Speaker:

Mr. Habib Abdurrahman Arebu

The objective of experimental nuclear astrophysics is to provide information on the nuclear processes involved in astrophysical scenarios at the relevant energy range. However, the measurement of the cross section of nuclear reactions at low energies present a big hurdle due to the very low reaction rates often overwhelmed by the background radiation . A lot of approaches have been proposed and exploited to overcome such hard obstacles: in such frame, the idea to install a low energy - high intensity ion accelerator deep underground, to gain high luminosity while reducing the cosmic ray background, brought more than 25 years ago, to the pilot LUNA experiment. LUNA stands for Laboratory for Underground Nuclear Astrophysics: in the cave under the Gran Sasso mountain (in Italy) first a 50 kV and then a 400 kV single-ended particle accelerator for protons and alphas were deployed and produced plenty of data mainly on nuclear reactions of the H-burning phase in Aymptotics  giant Brach Star(AGB). In these seminar what I would to present is that how effective  Nuclear cross section is measured in luna at gammow window  and provided consistency  with the theoreretical frame work of Nuclear cross section calculations.

Mr.  Habib Abdurahman  is a Msc student in the physics department. He did  his Bsc in  Electrical Engineering  at Bahir dar university , Ethiopia  and Msc in Electrical Engineering at Addis Ababa university in Ethiopia. He worked in Ethiopian Airlines  for  2 years  in  avionics systems engineering department for Boeing 737 MAX.  He  worked on Race engineering company in Ethiopia for 1 year and a half  in maintenance and overhaul department of the electric cars, 6 month in the grand Ethiopian renaissance dam(Nile Dam) in the electromechanical units department, 3 month  as research trainee at Ethiopian space science  and technology institute in heavy nuclei astrophysics department. Apart from his  previous electrical engineering degree and research area and work experience his  area of research interest is in  physics is  nuclear physics, particularly on radioative process on heavy nuclei.

 

Speaker:

Date: Monday, 27 February 2023

Time: 11:00 a.m.

Location: Bldg. 6/Room 125

Abstract:

Renewable and sustainable energy harvesting devices, such as wind power plants, hydropower plants, and solar cells, are essential due to their function to produce clean energy and overcome environmental sustainability issues. However, energy storage devices are also crucial parts of renewable energy sources. Batteries, fuel cells, and supercapacitors (SCs) are technologies to store energy nowadays. Although there are several limitations on the SCs compared to batteries, SCs exhibit attractive properties for specific applications. Researchers are attracted to the exploration of supercapacitors not only with the high-power density and long cycle performance but also high energy density, specific capacitance, and low production cost such that they become competitive in performance with other energy storage devices. Some innovative materials have been developed to obtain well-performing SCs. In this presentation, the fundamentals of SCs will be delivered. Also, some recent technologies related to SCs will be presented.