Comparative study of X-ray emission from plasma focus relative to different preionization schemes
- Авторлар: Ahmad S.1, Qayyum A.1, Hassan M.2, Zakaullah M.2
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Мекемелер:
- National Tokamak Fusion Program
- Department of Physics
- Шығарылым: Том 43, № 7 (2017)
- Беттер: 749-755
- Бөлім: Plasma Diagnostics
- URL: https://journals.rcsi.science/1063-780X/article/view/186555
- DOI: https://doi.org/10.1134/S1063780X17070017
- ID: 186555
Дәйексөз келтіру
Аннотация
A 2.7-kJ Mather-type plasma focus has been investigated for X-ray emission with preionization produced by an α-source, a β-source, and a shunt resistor. Time-resolved and time integrated measurements are carried out using a PIN-diode-based X-ray spectrometer and pinhole camera. The β-source (28Ni63) assisted preionization enhances the X-ray emission up to 25%, while preionization induced by depleted uranium (92U238) increases both Cu-Kα and total X-ray yield of about 100%. The preionization caused by the optimum shunt resistor enhances the Cu-Kα and total X-ray yield of about 53%. It is found that preionization also broadens the working pressure range for the high X-ray yield and improves the shot-to-shot reproducibility of the system. Pinhole images reveal that the X-ray emission from the anode tip is dominant owing to impact of electron bombardment, while the X-ray emission from hot spots is also visible.
Авторлар туралы
S. Ahmad
National Tokamak Fusion Program
Хат алмасуға жауапты Автор.
Email: sarfraz_phys@hotmail.com
Пәкістан, Islamabad
A. Qayyum
National Tokamak Fusion Program
Email: sarfraz_phys@hotmail.com
Пәкістан, Islamabad
M. Hassan
Department of Physics
Email: sarfraz_phys@hotmail.com
Пәкістан, Islamabad
M. Zakaullah
Department of Physics
Email: sarfraz_phys@hotmail.com
Пәкістан, Islamabad