Space Science Reviews • Vol 221 • No 8
Interstellar Dust Experiment (IDEX) Onboard NASA’s Interstellar Mapping And Acceleration Probe (IMAP)
October 2025 • M. Horányi, Scott Tucker, Z. Sternovsky, Kush Tyagi, S. Knappmiller, Ethan Ayari, Rebecca Mikula, J. R. Szalay, S. Kempf, Chip Bollendonk, R. S. Gurn…
Abstract The Interstellar Dust Experiment (IDEX) onboard NASA’s Interstellar Mapping and Acceleration Probe (IMAP) is dedicated to measuring the flux, size distribution, and composition of Interstellar (ISD) and Interplanetary (IDP) Dust Particles while stationed at Lagrange point L1 of the Earth-Sun system. IDEX is an impact ionization Time-of-Flight (TOF) mass spectrometer that measures the elemental and/or molecular and selected isotopic composition of impacting dust particles. Due to its high sensitivity and l…