Document Type : Research Paper

Authors

• Dariush Rostamifard ¹
• Noushin Pishbin ²
• Ali Nasiri ³
• mir mohammad reza seyedhabashi ⁴
• maryam akbari nasaji ³

¹ Plasma and Nuclear Fusion Research Institute, Nuclear Science and Technology Research Institute (NSTRI),P.O.BOX: 14395-836, Tehran, Iran

² Plasma and Nuclear Fusion Research School, Nuclear Science and Technology Research Institute, AEOI,Tehran-Iran

³ Plasma and Nuclear Fusion Research Institute, Nuclear Science and Technology Research Institute (NSTRI),P.O.BOX: 14395-836, Tehran, Iran.

⁴ Plasma Physics and Nuclear Fusion Research School, Nuclear Science and Technology Research Institute (NSTRI), Atomic Energy Organisation of Iran (AEOI), P.O. Box: 14399-51113, Tehran, Iran

Abstract

In studying the interaction of hydrogen ions emitted from the plasma focus device on the selected materials for the first wall of the tokamak, characterizing the ion beam is very important. For this purpose, a Faraday-Cup detector was designed and built for MTPF plasma focus device and its electrical parameters were extracted. Two peaks can be seen in the signals obtained from the Faraday-Cup, the first peak is related to the radiation impact and the second peak is due to the impact of the hydrogen ion beam on the graphite electrode of the Faraday-Cup. By using the time of flight (TOF) method, the average energy of the hydrogen ion beam was 46 keV, as well as the flux parameters of the beam were 4.8×1027 ions.m-2.s-1 and 2.5×1019 ions.m-2, respectively. The specifications of the MTPF plasma focus device are embedded in the Lee model code and the code results for the ion beam specifications are in good agreement with the experimental results obtained from the Faraday cup signal. Also, other characteristics of hydrogen ion beam were also extracted.

Keywords

• Faraday-Cup
• time of flight (TOF) method
• Flux and fluence ion beam
• Lee model code