Why the LHC Is Colder Than Outer Space, On Purpose
Why is the LHC colder than outer space? At 1.9 kelvin helium turns superfluid, and that quantum threshold keeps the LHC's magnets from quenching.
Reference for the physics of instrumentsNewest data
The open reference for radiation, particles and the instruments that measure them.
Free calculators. Every result sourced and citable.
Simulated event displayB = 3.8 T · √s = 13.6 TeV
Instruments
Energy-loss calculator
Mean energy loss, most probable loss and straggling.
100 MeV p in water: 7.7 g/cm²Radioactive decay calculator
Calculate decay and daughter activity.
Mo-99 → Tc-99m peak: 22.8 hMaterials library
Density, excitation energy and radiation properties.
Si radiation length: 9.37 cmAccelerator power and synchrotron loss calculator
Dipole radiation for a beam in an isomagnetic ring.
LEP2 loss/turn: 3.41 GeVGamma dose rate calculator
Gamma dose rate in air from source activity, isotope and distance.
Co-60, 1 GBq at 1 m: 0.31 mGy/hRadiation units converter
Convert activity, dose, exposure and energy units.
1 Ci = 37 GBqPhoton attenuation calculator
Gamma and X-ray transmission through materials.
HVL Pb, 662 keV: 5.54 mmDetector signal calculator
Electron-hole pairs and fully collected charge in silicon and germanium.
MPV, 300 µm Si: 22 568 e⁻h⁺Data desk
PLATON Particle Detector Swaps Millions of Fibers for AI
PLATON particle detector ditches millions of scintillator fibers for one block, a plenoptic camera, and a Transformer AI headed for PET scanners first.
SiPM vs PMT: Why Silicon Hasn’t Won Everywhere Yet
SiPM vs PMT: silicon wins on efficiency, voltage and magnetic immunity, but tubes still win on collecting area per euro. The numbers and a verdict.
Ask your AI assistant
14 connector tools, 8 of them for physics. Every answer includes its source.
https://scienceshot.com/mcp> ask scienceshot: How much lead halves 662 keV gammas?
5.54 mm (HVL, NIST XCOM) · cite: scienceshot.com/photon-attenuation-calculator
- How much does 10 mm of lead attenuate 662 keV photons?
- What signal does a 3 GeV/c muon produce in 300 micrometres of silicon?
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What did Albert Einstein invent? His patents, checked against the records
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Cosmology & Astrophysics
Moon Illusion: The Horizon Moon Is Farther and Smaller
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Franz Reichelt’s Eiffel Tower Jump: The Parachute Was Big Enough
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Kola Superdeep Borehole: The Rock Beat the Drill
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Thomas Midgley’s Leaded Gasoline Choice Wasn’t About Chemistry
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Quantum Physics
Quantum Error Correction Threshold Theorem: Why Scale Helps
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Quantum Physics
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Magnon Qubit Quantum Computing: Wrong Job Title?
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Cosmology & Astrophysics
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Webb Telescope Reveals Interstellar Comet 3I/ATLAS Predates Our Sun
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Quantum Physics
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"Unlock the amazing secrets of quantum physics using simple analogies that explain our complex universe."
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