S79 — Robustness & upgrade envelope
S79: Robustness & upgrade envelope. Design-space study (forward-looking), part of the Kronos MetroVolt 81-analysis validation record (DOI 10.5281/zenodo.21746479).
- Register ID
- S79
- Campaign
- Design-space studies (forward-looking)
- Status
- Design-space study (forward-looking)
- Deposit
- DOI 10.5281/zenodo.21746479
S79 closes one of the coupled physics-to-engineering constraints that make the MetroVolt design point self-consistent.
What the register records
Cuts both ways: wall-stabilised β_N=5.0 buys +24% Pfus at unchanged H98; n_e/T_i −10% degrade gracefully; but I_p −10% is NOT recoverable by density trim — plasma current is the least forgiving parameter.
This is a register summary of a deposited analysis; its title and notes quote the deposit as-run, so parameters here may reflect the pre-Mode-D basis where they differ — all operating claims cite the frozen Mode-D point (ratified 24 July 2026). Full input decks, scripts, and output data for every analysis S01–S81 are released openly under CC BY 4.0 at DOI 10.5281/zenodo.21746479.