Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 2017, Vol. 28 ›› Issue (5): 64 doi: 10.1007/s41365-017-0211-1

• LOW ENERGY ACCELERATOR, RAY AND APPLICATIONS • Previous Articles     Next Articles

The charge state distribution of B, C, Si, Ni, Cu and Au ions on 5 MV pelletron accelerator

Ali Awais1 • Javaid Hussain1 • Muhammad Usman1 • Waheed Akram1 • Kashif Shahzad1 • Turab Ali1 • Ishaq Ahmad1 • Malik Maaza2,3   

  1. 1 Experimental Physics Laboratories, National Centre for Physics, Islamabad 44000, Pakistan
    2 UNESCO-UNISA Africa Chair in Nanosciences/ Nanotechnology, College of Graduate Studies, University of South Africa, Muckleneuk Ridge, PO Box 392, Pretoria, South Africa
    3 Nanosciences African Network (NANOAFNET), iThemba LABS-National Research Foundation, 1 Old Faure Road, PO Box 722, Somerset West, Western Cape Province 7129, South Africa
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Ali Awais, Javaid Hussain, Muhammad Usman, WaheedAkram, KashifShahzad, TurabAli, Ishaq Ahmad, Malik Maaza. The charge state distribution of B, C, Si, Ni, Cu and Au ions on 5 MV pelletron accelerator.Nuclear Science and Techniques, 2017, 28(5): 64     doi: 10.1007/s41365-017-0211-1
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Abstract:

Stripper gas and terminal potential play a key role for the charge state distribution in a tandem pelletron accelerator. The knowledge of this distribution is important for experiments performed on tandem accelerators. The charge state distribution of B, C, Si, Ni, Cu and Au beams is measured by using Ar as stripper gas, and terminal potential is varied from 0.3 to 3.0 MV on 5UDH-2 tandem pelletron accelerator installed at the National Centre for Physics, Islamabad. The individual charge state is measured after the switching magnet at 15 in high-energy portion. It is observed that the higher charge states are stable in the range of lower and middle atomic masses of periodic table, whereas higher atomic mass (Au) shows beam current instability in higher charge states. For carbon,
the charge distribution at 1.7 MV terminal potential by varying stripper gas pressure is also studied, which resulted in decreased overall transmission with good current value for higher charge states.

Key words: Pelletron accelerator, Charge state distribution, Stripper gas, Terminal potential