Design Blueprint: A Cryogenic Yb:YLF Amplifier Sized by Saturation Fluence and Stored Energy at 77 K

Design blueprint derived from the source paper (DOI 10.5281/zenodo.24155166): This paper presents a computed design for a cryogenically cooled Yb:YLF amplifier operating near 77 K as a high-energy, high-repetition-rate stage at 1020 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 saturation fluence of 1.77 J/cm2 at 77 K, a stored energy of 6.2 J in the stated crystal volume, an extracted pulse energy of 3.4 J at 55% extraction, and a repetition-rate ceiling near 34 Hz set by a 40 W cryocooler lift agains 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.