Study of X-ray emission from a low energy (2.3 kJ) plasma focus by W-insert at the anode tip

Author

Shafiq, M. ; Hussain, Shiraz ; Waheed, A. ; Zakaullah, M.

Author_Institution

Dept. of Phys., Quaid-i-Azam Univ., Islamabad, Pakistan

fYear

2003

fDate

8-9 Dec. 2003

Firstpage

495

Lastpage

497

Abstract

The X-ray emission from a low energy (2.3 kJ) Mather-type plasma focus operated with hydrogen filling is investigated. Specifically the X-ray emission in 5.0-9.0 keV and 13.0-25.0 keV energy range is studied by inserting a tungsten metallic disc at the copper tapered anode tip. Filtered pin diodes are used as time resolved X-ray detectors whereas a pinhole camera is employed for time integrated analysis. The X-ray flux from the focus region is observed measurable within the pressure range 0.25-3.5 mbar of hydrogen filling. The maximum emission in 4π-geometry is estimated as 3.43 ± 0.05 J and corresponding wall plug efficiency for X-ray generation is 0.15 %. The X-ray emission is found dominantly as a result of electron beam activity on the anode tip that is confirmed by the images recorded by the pinhole camera.

Keywords

X-ray detection; X-ray imaging; X-ray spectroscopy; anodes; copper; electron beams; p-i-n diodes; plasma focus; tungsten; 0.15 percent; 0.25 to 3.5 mbar; 13 to 25 keV; 2.3 kJ; 5 to 9 keV; Mather-type plasma focus; W-insert; X-ray emission; X-ray flux; X-ray generation; copper tapered anode tip; electron beam activity; filtered pin diodes; hydrogen filling; low energy plasma focus; pinhole camera; time integrated analysis; time resolved X-ray detectors; tungsten metallic disc; wall plug efficiencies; Anodes; Cameras; Copper; Energy resolution; Filling; Focusing; Hydrogen; Plasma x-ray sources; Tungsten; X-ray imaging;

fLanguage

English

Publisher

ieee

Conference_Titel

Multi Topic Conference, 2003. INMIC 2003. 7th International

Print_ISBN

0-7803-8183-1

Type

conf

DOI

10.1109/INMIC.2003.1416777

Filename

1416777