Simulated Lorentz Force Detuning Compensation With A Double Lever Tuner On A Dressed ILC/1.3 GHZ Cavity At Room Temperature

TL;DR

This paper demonstrates a double lever tuner with piezoelectric actuators to effectively compensate for Lorentz force detuning in a dressed 1.3 GHz SRF cavity at room temperature, reducing frequency shifts and RF power requirements.

Contribution

It introduces a novel double lever tuner design with dual piezoelectric actuators for improved LFD compensation in SRF cavities.

Findings

Effective LFD compensation at room temperature

Increased cavity-tuner system stiffness reduces detuning impact

Potential for reduced RF power consumption

Abstract

Pulsed SRF linacs with high accelerating gradients experience large frequency shifts caused by Lorentz force detuning (LFD). A piezoelectric actuator with a resonance control algorithm can maintain the cavity frequency at the nominal level, thus reducing the RF power. This study uses a double lever tuner with a piezoelectric actuator for compensation and another piezoelectric actuator to simulate the effects of the Lorentz force pulse. A double lever tuner has an advantage by increasing the stiffness of the cavity-tuner system, thus reducing the impact of LFD. The tests are conducted at room temperature and with a dressed 1.3 GHz 9-cell cavity.