Cosmic-Ray Inquiry Program Detectors Around the World

OTHER DETECTORS DETECTORS

Other detectors ─ the many detectors around the world that catch cosmic rays and radiation
+ accel-kitchen's own

First, Accel Kitchen's own detector.

OHASHI (cosmic ray detector v2): an iridescent 3D-printed box with a green lid, and a display window plus round holes for the button and LED on the side Accel Kitchen OHASHI (Cosmic Ray Detector v2)Accel Kitchen · assembled A detector that counts cosmic rays one by one. A SiPM reads the scintillator's light, and the unit records pulse height, time and pressure, sending them to USB, Bluetooth and microSD. Choose a plastic scintillator for cosmic rays or CsI for gamma-ray spectra. Connect external detectors to measure in coincidence. View in the shop
OHASHI v2

This single detector is the starting point for all the "other detectors" featured on this page. In the Accel Kitchen cosmic-ray inquiry program, inquiry begins by measuring cosmic rays and radiation at home with this detector.

It's also available in the shop, ready to use for middle- and high-school inquiry, classwork, and independent research projects.

OHASHI means "chopsticks"; the earlier v1 is OWAN, "bowl". Its inner workings are introduced with a 3D model and simulations (the OHASHI page).

+ a world of detectors

Detectors aren't just one kind.

At Accel Kitchen, we loan participants a scintillator detector they assemble themselves. But that's not the only way to catch cosmic rays and radiation. Around the world there are many detectors suited to different purposes.
Here we introduce some of the best-known detectors that middle- and high-school students can use or learn from, grouped into three broad families. Let it be a doorway to discovering that "there are other ways to measure, too."

Catch muons & charged particles

A type that uses scintillators which flash when a muon — the main player in cosmic rays — passes through. Simultaneous measurement across several layers (coincidence) confirms a particle "really did pass through."

Measure gamma rays & radiation

A type that measures the natural background radiation and gamma rays around us. From differences in energy, you can even work out which atomic nuclei they came from.

"See" particle tracks

A type that uses many tiny pixels to render the path a particle traveled as an image. It lets you experience radiation you can actually "see."

Family 01 · Muons Catch muons & charged particles
QuarkNet cosmic-ray muon detector (6000 series): a full hardware set of scintillator counters, photomultiplier tubes, and a DAQ board Muons QuarkNet CRMDUSA · Fermilab / QuarkNet · scintillator + PMT + DAQ Measures muons in coincidence using plastic scintillators, photomultiplier tubes (PMTs), and a dedicated DAQ board. A classic educational system: you can measure rates and lifetimes and share data on the "Cosmic Ray e-Lab" that connects schools around the world. User manual (PDF) The CosmicPi cosmic-ray detector unit Muons CosmicPiFrom CERN · scintillator + SiPM + Raspberry Pi An open-source cosmic-ray detector that connects plastic scintillators and SiPMs (semiconductor photodetectors) to a Raspberry Pi. With built-in GPS, it aims to build a muon-observation network linking detectors scattered around the world. Official site The CAEN Cosmic Hunter (SP5620CH) detection tiles and coincidence board Muons CAEN Cosmic HunterItaly · CAEN · scintillator + SiPM · education kit An educational cosmic-ray kit from the Italian instrument maker CAEN. Built from scintillator tiles, SiPMs, and an ESP32 coincidence board, it shows the count results on an E Ink display. With up to three tiles, you can measure muon rates and air showers. Product page Concept diagram Muons Japanese-style cosmic-ray muon detectorICRC2023 (PoS) · developed for education / outreach A research report on a cosmic-ray muon detector developed in Japan for education and outreach, presented at the International Cosmic Ray Conference (ICRC2023). It's packed with ideas for letting students experience cosmic rays at schools and science events. Conference paper (PoS)
Family 02 · Gamma & Radiation Measure gamma rays & radiation
The Cogamo gamma-ray monitor unit Gamma rays CogamoThundercloud Project · CsI(Tl) scintillator + GPS A palm-sized Compact Gamma-ray Monitor. It measures environmental gamma rays with a CsI(Tl) scintillator while recording the time and location at the same time via GPS. It's used in the citizen-science "Thundercloud Project" to observe gamma rays from thunderclouds. Setup guide The RadiaCode pocket-sized radiation detector / spectrometer Radiation RadiaCode (110 / Zero)CsI(Tl) scintillation spectrometer and dosimeter A small gamma-ray spectrometer that fits in your pocket. Using a CsI(Tl) scintillator, it measures radiation with far greater sensitivity than a Geiger counter. From the energy spectrum, you can investigate which nuclide the radiation came from. Official site A radiation detector for measuring radon Radiation education Radiation education with a radon detectorDr. Miake · Low-Background WS 2020 An approach to radiation education built around radon (natural radiation) found in everyday surroundings. These slides were presented as a practical example of teaching radiation gently, starting from simply "giving it a measure." Presentation slides (PDF)
Family 03 · Tracks "See" particle tracks
The Timepix detector used in CERN's Timepix@school program Track visualization TimepixDeveloped from CERN's Medipix2 · silicon pixel detector A silicon pixel detector born at CERN. Connect it to a computer by USB and the trails (tracks) left by cosmic rays and natural radiation appear on screen in real time — you can even tell the particle types apart. The CERN & Society Foundation's "Timepix@school" brings it to schools. Timepix@school
why it's special

While the previous two families count "how many passed through," a pixel detector like Timepix shows you the very path the radiation traveled, as an image.

A muon shooting straight through, an electron winding and curving, an alpha particle appearing as a dot — each particle paints a different "picture," and that's the appeal: you can intuitively feel radiation that should be invisible.

Credits: The names, photographs, and diagrams of each detector belong to their respective makers, organizations, and research groups. This page introduces an overview as a doorway into cosmic-ray and radiation inquiry. For accurate specifications, how to obtain each device, and the latest information, please see the official pages and materials linked from each card.

Start with your own detector.

Accel Kitchen delivers a cosmic-ray detector you build yourself, right to your home.
Now that you know the many kinds of detectors out there, why not begin by "measuring with your own hands"?

See the cosmic-ray inquiry program Apply 5min