Possible benefit of longer $L^*$ for detectors at ILC

TL;DR

This paper explores the potential advantages of increasing the $L^*$ distance in the ILC design to improve detector operation and maintenance, addressing current support and accessibility challenges.

Contribution

It introduces the concept of longer $L^*$ optics as a solution to existing ILC detector support and operation issues.

Findings

Longer $L^*$ can ease detector support and maintenance.

Extended $L^*$ may improve detector operation stability.

Potential design modifications for longer $L^*$ are discussed.

Abstract

In the present design of ILC, $L^*$, the distance between the interaction point (IP) and the front surface of the final focusing magnet (QD0), is 4.1 m. The QD0 is supported from the detector platform by a cantilever type support or from the detector itself. This design could cause several difficulties in smooth operation of ILC or in maintenance of detectors. These difficulties could be mitigated by adopting longer $L^*$ optics. In this article, we discuss possible benefit of longer $L^*$ for detectors.