eCite Digital Repository

Latitude survey observations of neutron monitor multiplicity


Bieber, JW and Clem, JM and Duldig, ML and Evenson, PA and Humble, JE and Pyle, R, Latitude survey observations of neutron monitor multiplicity, Journal of Geophysical Research, 109, (A12) pp. A12106. ISSN 0148-0227 (2004) [Refereed Article]

DOI: doi:10.1029/2004JA010493


We have recently augmented the electronics for our neutron monitor (NM) latitude survey so as to record the elapsed time (δT) between detected neutrons in each proportional tube, in order to examine time correlations in the data as a function of cutoff rigidity and primary spectrum. We quantify the dependence of counting rate on dead time, with particular focus on the longer dead times that were once employed in FSU/Russian stations. Our observations show that monitor dead time has little influence on the observed depth of Forbush decreases, indicating that the cosmic ray spectral shape is little changed in the decrease. However, the use of a different dead time significantly alters the response of the monitor as a function of cutoff rigidity. In spite of the general success of our calculation in reproducing the data, unexplained discrepancies are still present. Copyright 2004 by the American Geophysical Union.

Item Details

Item Type:Refereed Article
Research Division:Physical Sciences
Research Group:Astronomical sciences
Research Field:High energy astrophysics and galactic cosmic rays
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the physical sciences
UTAS Author:Humble, JE (Dr John Humble)
ID Code:31080
Year Published:2004
Web of Science® Times Cited:24
Deposited By:Physics
Deposited On:2004-08-01
Last Modified:2011-11-07

Repository Staff Only: item control page