Featured Research

from universities, journals, and other organizations

New Superconducting Magnet To Probe Proton Structure

Date:
February 21, 2001
Source:
University Of Illinois At Urbana-Champaign
Summary:
To help unlock the innermost secrets of the proton, a doughnut-shaped superconducting magnet 14 feet in diameter is now being tested at the University of Illinois. Funded by the National Science Foundation, the $2.75 million magnet was designed for an upcoming experiment at the Thomas Jefferson National Accelerator Facility in Newport News, Va.

Champaign, IL — To help unlock the innermost secrets of the proton, a doughnut-shaped superconducting magnet 14 feet in diameter is now being tested at the University of Illinois.

Related Articles


Funded by the National Science Foundation, the $2.75 million magnet was designed for an upcoming experiment at the Thomas Jefferson National Accelerator Facility in Newport News, Va. The experiment, called G0 (pronounced “Gee Zero”), involves about 100 scientists from many institutions. Steve Williamson, a UI physicist, is the experiment coordinator.

Over the next few months, researchers will meticulously inspect the magnet, cool it to liquid-helium temperatures and turn it on for the first time. As the power is gradually increased, a robotic test rig will precisely monitor the growing magnetic-field strength in three-dimensional space, and alert the researchers to potential problems.

Late this year, with testing complete, the magnet is scheduled to be shipped to the Jefferson facility. There it will serve as the centerpiece of the G0 experiment – a major effort to closely examine the role that the strange quark plays in generating proton structure and nuclear magnetism.

“We know that the proton’s structure – in particular, its magnetic moment – comes from the up, down and strange quarks inside the proton,” said UI physicist Doug Beck, spokesman for the experiment. “But exactly how it is put together is what we are trying to find out.”

In the experiment, an intense beam of polarized electrons will scatter off liquid hydrogen and deuterium targets located in the magnet’s core. Detectors, mounted around the perimeter of the magnet, will record the number and position of the scattered particles.

The new magnet will provide a much broader view of the small-scale structure of the proton, compared to earlier “snapshots” obtained with other experiments, such as the SAMPLE apparatus at the MIT/Bates Linear Accelerator Center, Beck said.

In SAMPLE experiments conducted during the summer of 1999, and reported in the Dec. 15, 2000, issue of the journal Science, researchers used the weak magnetic force to deduce the presence of a surprisingly large parity-violating electromagnetic effect known as the proton’s anapole moment. The proton’s anapole moment had long been predicted, but never measured.

“The new magnet should allow measurement of the anapole moment and other aspects of the proton structure with much greater precision over a wide range of momentum transfers,” Beck said. “For example, instead of seeing the proton’s overall magnetic moment, we will be able to vary the size of our probe to study small structures within the proton.”

The 80,000-pound magnet was constructed by BWXT in Lynchburg, Va., and required three years to build. It was moved to the UI in mid-December. A photograph of the magnet being readied for testing can be found at http://www.news.uiuc.edu/scitips/01/01magnet.html.


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 Superconducting Magnet To Probe Proton Structure." ScienceDaily. ScienceDaily, 21 February 2001. <www.sciencedaily.com/releases/2001/02/010205075911.htm>.
University Of Illinois At Urbana-Champaign. (2001, February 21). New Superconducting Magnet To Probe Proton Structure. ScienceDaily. Retrieved November 23, 2014 from www.sciencedaily.com/releases/2001/02/010205075911.htm
University Of Illinois At Urbana-Champaign. "New Superconducting Magnet To Probe Proton Structure." ScienceDaily. www.sciencedaily.com/releases/2001/02/010205075911.htm (accessed November 23, 2014).

Share This


More From ScienceDaily



More Matter & Energy News

Sunday, November 23, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Toyota's Hydrogen Fuel-Cell Green Car Soon Available in the US

Toyota's Hydrogen Fuel-Cell Green Car Soon Available in the US

AFP (Nov. 21, 2014) — Toyota presented its hydrogen fuel-cell compact car called "Mirai" to US consumers at the Los Angeles auto show. The car should go on sale in 2015 for around $60.000. It combines stored hydrogen with oxygen to generate its own power. Duration: 01:18 Video provided by AFP
Powered by NewsLook.com
Google Announces Improvements To Balloon-Borne Wi-Fi Project

Google Announces Improvements To Balloon-Borne Wi-Fi Project

Newsy (Nov. 21, 2014) — In a blog post, Google said its balloons have traveled 3 million kilometers since the start of Project Loon. Video provided by Newsy
Powered by NewsLook.com
Raw: Paralyzed Marine Walks With Robotic Braces

Raw: Paralyzed Marine Walks With Robotic Braces

AP (Nov. 21, 2014) — Marine Corps officials say a special operations officer left paralyzed by a sniper's bullet in Afghanistan walked using robotic leg braces in a ceremony to award him a Bronze Star. (Nov. 21) Video provided by AP
Powered by NewsLook.com
British 'Bio-Bus' Is Powered By Human Waste

British 'Bio-Bus' Is Powered By Human Waste

Buzz60 (Nov. 21, 2014) — British company GENeco debuted what its calling the Bio-Bus, a bus fueled entirely by biomethane gas produced from food scraps and sewage. Jen Markham explains. Video provided by Buzz60
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:

Strange & Offbeat Stories

 

Space & Time

Matter & Energy

Computers & Math

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