Midplane H+ Proton Lanes: Geometry, Double Tilt, and Drift

This record presents a compact design note and run sheet for a new proton-transport architecture: a shallow valley slit with mildly positive faces and an ultrathin protonic film that focuses hydrated H+ toward the midplane and drives it forward with a small axial field. A tiny transverse “double tilt” biases local O…H–O hand-offs, suppressing side and back hopping without altering bulk flow. The document formalizes a side-slope window (via an uphill-hop suppression criterion) that sets practical bounds on crown angle and transverse bias, and it explains why H+ effectively cannot hop “uphill” once the monotone-drift condition is met. What is included: A pre-Abstract “What Is New Here” summary Operating windows for gap, fields, ionic strength, and surface potential Length scaling versus a six-water wire reference A “Knobs at a Glance” table with defaults and sweep ranges A numeric example that converts side-barriers into a target transverse bias Injection/collection options (Pt/Pd reservoirs, H2 evolution, Nafion window) Falsifiable tests (odd/even demod, salt scans for Debye matching, wall-charge flips, H↔D swap, structural Disable-L) Failure modes and mitigations This work extends and operationalizes the double-tilt choreography introduced in “Six-Water Proton Wire: From Symmetry to Asymmetry via Double Tilt, and Falsifiable Tests,” providing a device-ready pathway from nanometer-scale relays to micron-scale lanes with clean, testable signatures.