HELIX

HELIX is a balloon-borne experiment designed to measure the chemical and isotopic abundances of light cosmic ray nuclei. Measurements by HELIX, especially of 10 Be from 0.2 GeV/n to beyond 3 GeV/n, will provide an essential set of data for the study of propagation processes of the cosmic rays. HELIX consists of a 1 Tesla superconducting magnet with a high-resolution drift-chamber tracker, time of flight detector, and a ring-imaging Cherenkov detector. The instrument is planned to have a long-duration balloon flight during an upcoming northern or southern hemisphere balloon campaign.