Featured Research

from universities, journals, and other organizations

New Trigger Will Aid In Detecting Bottom Quarks

Date:
August 4, 1999
Source:
University Of Illinois At Urbana-Champaign
Summary:
An electronic device being designed and built at the University of Illinois will assist experimenters at a major accelerator by distinguishing between "good" and "bad" collisions. The device is called a "trigger," and is part of an upgrade being performed on the Cornell Electron Storage Ring -- a synchrotron particle accelerator at Cornell University.

CHAMPAIGN, Ill. -- An electronic device being designed and built at the University of Illinois will assist experimenters at a major accelerator by distinguishing between "good" and "bad" collisions.

The device is called a "trigger," and is part of an upgrade being performed on the Cornell Electron Storage Ring -- a synchrotron particle accelerator at Cornell University. Mats Selen, a professor of physics at the U. of I., is directing a team of scientists and engineers responsible for building the trigger, and for interfacing the device with the accelerator's CLEO detector and data-acquisition system.

"At CESR, electrons and positrons [a positron is the antiparticle of an electron] are accelerated to extremely high speeds," Selen said. "These tiny particles are then slammed together in head-on collisions, which in turn produce the even tinier bits of matter that we want to study."

Of course, there really are no good and bad collisions, Selen said, but there are some that are much more interesting than others. "Searching for the most interesting events is like panning for gold. Just as you need to sift through tons of sand to find that elusive gold nugget, we must sift through tons of collisions to find the ones we want. We are building a better sifter to help us find those events."

Selen's team is particularly interested in identifying collisions that create bottom quarks -- the second heaviest variety of these elementary particles. Like tiny Lego blocks, quarks compose all baryonic matter. Studying the way bottom quarks are produced and the way they decay into lighter quarks provides essential information about the fundamental rules for assembling matter.

"Collisions in CLEO can occur 20 million times a second, but we can only record the data one thousand times a second," Selen said. "The trigger's job is to monitor all aspects of the experiment and to distinguish between interesting and non-interesting collisions, and to do so very quickly."

Every 42 nanoseconds the trigger will take a "snapshot" of what it sees in the detector, and then process that information for about 2 microseconds before deciding whether to save or discard the data.

"The trigger will look at thousands of signals from various parts of the detector, and very quickly perform pattern recognition," Selen said. "When an interesting pattern is found, the trigger will tell the computer to save all the data."

Technically, by the time the trigger has made up its mind, the information already has come and gone, Selen said. "So the data must be stored temporarily until the decision is made to toss it or send it to the data-acquisition system."

Selen's U. of I. team includes research engineer Mike Haney, physics professor George Gollin, postdoctoral research associates Randal Hans and Jesse Ernst, and graduate students Tim Bergfeld, Ed Johnson, Charles Plager, Chris Sedlack and Jeremy Williams.

The trigger is being funded by the National Science Foundation and the U.S. Department of Energy.


Story Source:

The above story is based on materials provided by University Of Illinois At Urbana-Champaign. Note: Materials may be edited for content and length.


Cite This Page:

University Of Illinois At Urbana-Champaign. "New Trigger Will Aid In Detecting Bottom Quarks." ScienceDaily. ScienceDaily, 4 August 1999. <www.sciencedaily.com/releases/1999/08/990804072619.htm>.
University Of Illinois At Urbana-Champaign. (1999, August 4). New Trigger Will Aid In Detecting Bottom Quarks. ScienceDaily. Retrieved July 22, 2014 from www.sciencedaily.com/releases/1999/08/990804072619.htm
University Of Illinois At Urbana-Champaign. "New Trigger Will Aid In Detecting Bottom Quarks." ScienceDaily. www.sciencedaily.com/releases/1999/08/990804072619.htm (accessed July 22, 2014).

Share This




More Matter & Energy News

Tuesday, July 22, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Government Approves East Coast Oil Exploration

Government Approves East Coast Oil Exploration

AP (July 18, 2014) The Obama administration approved the use of sonic cannons to discover deposits under the ocean floor by shooting sound waves 100 times louder than a jet engine through waters shared by endangered whales and turtles. (July 18) Video provided by AP
Powered by NewsLook.com
Sunken German U-Boat Clearly Visible For First Time

Sunken German U-Boat Clearly Visible For First Time

Newsy (July 18, 2014) The wreckage of the German submarine U-166 has become clearly visible for the first time since it was discovered in 2001. Video provided by Newsy
Powered by NewsLook.com
Obama: U.S. Must Have "smartest Airports, Best Power Grid"

Obama: U.S. Must Have "smartest Airports, Best Power Grid"

Reuters - US Online Video (July 17, 2014) President Barak Obama stopped by at a lunch counter in Delaware before making remarks about boosting the nation's infrastructure. Mana Rabiee reports. Video provided by Reuters
Powered by NewsLook.com
Crude Oil Prices Bounce Back After Falling Below $100 a Barrel

Crude Oil Prices Bounce Back After Falling Below $100 a Barrel

TheStreet (July 16, 2014) Oil Futures are bouncing back after tumbling below $100 a barrel for the first time since May yesterday. Jeff Grossman is the president of BRG Brokerage and trades at the NYMEX. Grossman tells TheStreet the Middle East is always a concern for oil traders. Oil prices were pushed down in recent weeks on Libya increasing its production. Supply disruptions in Iraq fading also contributed to prices falling. News from China's economic front showing a growth for the second quarter also calmed fears on its slowdown. Jeff Grossman talks to TheStreet's Susannah Lee on this and more on the Energy Department's Energy Information Administration (EIA) report. Video provided by TheStreet
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:
from the past week

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