Featured Research

from universities, journals, and other organizations

First data released from the Alpha Magnetic Spectrometer

Date:
April 3, 2013
Source:
DOE/US Department of Energy
Summary:
The first published results from the Alpha Magnetic Spectrometer (AMS), a major physics experiment operating on the International Space Station, were announced today. The result is the most precise measurement to date of the ratio of positrons to electrons in cosmic rays. Measurements of this key ratio may eventually provide the world with our first glimpse into dark matter.

The first published results from the Alpha Magnetic Spectrometer (AMS), a major physics experiment operating on the International Space Station, were announced today by the AMS collaboration spokesman, Nobel Laureate Samuel Ting. The result is the most precise measurement to date of the ratio of positrons to electrons in cosmic rays. Measurements of this key ratio may eventually provide the world with our first glimpse into dark matter.

Related Articles


The AMS experiment, developed under the leadership of Professor Ting, with support from the U.S. Department of Energy and fifteen other international partners, is the world's most precise detector of cosmic rays. It was constructed at universities around the world and assembled at the European Organization for Nuclear Research (CERN).

"We are very excited with this first result from AMS," said James Siegrist, DOE Associate Director of Science for High Energy Physics. "We look forward to more important results in the future."

"This result is the first step," said Professor Ting, "the beginning of a series of high precision experimental results from the Alpha Magnetic Spectrometer. This shows that a large international particle physics collaboration can work together to do particle physics in space."

The science goals of AMS include the search for dark matter, antimatter, and new physical phenomena. The detector provides high-precision measurements of cosmic ray particle fluxes, their ratios and gamma rays. From the time of its conception in 1994, U.S. support for the AMS experiment has come from DOE's Office of Science, which provided about $50 million in funding over the life of the program.

This first physics result from AMS is based on 18 months of operation, during which time AMS measured 6,800,000 cosmic ray electrons in the energy range of a half-billion to a trillion electron volts, and over 400,000 positrons (positive electrons), the largest number of energetic antimatter particles directly measured from space. The importance of this measurement is that it could eventually provide a "smoking gun" that certain dark matter particles exist and that dark matter particles and antiparticles are annihilating each other in space.

Although the data do not show a "smoking gun" at this time, this first high-precision (~1% error) measurement of the spectrum has interesting features not seen before that future data may help clarify. With additional data in the coming years, AMS has the potential to shed light on dark matter.

AMS was installed on the Space Station on May 19, 2011 after having been brought into orbit on the last flight of NASA's space shuttle Endeavour under the command of Captain Mark Kelly. Within only hours of its installation on the exterior of the Space Station, AMS became fully operational, and to date has measured over 30 billion cosmic ray events. Working in close cooperation with NASA astronauts and NASA's Johnson Space Center and Marshall Space Flight Center, AMS has maintained a flawless record of performance in the face of a hostile space environment.

Hundreds of scientists, engineers, technicians and students from all over the world have worked together for over 18 years on the AMS collaboration. The collaboration includes scientists from Europe (Finland, France, Germany, Italy, the Netherlands, Portugal, Spain, Switzerland, Romania, Russia, Turkey), Asia (China, Korea, Taiwan), and North America (Mexico and the United States).


Story Source:

The above story is based on materials provided by DOE/US Department of Energy. Note: Materials may be edited for content and length.


Cite This Page:

DOE/US Department of Energy. "First data released from the Alpha Magnetic Spectrometer." ScienceDaily. ScienceDaily, 3 April 2013. <www.sciencedaily.com/releases/2013/04/130403200308.htm>.
DOE/US Department of Energy. (2013, April 3). First data released from the Alpha Magnetic Spectrometer. ScienceDaily. Retrieved March 31, 2015 from www.sciencedaily.com/releases/2013/04/130403200308.htm
DOE/US Department of Energy. "First data released from the Alpha Magnetic Spectrometer." ScienceDaily. www.sciencedaily.com/releases/2013/04/130403200308.htm (accessed March 31, 2015).

Share This


More From ScienceDaily



More Health & Medicine News

Tuesday, March 31, 2015

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Solitair Device Aims to Takes Guesswork out of Sun Safety

Solitair Device Aims to Takes Guesswork out of Sun Safety

Reuters - Innovations Video Online (Mar. 31, 2015) — The Solitair device aims to take the confusion out of how much sunlight we should expose our skin to. Small enough to be worn as a tie or hair clip, it monitors the user&apos;s sun exposure by taking into account their skin pigment, location and schedule. Matthew Stock reports. Video provided by Reuters
Powered by NewsLook.com
Soda, Salt and Sugar: The Next Generation of Taxes

Soda, Salt and Sugar: The Next Generation of Taxes

Washington Post (Mar. 30, 2015) — Denisa Livingston, a health advocate for the Dinι Community Advocacy Alliance, and the Post&apos;s Abby Phillip discuss efforts around the country to make unhealthy food choices hurt your wallet as much as your waistline. Video provided by Washington Post
Powered by NewsLook.com
UnitedHealth Buys Catamaran

UnitedHealth Buys Catamaran

Reuters - Business Video Online (Mar. 30, 2015) — The $12.8 billion merger will combine the U.S.&apos; third and fourth largest pharmacy benefit managers. Analysts say smaller PBMs could also merge. Fred Katayama reports. Video provided by Reuters
Powered by NewsLook.com
S. Leone in New Anti-Ebola Lockdown

S. Leone in New Anti-Ebola Lockdown

AFP (Mar. 28, 2015) — Sierra Leone imposed a three-day nationwide lockdown Friday for the second time in six months in a bid to prevent a resurgence of the deadly Ebola virus. Duration: 01:17 Video provided by AFP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
 
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:  

Breaking News:

More Coverage


Search for Dark Matter: Experiment Measures Antimatter Excess in Cosmic Ray Flux

Apr. 3, 2013 — The international team running the Alpha Magnetic Spectrometer (AMS) today announced the first results in its search for dark matter. They report the observation of an excess of positrons in the ... read more

Strange & Offbeat Stories

 

Health & Medicine

Mind & Brain

Living & Well

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:  

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile iPhone Android Web
Follow Facebook Twitter Google+
Subscribe RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins