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Colloquium Speaker: Dr. Chithra Nair

Oct 24, 2012

PHYSICS COLLOQUIUM
Speaker: Dr. Chithra Nair
Date: Friday, November 2
Time: 4 PM
Room: 205 Currens Hall

Accelerator Mass Spectrometry (AMS) detection system for actinides at the Argonne Fragment Mass Analyzer

Abstract:

The AMS (Accelerator Mass Spectrometry) project at ATLAS (Argonne Tandem Linac Accelerator System) complements the MANTRA (Measurement of Actinides Neutron TRAnsmutation) experimental campaign. The principal aim of this work is to obtain valuable integral information on the neutron cross sections of very high mass actinides that are of importance for Advanced Nuclear Fuel cycles (AFC). The irradiated samples from the Advanced Test Reactor (ATR) at the Idaho National Laboratory are studied via AMS at Argonne National Laboratory. The different actinides that are built up during the irradiation at ATR can be accurately measured to high levels of sensitivity using AMS.

The ATLAS AMS is based on the production of highly-charged positive ions in an electron cyclotron resonance ion source (ECRIS) followed by linear acceleration and separation by electromagnetic means. The ions are further separated and mass (A) identified in a fragment mass analyzer (FMA) system. For unique Z identification and discrimination from a stable isobar that interferes with detection of the ion type of interest, dE/dx measurements are made using highly sophisticated detectors. The project progress as well as results from the first test run will be discussed

About the speaker:
Dr. Chithra Nair is a post-doctoral researcher at the Argonne National Laboratories. She is a nuclear Physicist, with research expertise in Nuclear Astrophysics and Structure Physics. Medical Isotope production is one of her strong research interests. She has been performing ATLAS experiments at the Argonne National Laboratory for the past 2.5 years.


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