As the scale of the EIC project continues to grow, beam-beam simulations incorporating increasingly realistic models are becoming essential. Consequently, a high-performance and extensible simulation code is indispensable. In this contribution, we report on our progress in developing a GPU-parallelized weak-strong beam-beam tracking code in the Julia programming language.
In this work, we develop a generalized theoretical framework for the beam-beam force generated by a Gaussian beam with six-dimensional coupling. We develop numerical techniques for its evaluation and present a formulation for particle tracking under the influence of this force.
A new Higher Order Mode (HOM) damper was designed and is undergoing testing for the Booster accelerator cavity at Fermilab. In anticipation of the PIP-II upgrade, it was discovered that the higher intensity of PIP-II may cause beam instability due to an excited mode at 106 MHz. This unfortunately corresponds with the cavity’s 2nd order harmonic mode, which will sweep from 86-105.7 MHz. The new...
For Jefferson Lab’s 22¿GeV upgrade, two new permanent-magnet Fixed-Field Alternating Gradient (FFA) arcs will be integrated to serve the accelerator’s six highest-energy recirculation passes. Connecting these FFA arcs to the existing linear accelerator (linac) requires a carefully engineered transition section. The current design has two parts where the first part adiabatically matches the...
Instabilities in room temperature accelerator RF cavities due to interaction between electromagnetic RF field and mechanical vibrational modes of the cavity has been observed in 1960s [1,2]. In superconducting RF (SRF) cavities these types of instabilities may be even stronger because of larger beam loading factor (Q_L), large cavity field, and stronger effects of cavity de-tuning due to...
Ultrafast electron diffraction (UED) probes structural dynamics on femtosecond timescales and angstrom spatial scales. Artificial crystals are a novel experimental target for UED beams. Typically composed of lattice-mismatched atomic layers, the repeating atomic patterns in artificial crystals can have periods several nanometers in length, which produces intricate satellite features in the...
A transfer line has been designed for the Electron-Ion Collider (EIC) to transport electron bunches from the linac to the Rapid Cycling Synchrotron (RCS). In its initial operational stage, the line accommodates 1¿nC electron bunches directly from the linac. To support a future upgrade involving a Beam Accumulator Ring (BAR), which will stack individual bunches to form high-charge 28¿nC...
