BOOK OF ABSTRACTS AND CONTRIBUTED PAPERS: International scientific conference Meeting on Operational and Research Capabilities for Better Understanding Solar-Terrestrial Interactions ,
Pages: 67-68,
https://doi.org/10.69646/aob250922
International scientific conference Meeting on Operational and Research Capabilities for Better Understanding Solar-Terrestrial Interactions
Published by: Scientific Society Isaac Newton

Since neutron monitors were first developed in the 1960s, their fundamental design principles have remained largely unchanged. However, in the past two decades, there has been increasing deployment of smaller, lighter versions of standard neutron monitors —mini-neutron monitors (MNMs). This paper pr esents a compact and cost -effective MNM deployed at Rozhen Observatory. We describe our new mini -neutron detector (MNM -ROZH), which utilizes gas -filled proportional counters (LND2043 BF₃). These detectors serve as effective cosmic ray monitors by measuring the secondary neutron flux produced by cosmic ray interactions in the atmosphere. We present the technical specifications of the MNM design, electronics systems, and software implementation, along with background measurements and initial results. The syst em is purposed for long -term cosmic ray monitoring and investigation of correlations between cosmic ray variations and solar activity.