A promising candidate of long persistent Ca2 MgSi2 O7 :Dy3+ phosphor sample was well sintered via traditional high temperature solid-state synthesis technique and characterized in terms of crystal structure, particle size, phase composition and TL trapping parameters have briefly discussed using X-Ray Diffraction (XRD), Field Emission Scanning Electron microscopy (FESEM), Energy Dispersive X-ray (EDX) Spectroscopy and TL-Dosimetry Reader techniques. The XRD results revealed that it has formed in a single phase and tetragonal crystallography (Akermanite crystal structure) with a space group P4?21m. All trapping parameters such as activation energy (E) (i.e. trap depth), order of kinetics (b) and frequency factor (s), and all these trapping parameters were calculated using Chen’s glow curve method. In this present paper, structural & thermal properties of synthesized phosphor are discussed in detail. We have clearly observed that the trapped electrons in the crystal lattice site and the self-trapped hole that both are responsible for crystal growth process. Deeper traps are highly helpful for increasing the long persistent duration and afterglow process.