Subscribe free to our newsletters via your
. 24/7 Space News .




TIME AND SPACE
X-ray camera makes A-grade particle detector
by Staff Writers
Washington DC (SPX) Oct 14, 2011


File image.

In the particle identification business, two pieces of information are vital: energy and spatial location. By measuring its energy you can work out the mass of your mystery particle. From its spatial location on the surface of a detector, you can work out where the particle came from - and therefore how big the event was that produced the particle in the first place.

For the range of energies close to one million electron volts (1 MeV) - a popular energy range to probe, with uses in a variety of fields from cancer treatment research to astrochemistry - there are currently two leading methods of detecting particles.

But both are limited in the types of molecules they can detect, and both sacrifice one type of information - spatial location or energy measurements - for the other.

Now a group of nuclear physicists and molecular scientists from the Universite Paris Sud and Hamamatsu Photonics have demonstrated a new type of detector that can do both of these jobs at the same time.

Their device uses the CCD image sensor chip in a particular off-the-shelf X-ray camera. In the study, described in a paper accepted to the AIP's Review of Scientific Instruments, the experimenters accelerated charged atoms (or ions) of carbon at various energies above 1 MeV, then "caught" those atoms with the camera. A single ion impact with the camera produced a bright spot on the image sensor.

They also accelerated molecules containing carbon and hydrogen. Unfortunately, these bigger particles overwhelmed the CCD chip, wiping out the details.

To avoid saturating the sensor, the researchers came up with the solution of putting a piece of thin carbon foil in front of it. The foil breaks up the projectile molecules that collide with it and sends them, like shrapnel, to the sensor to be counted.

The foil also allowed them to separate different types of molecules from one another when the molecules' signatures would otherwise have overlapped.

The researchers say they hope their new detector will open the door to a new class of tools in the study of complex molecules using high-energy accelerators.

Article: "Detection of atomic and molecular MeV projectiles using an X-ray CCD camera" is accepted for publication in the Review of Scientific Instruments. Authors: M. Chabot (1), G. Martinet (1), K. Beroff (2), T. Pino (2), S. Bouneau (1), B. Genolini (1), X. Grave (1), K. Nguyen (1), C. le Gailliard (1), P. Rosier (1), G. Feraud (2), H. Friha (2), and B. Villier (3).

.


Related Links
American Institute of Physics
Understanding Time and Space






Comment on this article via your Facebook, Yahoo, AOL, Hotmail login.

Share this article via these popular social media networks
del.icio.usdel.icio.us DiggDigg RedditReddit GoogleGoogle




Memory Foam Mattress Review
Newsletters :: SpaceDaily :: SpaceWar :: TerraDaily :: Energy Daily
XML Feeds :: Space News :: Earth News :: War News :: Solar Energy News





TIME AND SPACE
Measuring Billions of Elusive Neutrinos Flowing Through the Earth
Amherst MA (SPX) Oct 10, 2011
Using one of the most sensitive neutrino detectors on the planet, an international team including physicists Laura Cadonati and Andrea Pocar at the University of Massachusetts Amherst are now measuring the flow of solar neutrinos reaching earth more precisely than ever before. The detector probes matter at the most fundamental level and provides a powerful tool for directly observing the sun's c ... read more


TIME AND SPACE
Subtly Shaded Map of Moon Reveals Titanium Treasure Troves

NASA's Moon Twins Going Their Own Way

Titanium treasure found on Moon

NASA Invites Students to Name Moon-Bound Spacecraft

TIME AND SPACE
Russia invited to join Mars missions

Mars Express observes clusters of recent craters in Ares Vallis

Wet and Mild: Caltech Researchers Take the Temperature of Mars' Past

New Mystery On Mars' Forgotten Plains

TIME AND SPACE
In Response to New York Bait-And-Switch, Brown Calls on NASA to Reevaluate Shuttle Site Placement

Iran failed with space monkey launch: report

UN highlights everyday benefits from space science and technology

Shot US lawmaker honors astronaut husband

TIME AND SPACE
China's first space lab module in good condition

Takeoff For Tiangong

Snafu as China space launch set to US patriotic song

Civilians given chance to reach for the stars

TIME AND SPACE
It's All in the Mix With Fluid Physics in Space

DLR ROKVISS robotic arm returns from space

Commercial space deliveries 'within months': NASA

Private US capsule not to dock with ISS

TIME AND SPACE
Virgin Galactic to give NASA a ride

Indian-French satellite put into orbit

Chinese rocket sends French telecom satellite into space

On-time preparations continue for Soyuz' milestone mission from French Guiana

TIME AND SPACE
UChicago launches search for distant worlds

Astronomers Find Elusive Planets in Decade-Old Hubble Data

University of Texas-led Team Discovers Unusual Multi-Planet System with NASA's Kepler Spacecraft

Heavy Metal Stars Produce Earth-Like Planets

TIME AND SPACE
e2v celebrates the successful delivery of imaging sensors for Gaia

Physicists develop lasers inspired by nature

Old radium bottles blamed for Tokyo radiation

Discovery could make fuel and plastics production more energy efficient and cost effective




The content herein, unless otherwise known to be public domain, are Copyright 1995-2014 - Space Media Network. AFP, UPI and IANS news wire stories are copyright Agence France-Presse, United Press International and Indo-Asia News Service. ESA Portal Reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. Advertising does not imply endorsement,agreement or approval of any opinions, statements or information provided by Space Media Network on any Web page published or hosted by Space Media Network. Privacy Statement