Design and Development of a Chopper for Ion Beam Current Measurement and Monitoring

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SHAFIEI S.; LAMEHI RASHTI M.; Vosoughi Y.

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Journal Paper

Paper Information

Journal: JOURNAL OF NUCLEAR RESEARCH AND APPLICATIONS Year:2022 | Volume:2 | Issue:2 Page(s): 13-19

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Information Journal Paper

Title

Design and Development of a Chopper for Ion Beam Current Measurement and Monitoring

Author(s)

SHAFIEI S. | LAMEHI RASHTI M. | Vosoughi Y. | Issue Writer Certificate

Keywords

Ion Beam Analysis (IBA)

Beam chopper

Ion beam current measurement

Charge integration

Ion beam monitoring

Abstract

For the ion beam analysis of insulating materials, we have investigated the design and calibration of an ion beam chopper. The chopper consists of a holder, a chopper plate, four photo sensors, a stepper motor, and an electronic control unit. The chopper plate was designed based on sharing an equal fraction of the ion beam between the chopper and the target. The situation of the chopper to the ion beam is controllable by using four photo-sensors around it. The time intervals in which the material is analyzed and the number of incident ions measured are determined via gate pulses governed by the sensors’ signals. The ion beam current was measured by charge integration at the chopper plate. We calculated the charge correction factors to eliminate the contribution of secondary electrons to the measurements. The measurements were done via Rutherford backscattering spectroscopy (RBS) analysis of a thin Au layer deposited on Si wafer with helium and proton ions in the energy range of 1-2. 2 MeV with a precision of less than 5%. The charge correction factors are independent of the ion beam current.

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APA: Copy

SHAFIEI, S., LAMEHI RASHTI, M., & Vosoughi, Y.. (2022). Design and Development of a Chopper for Ion Beam Current Measurement and Monitoring. JOURNAL OF NUCLEAR RESEARCH AND APPLICATIONS, 2(2), 13-19. SID. https://sid.ir/paper/975223/en

Vancouver: Copy

SHAFIEI S., LAMEHI RASHTI M., Vosoughi Y.. Design and Development of a Chopper for Ion Beam Current Measurement and Monitoring. JOURNAL OF NUCLEAR RESEARCH AND APPLICATIONS[Internet]. 2022;2(2):13-19. Available from: https://sid.ir/paper/975223/en

IEEE: Copy

S. SHAFIEI, M. LAMEHI RASHTI, and Y. Vosoughi, “Design and Development of a Chopper for Ion Beam Current Measurement and Monitoring,” JOURNAL OF NUCLEAR RESEARCH AND APPLICATIONS, vol. 2, no. 2, pp. 13–19, 2022, [Online]. Available: https://sid.ir/paper/975223/en

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