Characterization and Comparison of Control Units for Piezo Actuators to be used for Lorentz Force Compensation inth ILC

Bhattacharyya, Sampriti ; Pilipenko, Roman ; /Fermilab

关键词: ACCELERATORS;    ACTUATORS;    AMPLIFIERS;    AVAILABILITY;    CAVITIES;    ELECTRIC FIELDS;    FERMILAB;    HELIUM;    LINEAR COLLIDERS;    LORENTZ FORCE;    MANUFACTURING;    POWER AMPLIFIERS;    RELIABILITY;    RESONANCE;    TUNING Accelerators;   

DOI  :  10.2172/971688
RP-ID  :  FERMILAB-TM-2454-TD
PID  :  OSTI ID: 971688
Others  :  TRN: US1001451

学科分类：核物理和高能物理

美国|英语

来源: SciTech Connect

【 摘 要 】

Superconducting accelerators, such as the International Linear Collider (ILC), rely on very high Q accelerating cavities to achieve high electric fields at low RF power. Such cavities have very narrow resonances: a few kHz with a 1.3GHz resonance frequency for the ILC. Several mechanical factors cause tune shifts much larger than this: pressure variations in the liquid helium bath; microphonics from pumps and other mechanical devices; and for a pulsed machine such as the ILC, Lorentz force detuning (pressure from the contained RF field). Simple passive stiffening is limited by many manufacturing and material considerations. Therefore, active tuning using piezo actuators is needed. Here we study a supply for their operation. Since commercial power amplifiers are expensive, we analyzed the characteristics of four power amplifiers: (iPZD) built by Istituto Nazionale di Fisica Nucleare (Sezione di Pisa); and a DC-DC converter power supply built in Fermilab (Piezo Master); and two commercial amplifiers, Piezosystem jena and Piezomechanik. This paper presents an analysis and characterization of these amplifiers to understand the cost benefit and reliability when using in a large scale, pulsed beam accelerator like the ILC.