UPSC Mains 2025 GS3 Q5 — Science and Technology, Fusion

• Evolutionary milestones of India's indigenous fusion research (e.g., ADITYA and SST-1) as a precursor to ITER participation.
• Categorization of India's 'in-kind' hardware contributions and engineering feats specifically provided to the ITER site in France.
• Technological and economic shifts from a carbon-intensive to a 'limitless' baseload energy paradigm.
• Strategic implications of India’s role as a founding member in terms of intellectual property and future energy security.

• Writing too much about the physics of nuclear fusion (how it works) instead of focusing on India's specific contributions.
• Confusing fission-based energy milestones (like the Three-Stage Nuclear Programme) with fusion-based research.
• Vague descriptions of contributions; failing to mention specific components like the Cryostat, cooling systems, or the Institute for Plasma Research (IPR).
• Neglecting the 'implications' part of the question or providing only generic environmental benefits without mentioning baseload energy stability.

Spend approximately 30 words on the evolution of India's domestic fusion program. Devote 60 words to specific ITER hardware contributions (like the Cryostat). Allocate the final 60 words to the future implications of successful fusion for global energy security and decarbonization.