International Noble Gas Experiment

The International Noble Gas Experiment (INGE) was formed in 1999 as an informal expert's group of developers of radioactive xenon measurement systems for the International Monitoring System for the Comprehensive Nuclear-Test-Ban Treaty (CTBT). The group originally consisted of research and development groups from Germany, France, Russia, Sweden, and the United States, as well as personnel from Provisional Technical Secretariat of the Comprehensive Nuclear-Test-Ban Treaty Organization CTBTO.

The INGE group was formed to test aspects of measuring xenon fission product radionuclides released by nuclear explosions. The systems developed and participating in the INGE measure xenon isotopes in the atmosphere and includes ^131mXe, ¹³³Xe, ^133mXe, and ¹³⁵Xe.

Since the INGE was formed in 1999, the group has expanded somewhat and now includes R&D and operational groups from many locations around the world. Although there is no official list of INGE members, the group is informally composed of scientists, engineers, and others from Austria, Australia, Brazil, Canada, China, France, Germany, Japan, Norway, Sweden, Russia, the United States, and several other countries. These members regularly contribute to better understanding radioactive xenon measurements through operation of samplers, measurements of background at various locations, creation of data analysis routines, etc.

Staff from the CTBTO oversaw the experiment, with technical assistance from a German group of noble gas experts from the BfS in Freiburg, Germany. As of 2008, the experiment is still on-going, and so far it has consisted of 3 phases:

INGE Phase 1

The first phase of the INGE experiment took place in the laboratories. Four systems were developed to the point that they could measure xenon concentrations to specifications laid out by the CTBTO Preparatory Commission.

INGE Phase 2

The second phase of the INGE experiment took place in Freiburg, Germany, a location far away from the developers laboratories.

Phase 2: Use of Radioxenon Monitoring Equipment in Freiburg [Auer M., A. Axelsson, X. Blanchard, T.W. Bowyer, G. Brachet, I. Bulowski, Y. Dubasov, K. Elmgren, J.P.Fontaine, W. Harms, J.C. Hayes, T.R. Heimbigner, J.I. McIntyre, M.E. Panisko, Y. Popov, A. Ringbom, H.Sartorius, S. Schmid, J. Schulze, C. Schlosser, T. Taffary, W. Weiss, and B. Wernsperger. 2004.Intercomparison experiments of systems for the measurement of xenon radionuclides in the atmosphere.Applied Radiation and Isotopes 60:863–877.] [Bowyer, T.W., C. Schlosser, K.H. Abel, M. Auer, J.C. Hayes, T.R. Heimbigner, J.I. McIntyre, M.E. Panisko,P.L. Reeder, H. Sartorius, J. Schulze, and W. Weiss. 2002. Detection and analysis of xenon isotopes for theComprehensive Nuclear-Test-Ban Treaty international monitoring system. Journal of EnvironmentalRadioactivity 59:139–151.]

The four measurement systems tested in Phase 2 had favorable results in that all of the systems met CTBTO minimum specifications and agreed with the independent analyses provided by [http://www.bfs.de/bfs BfS] .

INGE Phase 3

Phase 3, which was separated into a, b, and c components was designed primarily to test commercial versions of the systems designed and tested in INGE Phase 2. The commercial version of the SAUNA (the [http://www.gammadata.se/ULNewsFiles/SAUNA_web.pdf SAUNA-II] ) is now being manufactured by [http://www/gammdata.se Gammadata, Inc.] and the [http://www.ellettiambiente.com/elletti/Strumenti%20Aria/Brochure-Spalax261005-uk.pdf SPALAX] is being produced commercially by [http://www.sfi-france.com/ Societé Française d’Ingenierie (SFI)] .

There has been a number of workshops to discuss various aspects of the experiment and to discuss worldwide backgrounds of radioxenon.

1999 - Freiburg, Germany
1999 - Freiburg, Germany
2000 - Freiburg, Germany
2000 - Freiburg, Germany
2001 - Stockholm, Sweden
2002 - Tahiti, French Polynesia
2002 - Richland, Washington, United States
2003 - Ottawa, Canada
2004 - Strassoldo, Italy
2005 - Stockholm, Sweden
2006 - Melbourne, Australia
2007 - Las Vegas, Nevada, United States
2008 - St. Petersburg, Russian Federation

References