Search for the solar neutrons using the Yangbajing neutron monitor and the neutron telescope during the 23rd solar cycle

Abstract

The geographical location of Yangbajing (latitude 30, 4300m above sea level) has advantages for the direct detection of the solar are neutron events. The Yangbajing neutron monitor and neutron telescope were established in 1998 October at Yangbajing under the China-Japan cooperation and be used for the observation of solar neutron events during the 23th solar cycle. On 28 November 1998 the Yangbajing neutron monitor recorded a 3.8 sigma excess that has time coincidence with the reported neutron event of the Yangbajing neutron telescope. The response of Yangbajing neutron monitor and neutron telescope on the solar particle event associated with theX17.2 class are at October 28, 2003 was researched too.

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