Double Quarter Wave Crab Cavity Wire Stretching Measurement at BNL

TL;DR

This paper reports on the successful wire stretching measurement of a prototype Double Quarter Wave crab cavity at BNL, validating the measurement system and ensuring precise wire placement for cavity calibration.

Contribution

It presents the first implementation and validation of a wire stretching measurement system for a DQW crab cavity at BNL.

Findings

All wire locations were on the same plane, confirming measurement accuracy.

The measurement system was validated through successful calibration.

Offset errors were quantified to assess measurement precision.

Abstract

The wire stretching measurement was completed on the prototype Double Quarter Wave (DQW) crab cavity for operation practice and calibration of the measurement system. Four locations were defined to be on the electrical center plane of the crab cavity, and survey of the wire indicated all are on the same plane. The successful measurement validated the wire stretching system built at Brookhaven National Lab. The offset of the four wire locations to the fitted plane provided the error of the measurement.