A Lightweight Field Cage for a Large TPC Prototype for the ILC

TL;DR

This paper presents the development of a lightweight, optimized field cage for a large prototype Time Projection Chamber intended for the International Linear Collider, focusing on material budget and field uniformity.

Contribution

It introduces a novel design of a low-material, high-homogeneity field cage for a large TPC prototype used in collider detector R&D.

Findings

Achieved a material budget of 1.21% of a radiation length.

Demonstrated field homogeneity with Delta(E)/E ≤ 10^-4.

Integrated the prototype into a test beam setup at DESY.

Abstract

We have developed and constructed the field cage of a prototype Time Projection Chamber for research and development studies for a detector at the International Linear Collider. This prototype has an inner diameter of 72 cm and a length of 61 cm. The design of the field cage wall was optimized for a low material budget of 1.21 % of a radiation length and a drift field homogeneity of Delta(E)/(E) less or equal 10^-4. Since November 2008 the prototype has been part of a comprehensive test beam setup at DESY and used as a test chamber for the development of Micro Pattern Gas Detector based readout devices.