Neutral Beam Injection (NBI) is one of the main methods for auxiliary heating of tokamak plasma. In Globus-M2 spherical tokamak, toroidal magnetic field and plasma current will more than double [1] providing an opportunity for a significant increase in plasma density. Thereby, in order to ensure the optimal depth of atomic beam penetration into the plasma before beam ionization, it is necessary to increase the energy of injected particles. For this purpose, we developed a new three-electrode ion source with peripheral magnetic field (ISPM-1M). While ISPM-1M retains the advantages of an arc discharge plasma emitter, the design of its high-voltage insulator assembly and slit ion-optical system is different from its analogues ISPM-1 and ISPM-2 [2].
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