Tuesday, February 14, 2006, 3:30 pm — Large Seminar Room, Bldg. 510
Ultra high energy cosmic rays of energy larger than $10^{20}$ eV have been detected by to experiments, AGASA and HiRes. The nature and origin of these particles are unknown. The Auger observatory, now under construction, will cover a detection area of 3000 $km^2$ when completed and will use a hybrid technology for the UHECR detection. To detect large numbers of events at this energy range detectors that allows for large area coverage are needed. Currently, new techniques are being developed to reach this goal. The direct radio emission from cosmic ray shower (via geo-synchrotron radiation) is being explored by LOPES and CODALEMA. Detection of fluorescence light from space is being pursued by EUSO. MARIACHI, which stands for Mixed
Apparatus for the Radar Investigation of Cosmic-rays of High
Ionization, seeks the detection of these particles via radar. The heart of the technique is to explore the electromagnetic wave reflection of an ionization cloud as used for meteor detection. The major issue for UHECR detection is the lifetime of the ionization produced by the shower that need to be understood in depth. Steps towards experimental measurements of ionization properties are under
way. In parallel a demonstration experiment is being assembled. The design includes for a three parasitic bi-static radar system, multiple shower arrays that will be used to confirm the radar signal, and a distributed data acquisition system synchronized by high resolution GPS clocks. MARIACHI has a strong education and outreach
component since it deploys shower detectors in high schools. We will discuss the experiment and present its present status.
Hosted by: Raju Venugopalan
2815 | INT/EXT | Events Calendar
Not all computers/devices will add this event to your calendar automatically.
A calendar event file named "calendar.ics" will be placed in your downloads location. Depending on how your device/computer is configured, you may have to locate this file and double click on it to add the event to your calendar.
Event dates, times, and locations are subject to change. Event details will not be updated automatically once you add this event to your own calendar. Check the Lab's Events Calendar to ensure that you have the latest event information.