Understanding the 3D collective long-term response of beams exposed to resonances is of
theoretical interest and essential for advancing high intensity synchrotrons. This study of a …

The existence of a structural resonance stop band caused by space charge in high-current
beams, where the resonance frequency is associated with 90° phase advance per focusing …

In a particle accelerator with a periodic structure beam space charge force may excite
resonant beam emittance growth if the particle's transverse phase advance approaches 90° …

The aim of this study is to make the parameter space of zero-current phase advance greater
than 90° available to the high-intensity linear accelerator (linac) design and operation, which …

The space-charge driven envelope instability can be of great danger in high intensity
accelerators and was studied using a two-dimensional (2D) envelope model and three …

In high intensity linacs emittance exchange driven by space charge coupling may lead to the
well-known “equipartitioning” phenomenon if the stop band at σ‖= σ⊥ is crossed at …

The well-known envelope instability or the second order even collective mode [I. Hofmann,
Phys. Rev. E 57, 4 (1998)] and the fourth order resonance 4 σ= 360° due to the nonlinear …

In this paper we present the first quantitative measurement of the change in frequency (tune)
with intensity of four transverse resonances in a high intensity Gaussian beam. Due to the …

Since the finding of the space charge fourth order 4σ= 360° resonance [Jeon et al., 2009 [3]],
studies have been carried out to better understand the fourth order resonance and the …

In the construction of high intensity accelerators, it is the utmost goal to minimize the beam
loss by avoiding or minimizing contributions of various halo formation mechanisms. As a …