Results from the CACTI experiment: Air-Cerenkov and particle measurements of PeV air showers at Los Alamos

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An array of six wide angle Cerenkov detectors was constructed amongst the scintillator and muon detectors of the CYGNUS II array at Los Alamos National Laboratory to investigate cosmic ray composition in the PeV region through measurements of the shape of Cerenkov lateral distributions. Data were collected during clear, moonless nights over three observing periods in 1995. Estimates of depths of shower maxima determined from the recorded Cerenkov lateral distributions align well with existing results at higher energies and suggest a mixed to heavy composition in the PeV region with no significant variation observed around the knee. The accuracy of ... continued below

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6 p.

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Paling, S.; Hillas, A.M. & Berley, D. July 1, 1997.

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An array of six wide angle Cerenkov detectors was constructed amongst the scintillator and muon detectors of the CYGNUS II array at Los Alamos National Laboratory to investigate cosmic ray composition in the PeV region through measurements of the shape of Cerenkov lateral distributions. Data were collected during clear, moonless nights over three observing periods in 1995. Estimates of depths of shower maxima determined from the recorded Cerenkov lateral distributions align well with existing results at higher energies and suggest a mixed to heavy composition in the PeV region with no significant variation observed around the knee. The accuracy of composition determination is limited by uncertainties in the expected levels of depth of maximum predicted using different Monte-Carlo shower simulation models.

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6 p.

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OSTI as DE98001535

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  • 25. international cosmic ray conference, Durban (South Africa), Jul 1997

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  • Other: DE98001535
  • Report No.: LA-UR--97-3910
  • Report No.: CONF-9707103--
  • Grant Number: W-7405-ENG-36
  • Office of Scientific & Technical Information Report Number: 658326
  • Archival Resource Key: ark:/67531/metadc709859

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  • July 1, 1997

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  • Sept. 12, 2015, 6:31 a.m.

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  • May 5, 2016, 7:20 p.m.

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Paling, S.; Hillas, A.M. & Berley, D. Results from the CACTI experiment: Air-Cerenkov and particle measurements of PeV air showers at Los Alamos, article, July 1, 1997; New Mexico. (digital.library.unt.edu/ark:/67531/metadc709859/: accessed September 26, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.