{
    "title": "Atmospheric Electrical Power ( II )",
    "inventor_name": "Hermann Plauson",
    "publication_year": 1920,
    "device_name": "Plauson's atmospheric electricity converter",
    "goal": "Convert ambient atmospheric static electricity into usable continuous electrical power.",
    "problem_addressed": "Lack of universally available, low-cost energy sources; need for off-grid power in remote locations.",
    "concept_summary": "Plauson's system uses radium-coated metal needles mounted on large magnesium-aluminium alloy aerostats (balloons). The needles ionise the surrounding air, allowing the static electric field of the atmosphere to charge the balloon. The collected charge is transferred through coils, capacitors and spark gaps to produce rectified continuous current pulses that can power devices such as LEDs.",
    "detailed_description": null,
    "principles": [
        "Electrostatic charge collection",
        "Ionisation of air by radioactive (radium) needles",
        "High-voltage rectification via spark gaps",
        "Resonant conversion using coil-capacitor circuits",
        "Use of conductive balloons as large-area collectors"
    ],
    "scientific_domains": [
        "Physics",
        "Atmospheric electricity",
        "Electrical engineering"
    ],
    "mechanisms_of_action": [
        "Radium-induced ionisation creates free charge carriers in the air.",
        "Needle-mounted collectors attract atmospheric ions, charging the balloon surface.",
        "Stored electrostatic energy is discharged through spark gaps into coil-capacitor networks.",
        "Resonant circuits convert the pulsed discharge into continuous AC/DC output."
    ],
    "materials": [
        "Radium (radioactive compound)",
        "Magnesium-aluminium alloy (balloon skin)",
        "Metal needles (e.g., copper or steel)",
        "Zinc amalgam patches",
        "Copper wire (coils)",
        "Capacitor plates (glass/ceramic)",
        "Spark-gap electrodes (metal)"
    ],
    "energy_sources": [
        "Ambient atmospheric static electricity"
    ],
    "inputs": [
        "Atmospheric electric field",
        "Ionising radiation from radium-coated needles",
        "Mechanical lift (aerostat buoyancy)"
    ],
    "outputs": [
        "Continuous electrical power (DC/AC)",
        "LED lighting"
    ],
    "claimed_performance": "Power output between 0.72 kW and 3.4 kW from one or two aerostats positioned 300 m above ground level.",
    "experimental_evidence": "Plauson reported obtaining 0.72 kW-3.4 kW from aerostats; MIR research states that a simple 5 m zinc antenna can light several white LEDs.",
    "replication_status": null,
    "keywords": [
        "atmospheric electricity",
        "electrostatic generator",
        "aerostat",
        "radium",
        "static electricity conversion",
        "renewable energy"
    ],
    "related_technologies": [
        "Tesla coil",
        "Electrostatic precipitator",
        "High-altitude wind turbines",
        "Atmospheric ion harvesters"
    ],
    "controversy_level": "medium",
    "confidence_score": 0.85,
    "practicability_score": 0.4,
    "fringe_score": 0.6,
    "evidence_strength": 0.5,
    "risk_score": 0.3,
    "trl_estimate": 3,
    "source_urls": [
        "https://en.wikipedia.org/wiki/Hermann_Plauson",
        "https://www.google.com/patents/US1485706",
        "https://www.google.com/patents/US1540998",
        "http://www.nuenergy.org/alt/GernsbackOnPlausonFebruary1922.htm",
        "http://www.nuenergy.org/alt/PlausonMarch1922.htm",
        "http://www.meridian-int-res.com/Energy/Atmospheric.htm",
        "https://books.google.com/books/about/Gewinnung_und_Verwertung_der_atmosph%C3%A4ri.html?id=t35yQwAACAAJ"
    ],
    "organizations": [
        "Fischer-Tropsch Otto Traun Research Laboratories",
        "MIR (MIR's Research Programme)"
    ],
    "applications": [
        "Off-grid LED lighting for remote communities",
        "Low-power domestic electricity",
        "Neon lighting in areas without grid access"
    ],
    "limitations": [
        "Requires large high-altitude aerostats (~=300 m) for significant power",
        "Use of radium introduces radioactive safety concerns",
        "Low power density compared with solar or wind",
        "Scalability and long-term durability not demonstrated"
    ],
    "open_questions": [
        "How can the system be scaled to megawatt levels?",
        "What safe alternatives exist to radium for ionisation?",
        "What is the overall conversion efficiency?",
        "How does weather (humidity, storms) affect performance?"
    ],
    "red_flags": [
        "Use of radioactive radium needles",
        "Historical claims lack modern peer-reviewed validation",
        "Potential over-optimistic power estimates"
    ],
    "evidence_quotes": [
        "Plauson obtained a power output of between 0.72 kW and 3.4 kW from one and two aerostats 300 m above ground level.",
        "From a low level (5 m high) simple zinc antenna we are able to obtain sufficient charge to light a number of white power LEDs.",
        "His patent no. 1540998 describe methods to convert alternating radiant static electricity into rectified continuous current pulses.",
        "He carried out experiments in Finland with aerostats manufactured from magnesium-aluminium alloy, covered with electrolytically deposited needles doped with a radium compound."
    ],
    "category": "Electromagnetism & Magnetism"
}