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Preeksingh Anan. Environmental effects on the neutron monitor yield function. Master's Degree(Physics). Mahidol University. : Mahidol University, 2008.
Environmental effects on the neutron monitor yield function
ผลกระทบทางสิ่งแวดล้อมต่อนิวตรอนมอนิเตอร์ฟังก์ชันเยียลด์
Name: Preeksingh Anan
LCSH:
Cosmic rays
LCSH:
Cosmic ray neutrons
-- Measurements
Abstract:
Neutron monitors are used to continuously record the cosmic ray intensity. The
counting rate of neutron monitors has been found to change due to environmental effects
such as snow or heavy rainfall around the neutron monitor station. Therefore the aim
of this study was to estimate such variations by performing Monte Carlo simulations
under different conditions. In this thesis FLUKA (Fluctuating Kascades) was used as a
computational package to simulate the transport and interactions of energetic particles.
To analyze environmental effects simulations of the Princess Sirindhorn Neutron Mon-
itor (PSNM), the first neutron monitor station in Thailand, were performed Then its
environment was adjusted and the counts per beam luminosity were determined. It was
found that the roof or water on the roof had an effect on the counts perbeam luminosity
at secondary energies below 10−2 GeV. Consequently, the expected secondary neutron
spectrum was applied at Doi Inthanon, a mountatin in northern Thailand, to calculate
the yield function. As expected, neutrons dominated the yield function followed by other
particles at approximately 1 % of the total yield function. Finally the count rates due to
secondary neutrons at PSNM in three different situations were simulated. The variations
were found to be minor for water on the roof or for a puddle of water near PSNM.
Mahidol University
Address:
NAKHONPATHOM
Email:
liwww@mahidol.ac.th
Name: Ruffolo David
Role:
Thesis Advisors
Created:
2008
Modified:
2553-06-21
Issued:
2010-06-21
วิทยานิพนธ์/Thesis
application/pdf
CallNumber:
TH P923e 2008
eng
DegreeName: Master of Science
Level: Master's Degree
Descipline: Physics
Grantor: Mahidol University
©copyrights Mahidol University
RightsAccess:
ใช้เวลา
-0.691065 วินาที
Preeksingh Anan
| Title | Contributor | Type |
|---|---|---|
| Environmental effects on the neutron monitor yield function
มหาวิทยาลัยมหิดล Preeksingh Anan | Ruffolo David | วิทยานิพนธ์/Thesis |
Ruffolo David
| Title | Creator | Type and Date Create |
|---|---|---|
| Solar neutron statistical concepts
มหาวิทยาลัยมหิดล Ruffolo David | Chanoknan Banglieng | วิทยานิพนธ์/Thesis |
| Environmental effects on the neutron monitor yield function
มหาวิทยาลัยมหิดล Ruffolo David | Preeksingh Anan | วิทยานิพนธ์/Thesis |
| Modeling of finite time shock acceleration
จุฬาลงกรณ์มหาวิทยาลัย ;Udomsilp Pinsook;Ruffolo David | Chanruangrit Channok | วิทยานิพนธ์/Thesis |
| Theoretical and computational approaches towards understanding the role of Pitch angle diffusion in the transport of energetic charged particles
มหาวิทยาลัยเทคโนโลยีพระจอมเกล้าพระนครเหนือ Moore Elvin J.;Snodin Andrew P.;Ruffolo David J. | Chanidaporn Pleumpreedaporn. | วิทยานิพนธ์/Thesis |