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Photomultiplier tube

Photomultiplier tube


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Photomultiplier tube

Photomultiplier tube (PMT) held by technician Giuseppe Dipietro of the Gran Sasso Laboratory. 2200 PMTs are incorporated into the Borexino neutrino detector (not seen). Neutrinos are elementary particles produced by nuclear reactions in stars and in supernova explosions. The PMT detects the flash of light when a neutrino hits the liquid core of the detector. The Borexino detector measures neutrino flux from the Sun. The Gran Sasso Laboratory is in Abruzzo, Italy. The neutrino detector is located 1400 metres underground and is accessed from a 10 kilometre long road tunnel. The rock overlay shields the laboratories from cosmic rays

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Media ID 6447585

© VOLKER STEGER/SCIENCE PHOTO LIBRARY

Abruzzo National Park Astrophysics Collector Cosmology Dark Matter Elementary Particles Flux Gran Sasso Laboratories Italian Italy Measurement Neutrino Detector Observatory Protected Researcher Sensor Shielded Star Stars Supernova Technician Tubes Under Ground Giuseppe Guiseppe


EDITORS COMMENTS
This print showcases technician Giuseppe Dipietro holding a Photomultiplier tube (PMT) at the Gran Sasso Laboratory in Abruzzo, Italy. The PMT is an integral part of the Borexino neutrino detector, which consists of a staggering 2200 PMTs that are not visible in this image. Neutrinos, elementary particles generated by nuclear reactions within stars and supernova explosions, can be detected when they collide with the liquid core of the Borexino detector, emitting a flash of light that is picked up by these photomultiplier tubes. Situated 1400 meters underground and accessed through a remarkable 10-kilometer-long road tunnel, this state-of-the-art neutrino detector lies within the protective shield provided by layers of rock overlaying it. This shielding effectively guards against cosmic rays interference while allowing for accurate measurements to be conducted. The primary focus of this particular neutrino detector is to measure the flux of neutrinos originating from our very own Sun. As such, it plays a crucial role in advancing our understanding of astrophysics and cosmology. The stainless steel sphere housing these photomultiplier tubes serves as both a collector and sensor for detecting these elusive particles. This awe-inspiring photograph offers us a glimpse into the world beneath our feet where groundbreaking research takes place to unravel mysteries surrounding dark matter, stars, supernovas, and other celestial phenomena. It symbolizes humanity's relentless pursuit to comprehend the vastness of our universe through scientific exploration at esteemed institutions like Gran Sasso Laboratories.

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