Graduate papers
  
Description of the graduate paper
Form of studies Professional Bachelor
Title of the study programm Medical Engineering and Physics
Title in original language UV fotoelektronu emisijas spektrometra parauga galdiņš ar mainīgo augstumu.
Title in English UV photoelectron emission spectrometer height changeable specimen table.
Department Faculty Of Civil And Mehanical Engineering
Scientific advisor Aleksejs Kataševs
Reviewer Edgars Kuks
Abstract Photoelectron spectrometer (PES) is the instrument that is used to measure the electron emission current from the surface of the material [1]. The measurements take place in vacuum chamber. The specimen under study is set in place by a table, the size of the table and the chamber often determine the size of the sample. The design of specimen table assembly of the custom design PES, placed at BINI lab, enables use of the specimens of maximal diameter 25mm and thickness 12 mm. The table assembly is based on the HeatWaveLab UHV button heater (model 101491 heat shield assembly), enabling heating of the specimen up to 1200°C, that is excessive for the routine operation of PES (heating up to 700°C is used). The specimen height position is adjusted for the different thickness of the specimen by manual shifting of the specimen table inside the support, that makes height adjustment time – consuming and inaccurate. To control the temperature of the sample, a thermocouple is attached to the surface of the table, that impedes accurate measurement of temperature at the sample’s surface, especially for thick dielectric samples.
Keywords UV PES
Keywords in English UV Photoelectron emission spectrometer
Language eng
Year 2023
Date and time of uploading 13.01.2023 20:46:51