Fast beam stacking using RF barriers

TL;DR

This paper reports on the development and testing of RF barrier systems at Fermilab that enable efficient beam stacking by combining stationary and moving barriers, effectively doubling beam intensity.

Contribution

Introduction of a novel RF barrier system for beam stacking in the Fermilab Main Injector, demonstrating continuous beam deflection and stacking capabilities.

Findings

Successful fabrication and testing of RF barriers at 8 kV and 90 kHz

Effective beam stacking achieved, doubling beam intensity

Potential for improved beam accumulation in accelerators

Abstract

Two barrier RF systems were fabricated, tested and installed in the Fermilab Main Injector. Each can provide 8 kV rectangular pulses (the RF barriers) at 90 kHz. When a stationary barrier is combined with a moving barrier, injected beams from the Booster can be continuously deflected, folded and stacked in the Main Injector, which leads to doubling of the beam intensity. This paper gives a report on the beam experiment using this novel technology.