LINAC2024 - 32nd Linear Accelerator Conference

Multipacting with space charge: stability and saturation of a non linear dynamic system

TUPB063

27 Aug 2024, 16:00

2h

Boulevard (Hilton Chicago)

Poster Presentation MC1.1 Beam Dynamics, beam simulations, beam transport Tuesday Poster Session

Speaker

Andrea Pisent (Istituto Nazionale di Fisica Nucleare)

Description

The phenomenon of multipacting happens when in an RF cavity or wave guide electrons, randomly generated on the surfaces mainly by secondary emission and accelerated by the RF field, find e periodic and stable condition able to sustain the discharge. It is particularly detrimental for long pulse operation as in high intensity hadron linacs. An original view point for the associated dynamical system is here developed, with focus on the definition of stability conditions and on the role of space charge in the saturation of the discharge intensity. Moreover in the case of a resonant cavity the electron "beam loading" effect is analyzed.