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Experimental Observation Instrument Development (Nakano Lab)
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A lab studying nuclear emulsion plates, photographic film that captures elementary particles.
AboutAbout the lab
Exploring elementary particles and the universe with nuclear emulsion.
The lab mainly uses nuclear emulsion technology, a photographic film that can record elementary particles, to study elementary particles, including neutrinos, which are tied to how the universe came to be.
It also works on searching for unknown particles that are dark matter candidates and on seeing through huge structures using cosmic rays (cosmic-ray muon radiography).
The lab also independently develops the photographic emulsion that is the raw material of nuclear emulsion plates, and track readout systems that read the tracks inside the plates.
The lab's website goes by the name "F Lab (Fundamental Particle Lab)", and this introduction is based on text published in 2012.
Key terms
- Nuclear emulsion plate
- A photographic film that can record elementary particles. When a particle passes through, it leaves a trace (track) inside the plate
- Track
- The trace an elementary particle leaves inside a nuclear emulsion plate
- Track readout system
- A microscope that automatically reads, at high speed, the tracks inside nuclear emulsion plates
- Cosmic-ray muon radiography
- Research that uses cosmic rays to see through the inside of huge structures
NewsLab news
A student won the Student Excellent Presentation Award at the Symposium on Radiation Chemistry
A student won the Poster Excellent Presentation Award at a research meeting of the Transformative Research Areas (A)
A student won the Student Oral Presentation Award at the annual meeting of the Society of Photographic Science and Technology of Japan
ResearchResearch themes
The lab mainly uses nuclear emulsion plates, a photographic film technology that can record elementary particles, to study elementary particles tied to how the universe came to be. It also independently develops the raw material for the plates and the systems that read the tracks inside them.
*Illustrative imageExploring elementary particles and the universe with nuclear emulsion
Using mainly nuclear emulsion technology, the lab studies elementary particles, including neutrinos, and searches for unknown particles that are dark matter candidates. The GRAINE cosmic gamma-ray observation project and seeing through huge structures with cosmic rays are applications of this technology, and the lab also works on neutron measurement.
*Illustrative imageDevelopment of nuclear emulsion and track readout systems
The lab independently develops the photographic emulsion that is the raw material of nuclear emulsion plates (nuclear emulsion), and microscopes (track readout systems) that automatically read at high speed the traces (tracks) that elementary particles leave inside the plates.
MembersFaculty
The members of F Lab consist of staff, doctoral, master's, and undergraduate students, visiting researchers, and a secretary.As of 2026
- Associate ProfessorToshiyuki Nakano
- Project Associate ProfessorOsamu Sato
- Project Assistant ProfessorNaotaka Naganawa
- Project Assistant ProfessorTomokazu Matsuo
- Project Assistant ProfessorHiroki Rokujo
VoicesStudent voices
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Report an errorAbout the images
The top and research theme images are illustrative and were not taken at the lab. They are cropped from Wikimedia Commons images. Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “Nuclear Emulsion Stack” Reculet / CC0 (cropped)
- Exploring elementary particles and the universe with nuclear emulsion: “MiniBooNE” Fred Ullrich / Public domain (cropped)
- Development of nuclear emulsion and track readout systems: “View of scientist looking at a Surveyor III components with a microscope in a Lunar Receiving Laboratory sterile vacuum cabinet (s70-22401)” NASA / Public domain (cropped)
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