Design Blueprint: A High-Harmonic Generation Source Sized by the Cutoff Law and Phase-Matching Pressure

Design blueprint derived from the source paper (DOI 10.5281/zenodo.24155237): This paper presents a computed design for a gas-cell high-harmonic generation source driven at 800 nm, producing extreme-ultraviolet pulses with a spectral cutoff near 46 eV. The sizing follows from applying the relevant intensity, thermal, nonlinear and geometric bounds at a single stated operating point, with every number produced by a deposited computation. The headline result is a drive intensity of 1.6e+14 W/cm2, a ponderomotive energy of 9.6 eV, a cutoff photon energy of 46 eV reaching harmonic order 30 of the drive, and an order-of-magnitude flux near the cutoff of 6.8e+08 photons per s Status: DESIGN BLUEPRINT — SIMULATED, NOT MEASURED — NOT BUILT. All numbers are simulated values from the source paper's computation, deposited with this blueprint as compute.py and results.json. AI-use disclosure: Dave, an AI research system, assisted with the computation and drafting under the author's direction; author of record William Alexander Aldred.