Our research focuses on cosmic rays and neutrino physics, emphasizing both experimental observations and detector development. We work on understanding the interaction of high-energy particles with the Earth's atmosphere and contribute to the advancement of detection technologies for cosmic-ray and neutrino studies.

Cosmic Ray Research

Our cosmic ray research covers ground-based observations, modulation studies, and detector development to investigate the influence of solar activity and space weather on cosmic ray behavior. Key areas include:

1. Cosmic Ray Modulation and Space Weather Impact

• Studying the long-term variation of cosmic ray intensity and its correlation with solar and interplanetary parameters, such as the interplanetary magnetic field (IMF), heliospheric current sheet (HCS) tilt angle, coronal mass ejections (CMEs), and solar wind speed.
• Analyzing solar cycle effects on cosmic rays, including the 11-year modulation and short-term disturbances caused by solar energetic particle (SEP) events.

2. Neutron Monitor Observations and Spectral Studies

• Conducting altitude-dependent and latitude survey studies to examine spectral variations of cosmic rays using neutron monitors at different cutoff rigidities.
• Investigating secondary cosmic ray cascades in the atmosphere through neutron monitor count rate analysis, linking observations to cosmic ray spectrum variations at different energy levels.

3. Development of Mobile Neutron Monitoring Systems

• Deploying mobile neutron detectors, such as Changvan, which has been used in polar expeditions and latitude surveys to measure cosmic ray intensity variations with geomagnetic latitude.
• Enhancing data acquisition and correction methods to improve cosmic ray measurement accuracy by accounting for pressure, precipitable water vapor (PWV), and other environmental factors.
• Integrating neutron monitor data into space weather forecasting models, aiding in radiation risk assessment for aviation and satellite operations.

Neutrino Research

We are actively involved in high-energy neutrino detection and the development of next-generation neutrino observatories, particularly through our contributions to the IceCube Neutrino Observatory and IceCube-Gen2. Our research includes:

1. Neutrino Detector Development and Instrumentation

• Leading the development of Long Optical Modules (LOMs) for IceCube-Gen2, with a focus on manufacturing electronic boards and assembling LOMs in Thailand before deployment at the South Pole.
• Collaborating with UW-Madison, Chiba University, and global partners to optimize the design and performance of optical sensors for deep-ice neutrino detection.