FIP/P1-45: Baking of Aditya Ugrade Tokamak Aditya-U tokamak successfully operated prior to phase-2 diagnostic system installation. All necessary in-vessel & Ex-vessel diagnostic systems were install, its integrity/leak tightness confirmed. Specially designed heaters and heat insulation jackets installed on vessel, complete system commissioned with in-house developed control system. Bake-out temperature of vessel is increased gradually from 35 C to 135 C from few min to 48 Hrs & achieved stable bake-out operation. Most of the Mass 18 removed in first 12 hours of Baking, while preforming GDC carried out at 135 C after 12 hours stable temperature, Mass No. 32 was reduced in 3 order. In this paper, the technical challenges faced during installation , commissioning of baking system in Aditya-U tokamak presented in brief.