The High Energy Light Isotope eXperiment (HELIX) is a balloon-borne superconducting magnet
spectrometer designed to measure abundances of light cosmic-ray isotopes. HELIX which under-
took its first engineering flight in the Spring of 2024, identifies cosmic rays through measurements
of their velocity, rigidity and charge. These measurements and in particular measurements of
beryllium isotopes up to 10 GeV/n will be used to investigate cosmic-ray propagation models.
The magnetic rigidity measurements are performed using a Drift Chamber Tracker (DCT), housed
within a 1 Tesla superconducting magnet which deflects incoming cosmic rays. Three planes each
containing seventy-two layers of sense wires are used to measure the positions of the deflected
cosmic rays with a spatial resolution goal of 70 𝜇𝑚 for Z>3. To ensure a precise gas composition
and drift field a collection of housekeeping sensors was used, resulting in the DCT performing
successfully in the flight. Presented here are details of the design and construction of the DCT as
well as calibration and preliminary analysis of flight data.