Wyniki wyszukiwania - BazTech

1

Design Study on Electron Energy Spread Effect on Performance of Linac Irradiation Facility with the Aid of Electron Energy Spectrum Online Analyzer

Bułka S., Zimek Z.

International Journal of Electronics and Telecommunications

|

2022

|

Vol. 68, No. 1

103--108

EN

Ongoing energy measurement is one of the parameters such as: electron beam current, transporter speed, or scanning width, that must be recorded according to the conditions imposed in the accelerator validation procedure. Described measurement method based on the use of a secondary electron collecting electrode has been tested at the electron beam linear accelerator installation typically used for radiation sterilization. Data processing and presentation of the electron beam characteristics is based on the information obtained via dedicated pulse acquisition interface. The energy spectra parameters provide data for modeling and calculation of dose distribution for irradiation process optimization and also knowledge of accelerator RF alignment in case of service.

2

Stabilizacja wybranych parametrów strumienia termoelektronów w gazowych źródłach jonów

Kuś D., Sikora J.

Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska

|

2012

|

nr 4a

15-17

PL

W pracy przedstawiono przegląd rozwiązań stosowanych w próżniomierzach jonizacyjnych i spektrometrach mas wykorzystujących strumień termoelektronów do jonizacji materii w postaci gazowej, w szczególności przykłady konstrukcji źródeł jonów oraz układów polaryzacji ich elektrod. Na podstawie wyników przeprowadzonej analizy zaproponowano nowy sposób detekcji prądu termoemisji elektronowej dla układów stabilizacji natężenia strumienia i energii elektronów.

EN

This paper presents an overview of the vacuum measurement instruments using electron - impact gas ion sources, especially examples of the ion sources and biasing systems. Based on the analysis results a new thermionic emission current detection method to implementation in stabilizer of ionizing beam intensity and electron energy has been proposed.

3

Investigation on the influence of the electron radiation on the appearance of fibers

Mohammadi K., Haghi A. K.

International Journal of Applied Mechanics and Engineering

|

2007

|

Vol. 12, no 3

875-877

EN

In this paper, the influences of electron radiation on the appearance of microwave-dried fibers were studied. Previously dried fibers with different properties are radiated by the electron beam of an electron microscope. Variable magnifications, processing time and voltage are applied. Using electron microscopy photographs, fibers inflations or deflations are measured precisely. It is observed that the electron energy can have significant effects on the fibers surface layer properties.

4

Specific heat of selected graphites used in calorimetry of electron beam and its influence on the accuracy of measurement of large dose

Panta P., Głuszewski W.

Nukleonika

|

2005

|

Vol. 50,suppl.2

55-57

EN

Calorimetry is applicable to both absolute calibration of routine dosimeters and absolute measurements of electron beam (EB) intensity (for industrial radiation processing). Advantages of graphite as the absorbing calorimetric material are a good heat capacity and negligible heat defect of this material. Knowledge of the specific heat capacities of the calorimetric core materials is fundamental in making absolute dose measurements. Two kinds of high-purity graphite used in calorimeters were analysed, i.e. Union Carbide grade AGOT and nuclear grade graphite [10]. There are some differences of specific heat of these graphites, up to 2% , which influence dosimetric response of calorimeters made of them.