Construction and Simulation Bias Study of The Guide Tube Calibration System for JUNO

TL;DR

This paper reports on the construction, testing, and simulation bias analysis of the Guide Tube Calibration System for JUNO, ensuring accurate energy response measurement and evaluating risks associated with simulation errors.

Contribution

It introduces a new calibration system for JUNO and analyzes the impact of simulation bias on energy measurement accuracy.

Findings

Successful construction and lab testing of GTCS

Identification of the influence of simulation bias on energy measurement

Validation of calibration algorithm robustness

Abstract

A Guide Tube Calibration System (GTCS) has been designed for the Jiangmen Underground Neutrino Observatory (JUNO), in order to measure the detector energy response near the outer radius of the active volume. Recently, a prototype system has been constructed and tested, and the calibration algorithm has also been studied to evaluate the risk when the simulation tuning and the error control fail. In this paper, we first report its construction and the performance tests in the lab. Then the influence on the global energy measurement caused by the simulation bias of GTCS is discussed, in order to make sure the algorithm is qualified.