Dissertation > Excellent graduate degree dissertation topics show

The study of the hard X-ray photocathode

Author: ShiFuWen
Tutor: HouZuo
School: Northwestern University
Course: Optics
Keywords: Hard x-ray photoemission photocathode secondery electron emission quantum efficiency
CLC: O434.1
Type: Master's thesis
Year: 2001
Downloads: 77
Quote: 0
Read: Download Dissertation

Abstract


The basic process of the interaction between x-ray and matter is systematiclly analysised. The characteristic of the photoemission induced by x-ray is discussed.A simple and more straightforword, semianalytical model is extended in order to analysis the characteristic of electron transport and emission in transmission x-ray photocathode.The characteristic of electron transport and emission in transmission CsI(cesium iodide) photocathode is theoretically calculated. The transmission CsI photocathode have been invertigated experimentally.The theoretical model and experiment curves are in satisfactory agreement.The result reveal that the direction excitation of the secondaries by photoelectron and auger-electron is the dominant mechanism in the photoemission of CsI x-ray photocathode and the quantum efficiency of x-ray photocathode rest with the secondery electron emission of photocathode materials.The implication of this study is guide to the reaserch of the hard x-ray image intensifier.

Related Dissertations

  1. GaAlAs / GaAs photocathode assembly mechanism of material,TN304.2
  2. Material Structure Design and Fabrication Technique of GaN Ultraviolet Photocathode,TN23
  3. SWNT adsorption mechanism of aromatic amino acid cluster Synchrotron Radiation Research,TB383.1
  4. Fabricating High External Quantum Efficiency Photonic Crystal LED Using Holographic Method,O438.1
  5. Research and Utilization of Polarization Effects in GaN Based LED,TN312.8
  6. CCD Calibration of Solar X-EUV Imaging Telescope,TH751
  7. Research on Interface Technology of Humachine Cooperation Manipulator,TP241
  8. The Photoacid production of acid can be evaluated in the polymer film and application,TB383.2
  9. Phase and phase transitions in the two-dimensional interaction model,O469
  10. Preparation and Modification of Nanosized TiO2 Materials with Photocathodic Protection Effect,TB383.1
  11. Pb films on Si (111) substrate low-temperature growth of the electronic structure and quantum effects,O484
  12. HLS high brightness injector beam measurement system,TL503.3
  13. Research and Application on Iterative Algorithms for Image Reconstruction,TP391.41
  14. ALICE / PHOS readout unit PIN 's developed in the beam performance test,TN364.2
  15. Bragg reflector for high-brightness light-emitting diodes,TN312.8
  16. The Optical Time Domain Measurement by Using Photon Counting Technology,O413
  17. Design of High Light Extraction Efficiency Gallium Nitrogen (GaN) Based Light Emitting Diodes (LEDs) Chip,TN312.8
  18. Experimental Study on the Quantum Efficiency Calibration of Single Photon Detector in Telecom Band by Using All-fiber Source of Correlated Photon-pairs,O431.2
  19. Microlens array film OLED Application Research,TN312.8
  20. Study on the Applications of Hard X-ray Microscopy and Nano-CT in Cellular Imaging,TP391.41

CLC: > Mathematical sciences and chemical > Physics > Optics > X-ray,ultraviolet, infrared > X-ray
© 2012 www.DissertationTopic.Net  Mobile