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

  • Ali Awais
  • Javaid Hussain
  • Muhammad Usman
  • Waheed Akram
  • Kashif Shahzad
  • Turab Ali
  • Ishaq Ahmad
  • Malik Maaza
Article
  • 68 Downloads

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.

Keywords

Pelletron accelerator Charge state distribution Stripper gas Terminal potential 

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Copyright information

© Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Chinese Nuclear Society, Science Press China and Springer Science+Business Media Singapore 2017

Authors and Affiliations

  • Ali Awais
    • 1
  • Javaid Hussain
    • 1
  • Muhammad Usman
    • 1
  • Waheed Akram
    • 1
  • Kashif Shahzad
    • 1
  • Turab Ali
    • 1
  • Ishaq Ahmad
    • 1
  • Malik Maaza
    • 2
    • 3
  1. 1.Experimental Physics LaboratoriesNational Centre for PhysicsIslamabadPakistan
  2. 2.UNESCO-UNISA Africa Chair in Nanosciences/Nanotechnology, College of Graduate StudiesUniversity of South AfricaPretoriaSouth Africa
  3. 3.Nanosciences African Network (NANOAFNET)iThemba LABS-National Research FoundationSomerset WestSouth Africa

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