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Space Science Reviews

, Volume 93, Issue 1–2, pp 335–359 | Cite as

Neutron Monitor Response Functions

  • John M. Clem
  • Lev I. Dorman
Article

Abstract

The neutron monitor provides continuous ground-based recording of the hadronic component in atmospheric secondary radiation which is related to primary cosmic rays. Simpson (1948) discovered that the latitude variation of the secondary hadronic component was considerably larger than the muon component suggesting the response of a neutron monitor is more sensitive to lower energies in the primary spectrum. The different methods of determining the neutron monitor response function of primary cosmic rays are reviewed and discussed including early and recent results. The authors also provide results from a new calculation (Clem, 1999) including angle dependent yield functions for different neutron monitor types which are calculated using a simulation of cosmic ray air showers combined with a detection efficiency simulation for different secondary particle species. Results are shown for IGY and NM64 configurations using the standard 10BF3 detectors and the new 3He detectors to be used in the Spaceship Earth Project (Bieber et al., 1995). The method of calculation is described in detail and the results are compared with measurements and previous calculations. A summary of future goals is discussed.

Keywords

Yield Function Neutron Monitor Primary Spectrum Solar Neutron Geomagnetic Cutoff 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. Allkofer, O. and Grieder, P.: 1984, 'Cosmic Rays on Earth', Fachinformationszentrum, Karlsruhe.Google Scholar
  2. Badwhar, G. D. and O'Neill, P. M.: 1996, 'Galactic Cosmic Radiation Model and its Applications', Adv. Space Res. 17, 7–17.CrossRefADSGoogle Scholar
  3. Belov, A. V. and Struminsky, A. B.: 1997, 'Neutron Monitor Sensitivity to Primary Protons Below 3 GeV Derived From Data of Ground Level Events', Proc. 25th Int. Cosmic Ray Conf., Durban 1, 201.Google Scholar
  4. Belov, A., Struminsky, A., and Yanke, V.: 1999, 'Neutron Monitor Response Functions for Galactic and Solar Cosmic Rays', ISSI Workshop on Cosmic Rays and Earth, poster presentation and personal communication.Google Scholar
  5. Bercovitch, M. and Robertson, B.: 1966, 'Meteorological Factors Affecting the Counting Rate of Neutron Monitors', Proc. 9th Int. Cosmic Ray Conf., London 1, 489.Google Scholar
  6. Bieber, J. and Evenson, P.: 1995, 'Spaceship Earth – An Optimized Network of Neutron Monitors', Proc. 24th Int. Cosmic Ray Conf., Rome 4, 1316.Google Scholar
  7. Bieber, J. and Evenson, P., Humble, J., and Duldig, M.: 1997, 'Cosmic Ray Spectra Deduced from Neutron Monitor Surveys', Proc. 25th Int. Cosmic Ray Conf., Durban 2, 45–48.Google Scholar
  8. Brown, R.: 1957, 'Neutron Yield Functions of the Nucleonic Component of Cosmic Radiation', Nuovo Cimento 6, 2816.Google Scholar
  9. Bütikofer, R. and Flückiger, E.: 1999, 'Pressure Correction of GLE Measurements in Turbulent Winds', Proc. 26th Internat. Cosmic Ray Conf., Salt Lake City, 6, 395Google Scholar
  10. Carmichael, H., Shea, M., and Peterson, R.: 1969a, 'III. Cosmic-ray Survey in Western USA and Hawaii in Summer, 1966', Can. J. Phys. 47, 2057.ADSGoogle Scholar
  11. Carmichael, H. and Bercovitch, M.: 1969b, 'V. Analysis of IQSY Cosmic-ray Survey measurements', Can. J. Phys. 47, 2073.ADSGoogle Scholar
  12. Clem, J. M., Bieber, J.W., Evenson, P., Hall, D., Humble, J. E., and Duldig, M.: 1997, 'Contribution of Obliquely Incident particles to Neutron Monitor Counting Rate', J. Geophys. Res. 102, 26 919.CrossRefADSGoogle Scholar
  13. Clem, J. M.: 1999, 'Atmospheric Yield Functions and the Response to Secondary Particles of Neutron Monitors', Proc. 26th Int. Cosmic Ray Conf., Salt Lake City 7, 317.Google Scholar
  14. Cook, D. J., Humble, J. E., Shea, M. A., Smart, D. F., Lund, N., Rasmussen, I. L., Byrnak, B., Goret, P., and Petrou, N.: 1991, 'On Cosmic Ray Cut-Off Terminology', Nuovo Cimento 14C, 213–234.ADSGoogle Scholar
  15. Debrunner, H. and Brunberg, E.: 1968, 'Monte Carlo Calculation of Nucleonic Cascade in the Atmosphere', Can. J. Phys. 46, 1069.Google Scholar
  16. Debrunner, H., Lockwood, J., and Flückiger, E.: 1982, 8th Europe Cosmic Ray Symp., Rome, unpublished.Google Scholar
  17. Debrunner, H., Lockwood, J. A., Barat, C., Bütikoker, R., Dezalay, J. P., Flückiger, E., Kuznetsov, A., Ryan, J.M., Sunyaev, R., Terekhov, O. V., Trottet, G., and Vilmer, N.: 1997, 'Energetic Neutrons, Protons, and Gamma Rays During the 1990 May 24 Solar Cosmic-Ray Event', Astrophys. J. 479, 997.CrossRefADSGoogle Scholar
  18. Dorman, L.: 1957, 'Cosmic Ray Variations', State Publishing House for Technical and Theoretical Literature 102.Google Scholar
  19. Dorman, L. I.: 1970, 'Coupling and Barometer Coefficients for Measurements of Cosmic Ray Variations at Altitudes of 260–400 mb', Acta Phys. Acad. Sci. Hung. 29, 233.Google Scholar
  20. Dorman, L. and Yanke, V.: 1981, 'The Coupling Functions of NM-64 Neutron Supermonitor', Proc. 17th Int. Cosmic Ray Conf., Paris 4, 326.Google Scholar
  21. Duldig, M.: 2000, 'Muon Observations', Space Sci. Rev., this volume.Google Scholar
  22. Engel, J., Gaisser, T., Lipari, P., and Stanev, T.: 1992, 'Nucleus-Nucleus Collisions and Interpretation of Cosmic Ray Cascades', Phys. Rev. D46, 5013.ADSGoogle Scholar
  23. Fassò, A., Ferrari, A., Ranft, A., Sala, P. R., Stevenson, G. R., and Zazula, J. M.: 1993, 'A Comparison of FLUKA Simulations With Measurements of Fluence and Dose in Calorimeter Structures', Nucl. Instr. Meth. A332, 459.ADSGoogle Scholar
  24. Fassò, A., Ferrari, A., Ranft, A., and Sala, P. R.: 1997, Proc. of the 2nd Workshop on Simulating Accelerator Radiation Environment, SARE-2, CERN-Geneva, October 9–11 1995, CERN Divisional Report CERN/TIS-RP/97-05, 158.Google Scholar
  25. Fisk, L. A. and W. I. Axford: 1969, 'Solar Modulation of Galactic Cosmic Rays I.', J. Geophys. Res. 74, 4973.CrossRefADSGoogle Scholar
  26. Flückiger, E.: 1977, 'Theoretical Spectra of Cosmic Ray Neutrons in the Atmosphere for the Energy Range 50 MeV ≤ E ≤ 100 GeV', Proc. 15th Int. Cosmic Ray Conf., Plovdiv 4, 144.Google Scholar
  27. Fonger, W.: 1953, 'Cosmic Radiation Intensity-Time Variations and Their Origin. II. Energy Dependence of 27-Day Variation', Phys. Rev. 91, 351.CrossRefADSGoogle Scholar
  28. Gaisser, T.: 1990, Cosmic Rays and Particle Physics, Cambridge University Press, Cambridge.Google Scholar
  29. Garcia-Munoz, M., Meyer, P., Pyle, K. R., Simpson, J. A., and Evenson, P.: 1986, 'The Dependence of Solar Modulation on the Sign of the Cosmic Ray Particle Charge', J. Geophys. Res. 91, 2858.ADSCrossRefGoogle Scholar
  30. Hatton, C. J.: 1971, 'The NeutronMonitor', Progress in Elementary Particle and Cosmic Ray Physics X, American Elsevier Publishing Company, New York.Google Scholar
  31. Iucci, N., Villoresi, G., Dorman, L., and Parisi, M.: 1999, 'Cosmic Ray Survey to Antarctica and Coupling Functions for Neutron Component Near Solar Minimum (1996–1997) 2. Meteorological Effects and Correction of Survey Data', Proc. 26th Int. Cosmic Ray Conf., Salt Lake City 7, 321.Google Scholar
  32. Koi, T., Muraki, Y., Masuda, K., Matsubara, Y., Sakakibara, S., Sako, T., Murata, T., Tsuchiya, H., Kato, Y., Yuki, A., Shibata, S., Munakata, Y., Sakai, H., Nonaka, T., Ohnishi, T., Hatanaka, K., and Wakasa, T.: 1999, 'Attenuation of Solar Neutrons in the Air Determined by an Accelerator Experiment', Proc. of the 26th Int. Cosmic Ray Conf., Salt Lake City 7, 325.Google Scholar
  33. Lockwood, J., Webber, W., and Hsieh, L.: 1974, 'Solar Flare Proton Rigidity Spectra Deduced from Cosmic Ray Neutron Monitor Observations', J. Geophys. Res. 79, 4149.ADSCrossRefGoogle Scholar
  34. Lin, Z., Bieber, J. W., and Evenson, P.: 1995, 'Electron Trajectories in a Model Magnetosphere: Simulation and Observation Under Active Conditions', J. Geophys. Res. 100, 23 543.ADSGoogle Scholar
  35. Moraal, H., Potgieter, M. S., Stoker, P. H., and van der Walt, A. J.: 1989, 'Neutron Monitor Latitude Survey of Cosmic Ray Intensity During the 1986/1987 Solar Minimum', J. Geophys. Res. 94, 1459.ADSCrossRefGoogle Scholar
  36. Moraal, H., Belov, A., and Clem, J. M.: 2000, 'Design and Coordination of Multi-station International Neutron Monitor Networks', Space Sci. Rev., this volume.Google Scholar
  37. Nagashima, K., Sakakibara, S., and Murakami, K.: 1989, 'Response and Yield Functions of Neutron Monitor, Galactic Cosmic Ray Spectrum and its SolarModulation, Derived from all the Available World-Wide Surveys', Nuovo Cimento 12C, 173.ADSGoogle Scholar
  38. Pyle, R, Evenson, P., Bieber, J. W., Clem, J. M., Humble, J. E., and Duldig, M. L.: 1999, 'The Use of 3He Tubes in a Neutron Monitor Latitude Survey', Proc. of the 26th Int. Cosmic Ray Conf., Salt Lake City 7, 386.Google Scholar
  39. Rao, U.R., McCraken, K. G., and D. Venkatesan: 1963, 'Asymptotic Cones of Acceptance and Their Use in the Study of the Daily Variation of Cosmic Radiation', J. Geophys. Res. 68, 345.ADSCrossRefGoogle Scholar
  40. Raubenheimer, B. and Stoker, P.: 1974, 'Various Aspects of the Attenuation Coeficient of a Neutron Monitor', J. Geophys. Res. 79, 5069.ADSCrossRefGoogle Scholar
  41. Raubenheimer, B. and Flückiger, E.: 1977, 'Response Functions of a Modified NM-64 Neutron Monitor', Proc. 15th Int. Cosmic Ray Conf., Plovdiv 4, 151.Google Scholar
  42. Raubenheimer, B., Flückiger, E., Mischke, C., and Potgieter, M.: 1980, 'Comparison Between the Experimental and Theoretical Responses of Neutron Monitors', S. Afr. J. Phys. 3, 29.Google Scholar
  43. Raubenheimer, B., Van Niekerk, F., and Potgieter, M.: 1981, 'The Calculation of Differential Response Functions From Latitude Surveys. I: Theory', Proc. 17th Int. Cosmic Ray Conf., Paris 4, 321.Google Scholar
  44. Rossi, B.: 1948, 'Interpretation of Cosmic Phenomena', Rev. Modern Phys. 20, No 3.Google Scholar
  45. Ryan, J. M., Lockwood, J. A., and Debrunner, H.: 2000, 'Solar Energetic Particles', Space Sci. Rev., this volume.Google Scholar
  46. Sandström, A. E.: 1958, 'Cosmic Ray Soft Component Measurements During a Flight from Scandinavia Across the North Pole and Around Asia and Europe', Suppl. Nuovo Cimento VIII, 363.Google Scholar
  47. Seo, E., Ormes, J. F., Streitmatter, R. E., Stochij, S. J., Jones, W. V. Stephens, S. A., and Bowen, T.: 1991, 'Measurement of Galactic Cosmic Ray Proton and Helium Spectra During the 1987 Solar Minimum', Astrophys. J. 378, 763.CrossRefADSGoogle Scholar
  48. Shen, M.:, 1968, 'Neutron Production in Lead and Energy Response of Neutron Monitor', Suppl. Nuovo Cimento VI, 1177.Google Scholar
  49. Simpson, J.: 1948, 'The Latitude Dependence of Neutron Densities in the Atmosphere as a Function of Altitude', Phys. Rev. 73, 1389.CrossRefADSGoogle Scholar
  50. Shibata, S.: 1994, 'Propagation of Solar Neutrons Through the Atmosphere of the Earth', J. Geophys. Res. 99, 6651.CrossRefADSGoogle Scholar
  51. Shibata, S., Munakata, Y., Tatsuoka, R., Muraki, Y., Matsubara, Y., Sakakibara, Koi, T., Sako, T., Okada, A., Murata, T., Imaida, I., Tsuchiya, H., Ishida, Y., Sakai, H., Wakasa, T., Nonaka, T., Ohnishi, T., and Hatanaka, K.: 1997, 'Calibration of Neutron Monitor using an Accelerator', Proc. 25th Int. Cosmic Ray Conf., Durban 1, 45.Google Scholar
  52. Shibata, S., Munakata, Y., Tatsuoka, R., Muraki, Y., Matsubara, Y., Masuda, K., Koi, T., Sako, T., Okada, A., Murata, T., Tsuchiya, H., Imaida, I., Hoshida, T., Kato, Y., Yuki, A., Ohno, S., Hatanaka, K., Wakasa, T., Sakai, H., Nonaka, T., Ohnishi, T., and Ishida, Y.: 1999, 'Calibration of Neutron Monitor Using Accelerator Neutron Beam', Proc. of the 26th Int. Cosmic Ray Conf., Salt Lake City 7, 313.Google Scholar
  53. Smart, D.: 2000, 'Cutoff Rigidites in the Geomagnetic Field', Space Sci. Rev., this volume.Google Scholar
  54. Stoker, P. H.: 1981, 'Primary Spectral Variations of Cosmic Rays Above 1 GeV', Proc. 17th Int. Cosmic Ray Conf., Paris 4, 193.Google Scholar
  55. Stoker, P. H.: 1995, 'Neutron Monitor Latitude Surveys, Response Functions and 22-Year Modulation', Proc. of the 24th Int. Cosmic Ray Conf., Rome 4, 1082.Google Scholar
  56. Stoker, P., Clem, J., Bieber, J. W., and Evenson, P.: 1997, 'Apparent Geomagnetic Cutoffs and the Cosmic Ray Anomaly in the Cape Town Region', Proc. 25th Int. Cosmic Ray Conf., Durban 2, 385.Google Scholar
  57. Stoker, P., Dorman, L., and Clem, J.: 2000, 'Neutron Monitor Design Improvements', Space Sci. Rev., this volume.Google Scholar
  58. Sullivan, J. D.: 1971, 'Geometrical Factor and Directional Response of Single and Multi-element Particle Telescopes', Nucl. Instr. Meth. 95, 5.CrossRefGoogle Scholar
  59. Swordy, S.: 1993, 'Cosmic Ray Observations Below 1014 eV (OG Rapporteur paper)', Proc. 24th Int. Cosmic Ray Conf., Calgary 5, 243.Google Scholar
  60. Villoresi, G., Iucci, N., Tyasto, M. I., Dorman, L. I., Re, F., Signoretti, F., Zangrilla, N., Cecchini, S., Parisi, M., Signorini, C., Danilova, O. A., and Ptitsyna, N. G.: 1997, 'Latitude Survey of Cosmic Ray Nucleonic Component (Italy-Antarctic, 1996–1997)', Proc. 25th Int. Cosmic Ray Conf., Durban 2, 421.Google Scholar
  61. Webber, W. R. and Quenby, J. J.: 1959, 'On the Deviation of Cosmic Ray Specific Yield Functions', Phil. Mag. 4, 654.CrossRefADSGoogle Scholar
  62. Yanke, V. G.: 1980, 'On the Theory of Geophysical Effects of Secondary Cosmic Radiation', Cand. Thesis, IZMIRAN, Moscow, 1980 (in Russian).Google Scholar
  63. Zombeck, M.: 1982, Handbook of Space Astronomy and Astrophysics, Cambridge University Press.Google Scholar

Copyright information

© Kluwer Academic Publishers 2000

Authors and Affiliations

  • John M. Clem
    • 1
  • Lev I. Dorman
    • 2
  1. 1.Bartol Research InstituteUniversity of DelawareNewarkU.S.A.
  2. 2.IZMIRANMoscowRussia

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