Speaker
Description
State Power Investment Corporation (SPIC) is leading a project that uses cyclotron for proton irradiate power chips. Compared to electrostatic accelerator, cyclotron have the advantage of lower cost and higher beam intensity. However, a disadvantage of cyclotron is that the extracted beam has relatively large energy dispersion. For horizontally placed power chips, the beam must be injected vertically. Therefore, the cyclotron beam extracted along the horizontal direction must undergo a 90-degree deflection to reach the irradiation terminal. Traditional 90-degree bending magnets, when handled with the large energy dispersion of the cyclotron beam, can cause significant beam loss, especially at low energies.
This report presents the progress in the development of a 270-degree achromatic bending magnet suitable for this application. In the past, this type of magnet has typically been used in electron beamline and when attempting to apply it to proton beamline, corresponding optimizations to its theoretical design are needed to make it more economically efficient in terms of weight and power consumption. This report introduces the theoretical design of this type of magnet prototype, compares its beam transport with that of a 90-degree bending magnet, presents manufacturing and magnetic measurement results, and discusses the actual beam test results.
