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Title: EMMA-a new underground cosmic-ray experiment

Abstract

An experiment observing underground muons originating from cosmic-ray air showers is under preparation in the Pyhaesalmi mine, Finland. The aim is to cover an area of about 200-300 m{sup 2}, and the detector setup is capable of measuring the muon multiplicity and their lateral distribution. The detector is placed at a depth of about 85 m (corresponding about 240 m w.e.), which gives a threshold energy of muons of about 45 GeV. The detection of the multimuon events is motivated by partly unknown composition of the primary cosmic rays in the energy region of 10{sup 15}-10{sup 16} eV, i.e., the knee region. In addition, by measuring only the higher energy muons of the air shower, the lowest energy muons being filtered out by the rock overburden, the data is sensitive also to the studies of the upper parts of the air shower. The experiment will be constructed mainly using drift chambers used previously in LEP detectors at CERN, but it can also be expanded using plastic scintillator detectors. The prototype detector is expected to be running in the beginning of 2006, and the full-size detector by the end of 2007.

Authors:
; ;  [1];  [2];  [1]; ; ; ; ; ; ; ;  [3]; ;  [1]; ;  [3];  [1];  [4];  [5]
  1. CUPP (Finland)
  2. University of Jyvaeskylae, Department of Physics (Finland)
  3. University of Oulu, CUPP (Finland)
  4. University of Oulu, SGO (Finland)
  5. Chinese Academy of Sciences, IHEP (China) (and others)
Publication Date:
OSTI Identifier:
21075956
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Atomic Nuclei; Journal Volume: 70; Journal Issue: 1; Other Information: DOI: 10.1134/S1063778807010206; Copyright (c) 2007 Nauka/Interperiodica; Article Copyright (c) 2007 Pleiades Publishing, Ltd; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; CERN; DISTRIBUTION; DRIFT CHAMBERS; EXTENSIVE AIR SHOWERS; FINLAND; GEV RANGE 10-100; LEP STORAGE RINGS; MULTIPLICITY; MUONS; OVERBURDEN; PEV RANGE; PLASTIC SCINTILLATORS; PRIMARY COSMIC RADIATION; RADIATION DETECTION; THRESHOLD ENERGY; UNDERGROUND

Citation Formats

Enqvist, T., E-mail: timo.enqvist@oulu.fi, Foehr, V., Joutsenvaara, J., Keraenen, P., Kuusiniemi, P., Laitala, H., Lehtola, M., Mattila, A., Narkilahti, J., Nurmenniemi, S., Peltoniemi, J., Remes, H., Raeihae, T., Shen, C., Reponen, M., Sarkamo, J., Vaittinen, M., Zhang, Z., Jaemsen, T., and Ding, L. EMMA-a new underground cosmic-ray experiment. United States: N. p., 2007. Web. doi:10.1134/S1063778807010206.
Enqvist, T., E-mail: timo.enqvist@oulu.fi, Foehr, V., Joutsenvaara, J., Keraenen, P., Kuusiniemi, P., Laitala, H., Lehtola, M., Mattila, A., Narkilahti, J., Nurmenniemi, S., Peltoniemi, J., Remes, H., Raeihae, T., Shen, C., Reponen, M., Sarkamo, J., Vaittinen, M., Zhang, Z., Jaemsen, T., & Ding, L. EMMA-a new underground cosmic-ray experiment. United States. doi:10.1134/S1063778807010206.
Enqvist, T., E-mail: timo.enqvist@oulu.fi, Foehr, V., Joutsenvaara, J., Keraenen, P., Kuusiniemi, P., Laitala, H., Lehtola, M., Mattila, A., Narkilahti, J., Nurmenniemi, S., Peltoniemi, J., Remes, H., Raeihae, T., Shen, C., Reponen, M., Sarkamo, J., Vaittinen, M., Zhang, Z., Jaemsen, T., and Ding, L. Mon . "EMMA-a new underground cosmic-ray experiment". United States. doi:10.1134/S1063778807010206.
@article{osti_21075956,
title = {EMMA-a new underground cosmic-ray experiment},
author = {Enqvist, T., E-mail: timo.enqvist@oulu.fi and Foehr, V. and Joutsenvaara, J. and Keraenen, P. and Kuusiniemi, P. and Laitala, H. and Lehtola, M. and Mattila, A. and Narkilahti, J. and Nurmenniemi, S. and Peltoniemi, J. and Remes, H. and Raeihae, T. and Shen, C. and Reponen, M. and Sarkamo, J. and Vaittinen, M. and Zhang, Z. and Jaemsen, T. and Ding, L.},
abstractNote = {An experiment observing underground muons originating from cosmic-ray air showers is under preparation in the Pyhaesalmi mine, Finland. The aim is to cover an area of about 200-300 m{sup 2}, and the detector setup is capable of measuring the muon multiplicity and their lateral distribution. The detector is placed at a depth of about 85 m (corresponding about 240 m w.e.), which gives a threshold energy of muons of about 45 GeV. The detection of the multimuon events is motivated by partly unknown composition of the primary cosmic rays in the energy region of 10{sup 15}-10{sup 16} eV, i.e., the knee region. In addition, by measuring only the higher energy muons of the air shower, the lowest energy muons being filtered out by the rock overburden, the data is sensitive also to the studies of the upper parts of the air shower. The experiment will be constructed mainly using drift chambers used previously in LEP detectors at CERN, but it can also be expanded using plastic scintillator detectors. The prototype detector is expected to be running in the beginning of 2006, and the full-size detector by the end of 2007.},
doi = {10.1134/S1063778807010206},
journal = {Physics of Atomic Nuclei},
number = 1,
volume = 70,
place = {United States},
year = {Mon Jan 15 00:00:00 EST 2007},
month = {Mon Jan 15 00:00:00 EST 2007}
}