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Scientists harness smartphones as cosmic ray detectors
Oct 14, 2014 03:43 am | IDG News
Service
University of California researchers
aim to build world's largest detector
by Tim Hornyak
by Tim Hornyak
Your phone can
receive messages from around the world. But how about emanations from beyond
our solar system?
Scientists from
the University of California (UC) have launched an effort to use smartphones to
detect signs of cosmic rays, a form of high-energy radiation that sends
subatomic particles zipping through space.
The CRAYFIS
(Cosmic Rays Found in Smartphones) project is aimed at using the cameras in
smartphones and tablets to detect the lower-energy particles that are produced
when cosmic rays strike the Earth's atmosphere. The goal is to further
understanding of what is producing cosmic rays and help figure out where they
come from.
The researchers
want to build a detector as large as possible so it will have a better chance
of catching the rare particles. To do that, they need commodity hardware.
The
silicon-based CMOS sensors in mobile device cameras work along the same
principles as the sensors used in massive particle accelerators. The sensors
can also detect higher-energy photons, the researchers note in a
scientific paper posted on the physics website arXiv.
"We are
attempting to build a detector that spans the entire world," UC Davis
physicist Michael Mulhearn wrote in an email. "It turns out that the
efficiency of each cell phone for detecting cosmic rays is right at a point
where, with enough people, we'll be able to make world-class
measurements."
Along with
collaborators, Mulhearn and UC Irvine physicist Daniel Whiteson have developed
an app for Android and iOS that activates when a mobile device is plugged in
and not being used. It can report when a particle of interest hits its sensor
and also relay related GPS information. The data are collated on a map on the
CRAYFIS website.
While the
researchers have shown that the technique works, they need numbers to make it
effective.
"Most
importantly, we have to make sure plenty of people around the world get
involved and run our app," Mulhearn wrote. "We need to continue
to fine-tune our algorithms to be as efficient as possible. A major
technical challenge for us will be understanding (and correcting for)
variations in detection efficiency that vary from phone to phone."
The research
could have implications for electronics, especially supercomputers with many
chips, because cosmic rays have been known to interfere with the charged particles
inside chips. But the scientists are focused on the big questions of cosmology
when it comes to cosmic rays.
"The case
for studying cosmic rays is the same as that for studying other basic questions
about the way the world works," Whiteson wrote in an email. "We are
exploring the universe around us, hoping to gain insight into its workings
rather than hoping to gain any immediate practical application."
CRAYFIS is a mobile follow-up to space-related
distributed-computing projects using home computers. They include UC Berkeley's
SETI@home, which was released in 1999 to
look for signs of extraterrestrial life, and Einstein@home, which has found
previously undetected radiowaves.
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In addition to this blog, I have authored the premiere book on Netiquette, " Netiquette IQ - A Comprehensive Guide to Improve, Enhance and Add Power to Your Email". You can view my profile, reviews of the book and content excerpts at:
www.amazon.com/author/paulbabicki
If you would like to listen to experts in all aspects of Netiquette and communication, try my radio show on BlogtalkRadio and an online newsletter via paper.li.I have established Netiquette discussion groups with Linkedin and Yahoo. I am also a member of the International Business Etiquette and Protocol Group and Minding Manners among others. I regularly consult for the Gerson Lehrman Group, a worldwide network of subject matter experts and I have been contributing to the blogs Everything Email and emailmonday . My work has appeared in numerous publications and I have presented to groups such as The Breakfast Club of NJ Rider University and PSG of Mercer County, NJ.
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