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Description
A dipole magnet is one of the important components in particle accelerator systems. It can be used to transport a charged particle beam with desired deflecting angle and direction. Moreover, it is often utilized as a part of an energy spectrometer. This research focuses on simulation and measurement of the dipole magnet, which will be used to measure the electron beam energy produced from the 4 MeV RF linear accelerator (linac) for natural rubber vulcanization at the Plasma and Beam Physics Research Facility in Chiang Mai University. The research activities are divided into three main parts. The first part focuses on 3-dimensional simulation of the dipole magnet by using the RADIA program. The three components of the magnetic field (B$_\text{x}$, B$_\text{y}$, B$_\text{z}$) can be derived from the 3D model. The second part is the magnetic field measurements of the magnet after the construction. Then, the simulation and the measurement results are compared. The maximum magnetic field of about 0.2088 mT can be obtained with an excitation current of 3 A. The last part focuses on the electron beam dynamic study by using a program called A Space Charge Tracking Algorithm (ASTRA) to track the particles through the magnetic field distribution. The simulation data provides 6-dimensional coordinates (x, y, z, p$_\text{x}$, p$_\text{y}$, p$_\text{x}$) of the particles at the desired position downstream the dipole magnet. The results of this research can then be used to design a proper energy measuring system.
