Global ETD Search

1	Vyhodnocení vlivu tvaru dýzy na tlak v dráze primárního svazku elektronů v uzavřené variantě komory diferenciálního čerpání pomocí CAE / Using Computer Aided Engineering for analysis of the ESEM differential chamber Čech, Vojtěch January 2011 (has links) The semestral project will focus on using Computer Aided Engineering for analysis of the ESEM differential chamber. The instruments used for the analysis, evaluation and scrutiny of the given issue will be the CAD and CAE systems (Computer Aided Design and Computer Aided Engineering).
2	Bose-Einstein Condensation: Building the Testbeds to Study Superfluidity Naik, Devang S. 11 September 2006 (has links) Since Feynman's realization of using quantum systems to investigate quantum dynamics, interest in creating controllable quantum systems to simulate condensed matter phenomenon has been high. With the realization of BECs in 1995, the realization of a relatively clean testbed for simulating some of these phenomenon became a reality. My PhD research has been an exploration of the production and use of Bose-Einstein Condensates for the study of superfluidity. The first 3 years have been spent in the actual building of a Na BEC apparatus. During this time, we’ve implemented a distinct technique to trap ultra cold Na atoms, i.e. the Optically Plugged Trap. In the process, we have shown how atoms in a linear trap can show spin metastability and thus maintain a nonequilibrium state for long periods of time. In studying the interaction of ultra-cold atoms with light, we have developed a technique to measure the velocity distribution of atoms using a standing optical wave (Bragg Spectroscopy). Alongside this, we have also created optical traps for atoms in which we can change to shape of the trap itself to probe different condensed matter systems. The eventual goal being the investigation of condensed matter physics, specifically superfluidity, using ultra-cold atoms. Time of flight imaging Absorptive imaging Ring dye laser Evaporative cooling Differential pumping Vacuum system Atomic beams MOT Zeeman slower Cold sodium Bose-Einstein condensation Optically plugged trap Linear trap Metastability Bragg spectroscopy Optical trap Magnetic trap Superfluidity Bose-Einstein condensation
3	Analýza nadzvukového proudění plynu v diferenciálně čerpané komoře elektronového mikroskopu / Analysis of the supersonic flow of gas in the differentially pumped chamber EREM Matloch, Roman January 2013 (has links) This work describes briefly electron microscopy issue and physical model of fluid flow. Then presented diploma thesis will be describing analysis and evaluation of the impact of supersonic flow on the pressure and density in the path of the primary electron beam in the differential pumping chamber. For analysis, evaluation and examination of the issue will be used CAD and CAE (Computer Aided Engineering) programs. At the same time it will be developed a methodology of calculation applicable to supersonic flow in the low pressure system at ANSYS CFX.

1

Page generated in 0.0879 seconds