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Published March 3, 2003 | Published
Book Section - Chapter Open

California HIgh school Cosmic ray ObServatory (CHICOS)


The California HIgh school Cosmic ray ObServatory (CHICOS) is a collaborative project involving Caltech, Cal State Northridge, UC Irvine, and local high schools to site a large array of particle detectors in Southern California. The detectors are located on school rooftops, and utilize the power and network infrastructure available at the schools. The main scientific goal is to study cosmic rays at ultra-high energies E > 10^(19) eV. We have fielded a total of 23 sites so far, and are beginning to collect data as we continue to deploy additional sites. We have observed our first evidence of extended air showers in coincidence with a local high school. The anticipated performance of the initial array and the potential for future expansion will be discussed.

Additional Information

© 2003 Society of Photo-Optical Instrumentation Engineers (SPIE). We are grateful for the generous support of Caltech and the Weingart Foundation in initiating this project. The donation of the detectors by the CYGNUS collaboration is gratefully acknowledged. Support from the National Science Foundation (grants PHY-7701856 and PHY-0102502) and the donation of computers for the project by IBM Corporation are also acknowledged. The volunteer efforts of many high school and middle school teachers (see http://www.chicos.caltech.edu/collaboration/collaboration-list.html) have been essential in the deployment and operation of the CHICOS array, and we are delighted to acknowledge their participation.

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