5 MeV and 50 kW, respectively. The RF cavity is a conventional normal-conducting 2-cell cavity with coupling slots. The injection energy is 80 keV, and a 500 MHz CW gun is used. The bending magnets are divided into two subsections to adjust the acceleration phases of every turn. A beam test of the 500 MHz CW gun shows that a peak current is about 200 mA, and a phase width of the gun emission is about 60 degrees. The beam emittances measured agree well with the calculation results. Injection beam sizes at the center of the RF cavity are about 5 mm and 4 mm in the horizontal and vertical coordinates, respectively.
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