TianQin: a space-borne gravitational wave detector

TL;DR

TianQin is a proposed space-based gravitational wave detector using a constellation of spacecraft to detect millihertz frequency waves, aiming for high-confidence detection within months.

Contribution

This paper introduces the preliminary design and feasibility analysis of TianQin, a novel space-borne gravitational wave detector concept.

Findings

Feasible mission concept with current technology levels

Estimated error budget supports detection goals

Projected launch in the late 2020s or early 2030s

Abstract

TianQin is a proposal for a space-borne detector of gravitational waves in the millihertz frequencies. The experiment relies on a constellation of three drag-free spacecraft orbiting the Earth. Inter-spacecraft laser interferometry is used to monitor the distances between the test masses. The experiment is designed to be capable of detecting a signal with high confidence from a single source of gravitational waves within a few months of observing time. We describe the preliminary mission concept for TianQin, including the candidate source and experimental designs. We present estimates for the major constituents of the experiment's error budget and discuss the project's overall feasibility. Given the current level of technology readiness, we expect TianQin to be flown in the second half of the next decade.