Energy Aperture

Value chain · CLM-0004

In plain terms

The author of the 2019 CASSIOPeiA paper states the beam's strongest point is about 230 watts per square metre, and says that figure was chosen because it makes the economics work.

The claim as recorded

Cash's 2019 CASSIOPeiA paper states a safe peak beam intensity of under 1 kW/m2 with 230 W/m2 typical, and describes the 230 W/m2 figure explicitly as an optimum peak beam intensity chosen on economic grounds.

Scope and limits

Peer-reviewed; the design's antenna patent (SRC-088) names the paper's author as sole inventor, so stance is POS. The paper asserts the level is "safe" without citing an exposure standard.

What it assumes

No assumptions are recorded against this claim.

Where it comes from

SRC-026 CASSIOPeiA - A new paradigm for space solar power, 2019
Quoted verbatim, p7: "Given the necessary size of the rectenna, a safe peak beam intensity of < 1 kW/m2 (230 W/m2 typical) allows multi-gigawatt delivery - hence multi-gigawatt systems are dictated by economics." And p8: "An optimum peak beam intensity of 230 W/m2 is met with CASSIOPeiA scaled as shown in Table 3."
Related records
Answers question
QST-001 not published in this release

Cite this

energyaperture.com/c/clm-0004

CLM-0004, Energy Aperture, as of 2019.

Connected records

Other published records linked to this one. A list, not a judgement.

Also from SRC-026
CLM-0006None of the five main studies mentions the international radio-frequency exposure limits, or any safety standard, or a restricted area...
CLM-0013The paper that modern UK studies rely on for the beam figure calls anything below 1 kilowatt per square metre safe, with 230 watts per...
CLM-0336Different design studies over four decades have each simply assumed a different working lifetime for a solar power satellite, from about 15...
CLM-0339A 2019 paper said solar power satellites are often assumed to need visits in orbit for repairs and refuelling, but that no system yet...
CLM-0441A normal geostationary satellite needs a small, regular fuel-based nudge every year to stay in place. One 2019 design proposes cutting most...
CLM-0504None of the main CASSIOPeiA-related documents in the register mentions any named safety or exposure standard, or describes any restricted...
CLM-0660The 2019 CASSIOPeiA paper does not discuss electric propulsion for getting the satellite to its orbit. It only prices delivery using...
CLM-1175The design would control its orientation without fuel. Small mirror panels near its front carry a coating whose reflection can be changed...
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