High acceleration measurement system under radioactivity conditions
| Autor: | Aliana Cervera, Gerard |
|---|---|
| Přispěvatelé: | Butcher, Mark, Ferrer Ballester, Miquel, Universitat Politècnica de Catalunya. Departament de Resistència de Materials i Estructures a l'Enginyeria |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: | |
| Zdroj: | UPCommons. Portal del coneixement obert de la UPC Universitat Politècnica de Catalunya (UPC) |
| Popis: | In particle physics research centers like CERN, it is critical to monitor the movements of devices inside the particle accelerator. When a technical issue in the tunnel occurs, the particle beams with high kinetic energy are sent, via two detours in the main ring, to two mainly metal absorber blocks, the so-called beam dumps, in order to stop them. The massive kinetic energy deposited on these dumps can cause them to move. Accelerometers are one measurement device that can be used to monitor the acceleration and, indirectly, the position of the dumps. In this thesis, the mechanical structure of an interferometer-based inertial accelerometer with a flexible membrane has been designed. In order to reduce the accelerator beam kinetic energy, a helical movement occurs in the particle beams, it was therefore necessary to measure the acceleration in the three spatial axes so a three-axis accelerometer is considered. As part of the theoretical approach, it was needed to focus on the requirements provided and to analyze the deformation, stress, and vibration of the structure. To ensure its reliability and precision, FEM analysis using ANSYS 19.1 was used and crosschecked by hand. After the theoretical approach, those characteristics were ensured with different types of experimental tests, such as an impact or vibration test. As a conclusion, theoretical requisites of the accelerometer have been met, except the complete linearity of the frequency response. The non-accomplishment of this requirement may lead to some error on the higher frequency acceleration measurements |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|