Collar Group Website non-accelerator particle physics Kavli Institute for Cosmological Physics
Research projects


Home
Research Projects
Group Members
Our Laboratory
News & Recent Publications
Photo Galleries & Multimedia
Links
Site Map & Search

News
A COUPP is in the making: A new experimental effort to search for particle dark matter, the Chicagoland Observatory for Underground Particle Physics (COUPP) will debut at the end of summer 2004. A prototype bubble chamber sensitive to Weakly Interacting Massive Particles (WIMPs), developed by our group, is to be installed in the MINOS near detector gallery at Fermilab. [more]


 
Axions
Neutrino Detectors
WIMP Detectors (WIMPs)
Other Starting Efforts
 

Axions

Go to top
 

Axions: CAST (CERN Axion Solar Telescope) is a search for axions or axion-like particles originating from the solar core. In order to detect these hypothetical particles, first proposed to solve the strong CP problem in QED, CAST uses the Primakoff effect, i.e., the ability to convert axions into detectable photons in the presence of a strong magnetic field perpendicular to the direction of propagation of the axion. For this CAST uses a 9.5 T, 10 m long cryogenic LHC dipole magnet mounted on a moving platform that allows solar tracking at sunrise and sunset every day of the year. Low-background photon detectors at both ends of the magnet complete this unique telescope.

Our group is responsible for the solar tracking system, which effectively converts 30 tons of cryogenic equipment and photon detectors into an astronomical telescope. [more]

 
 

Neutrino Detectors

Go to top
 

Neutrino Detectors: Development of detectors sensitive to coherent neutrino-nucleus scattering.

Several detector technologies in principle able to evidence the sub-keV recoils expected from this mode of neutrino scattering have been developed.
One utilizes the novel micropatterned gaseous detectors mass-produced for the first time by our group in collaboration with 3M. By means of a quadruple Gas Electron Multiplier (GEM) our group has been able to demonstrate sensitivity to single electrons in a gaseous device. A two-phase detector (i.e., a cryogenic device containing both the liquid and gaseous phase of a noble gas) is being considered towards the goal of packing enough target mass to make a reactor neutrino experiment feasible.
Another new detector technology, cooled Large Area Avalanche Photodiodes (LAAPDs), is being tested for the same purpose. A cryostat has been built to cool 1.3x1.3 cm LAAPDs to liquid nitrogen temperature, where it is possible to reach gains of a few thousand in very low-noise conditions. Our group has been able to demonstrate sensitivity to single photons at this temperature with a high quantum efficiency. [more]

 
 

WIMP Detectors (WIMPs)

Go to top
 

WIMP Detectors: Learn about COUPP (the Chicagoland Observatory for Underground Particle Physics), our Bubble Chamber search for Weakly Interacting Massive Particles (WIMPs):
A new experimental effort to search for particle dark matter, the Chicagoland Observatory for Underground Particle Physics will debut at the end of summer 2004. A prototype bubble chamber sensitive to Weakly Interacting Massive Particles (WIMPs), developed by our group, is to be installed in the MINOS near detector gallery at Fermilab (FNAL). The chamber will contain two kg of CF3I, a fire-extinguishing liquid that can be superheated to respond to very low energy nuclear recoils like those expected from WIMPs while being totally insensitive to minimum ionizing particles, the dominant background in this type of searches. [more]

 
 

Other Starting Efforts

Go to top
 

See everything else we are doing, or starting, or wishing we had the time to start.
Courageous students willing to help are always welcome.

Several projects are finding their way from the backburner to the front, you will soon find information on them in this page:

New additions to CAST's arsenal of axion detectors (in progress)
New approaches to high density detectors with directional sensitivity to WIMP-induced recoils (in progress)
A new solar axion detector based on enriched Kr-83 (in progress)
Some scattered ideas on new approaches to relic neutrino detection
An attempt to demonstrate sensitivity to the thermoacoustic effect induced by nuclear recoils in fibers.

 
 
KICP Links: About KICPResearchEducation&OutreachNewsPeopleSeminarsWorkshops

Telephone:

   

(773) 702-4253

Fax:

   

(773) 834-8279

E-mail:

   

collaruchicago.edu

Postal Address:

   

5640 S. Ellis Ave., LASR 214, Chicago, IL 60637

Webmaster:

   

egaltsevakicp.uchicago.edu

Last update:

   

March 20, 2005