 หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Geometric Study of Relativistic Heavy Ion Collisions) ผู้เขียน: Roppon Picha สื่อสิ่งพิมพ์:pdf AbstractThis study discusses aspects regarding the geometry of high-energy heavy ion collisions in particle accelerators, from which a myriad of new particles are produced. Calculations of the number of participating nucleons and the number of collisions were made, using experimental parameters from existing literature. Three symmetric systems were investigated: copper (Cu-63), gold (Au-197) and lead (Pb-208), which are some of the main elements studied in the Relativistic Heavy Ion Collider (RHIC) and the Large Hadron Collider (LHC) particle accelerators. The calculations showed that as the energy of collision increased from RHIC to LHC energies, the number of collisions approximately doubled, largely due to the increased inelastic cross section. |
หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Designing a Transportable Neutron Radiography System) ผู้เขียน:Roppon Picha, Narut Simaroj, วิวัฒน์ แสงเพ็ชร สื่อสิ่งพิมพ์:pdf AbstractAspects of a neutron radiography setup, including the energy and geometry of the neutron source, the material choices and geometry of the moderation system, and the geometry of the imaging section and of the shielding system, via Monte Carlo methods are described. We evaluated the practicality of a transportable neutron radiography system. Calculations of neutron fluxes and energy distributions due to an americium-beryllium neutron source were performed using MCNP (Monte Carlo N-Particle) software package. The result shows that the safe source activity level is in the order of micro-Ci. This demonstrates the challenges in constructing a practical, efficient, and safe radiography system. |