We report on a detector concept, TOPSiDE, being developed for the EIC Electron-Ion Collider.
TOPSiDE aims a the detection and identification of all particles created in electron-proton/ion
collisions at the EIC while providing the best possible momentum/energy resolution. The measurement
of hadronic jets exploits the advantages offered by Particle Flow Algorithms (PFAs),
which in turn require imaging calorimetry with very fine granularity of the readout. Particle identification
(pion-kaon-proton separation) is achieved through time-of-flight measurements in the
tracker and the electromagnetic calorimeter, necessitating the application of ultra-fast silicon sensors.
In the forward (hadron) direction particles are identified with a C˘ erenkov detector covering
forward angles up to 10 degrees and a dipole or toroidal magnet for precise momentum measurements.
The talk presents the detector concept, the status of its simulation software, first studies
performed with a completed simulation tool chain, and the status of the detector R&D related to
the novel and challenging aspects of this concept detector.