Design Blueprint: A Petawatt Ti:Sapphire Chirped-Pulse Amplifier Chain Sized by Damage Fluence and B-Integral

Design blueprint derived from the source paper (DOI 10.5281/zenodo.24155353): This paper presents a computed design for a four-stage Ti:sapphire chirped-pulse amplifier chain delivering a compressed pulse at 800 nm. 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 compressed energy of 30 J in 25 fs, giving 1.20 PW of peak power, a final aperture of 9.2 cm at an operating fluence of 0.45 J/cm2, a whole-chain B-integral of 0.13 rad, and an f/3 focused intensity of 4.46e+21 W/cm2 corresponding to a normalised ve 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.