The HISPEC/DESPEC experiments will explore the problems related to nuclear structure, reaction and astrophysics far from the valley of stability using γ-ray spectroscopy techniques. The experiments will be carried out after successful production, separation, and selection of these exotic nuclei at Super-FRS of FAIR. Based on the physics requirement various tracking and identification detectors will be required at the focal planes of Low Energy Branch (LEB) relevant for H/D experiments. Simulations have been carried out for specification of the H/D tracking detectors as well as arrays planned for γ-ray spectroscopy. The physics cases, related detector development and some simulation results related to H/D experiment will be discussed.