Particles from Space Test New Muon Detection System

Dec 14, 2006
Particles from Space Test New Muon Detection System
A 'wires view' of a muon tracked by BaBar's new identification system. Credit: SLAC

The newly installed muon identification system in the BaBar detector is working beautifully. Taking advantage of naturally occurring cosmic rays, the BaBar team has been testing the new detection system in preparation for the January start-up.

Earthly cosmic rays come mostly from protons in outer space. When the protons hit the air in our upper atmosphere, the interactions produce a shower of particles, many of which decay to muons that live long enough to reach the Earth's surface and the BaBar detector.

As the image at right shows, the new Limited Streamer Tubes (LSTs) are tracking muons in the outer, hexagonal-shaped layer of the detector. LSTs replaced the original muon system in two of the hexagon's six sextants in 2004. Crews upgraded the remaining four sextants during the current shut-down.

"The straightness of the measured muon track and the lack of missing hits along it indicate that the detectors are working well and have been connected properly," said LST co-commissioner Mark Convery. Co-commissioner Gianluigi Cibinetto notes that the lack of spurious hits in the detector promises a clean identification environment for muons for the rest of the experiment.

See more images here.

Source: by Heather Rock Woods, SLAC

Explore further: Researchers demonstrate ultra low-field nuclear magnetic resonance using Earth's magnetic field

add to favorites email to friend print save as pdf

Related Stories

Rebooted muon experiment tests detector design at SLAC

Aug 07, 2014

Last year, a monster magnet set out from Brookhaven National Lab on an epic, 35-day trek by land and sea to its new home at Fermilab, where it will serve as the heart of a search for evidence of new subatomic ...

50-foot-wide Muon g-2 electromagnet installed at Fermilab

Jul 31, 2014

One year ago, the 50-foot-wide Muon g-2 electromagnet arrived at the U.S. Department of Energy's Fermi National Accelerator Laboratory in Illinois after traveling 3,200 miles over land and sea from Long Island, ...

Upgrading the Large Hadron Collider

Jul 09, 2014

Scientists from the Particle Physics Research Group at the University of Bristol are currently working on upgrades to the Large Hadron Collider (LHC), the particle accelerator and collider located at CERN ...

Muon detector could help UK reduce carbon emissions

Jun 13, 2014

A specialist detector which is set to play a fundamental part in helping the UK reduce its carbon emissions is being developed as part of a collaborative project involving physicists at the University of Sheffield.

Recommended for you

User comments : 0