RUPAC2012 - List of Authors (Feghhi, S.A.H.)

Paper	Title	Page
WEPPC001	A Simulation Study on Accelerator Cavities for a SW Linac	445
	N. Khosravi Zanjan University, Zanjan, Iran E.E. Ebrahimibasabi, S.A.H. Feghhi sbu, Tehran, Iran
	An on axis-coupled cavity structure has been studied using S-band microwaves at 2856 MHz, suitable for industrial and research applications. It uses a bi-periodic SW structure with constant impedance that operates at pi/2 mode. This structure consist Kidney-like shaped slots, placed symmetrically with respect to the accelerating axis. We compared Different shapes, places and sizes of slots with respect to coupling coefficient, resonance frequency and some of cavity parameters. Sensitivity analyses of accelerating cavity on details of structure have been done and their behavior, with respect to the resonance frequency has been presented. According to the simulation result using SUPERFISH and CST Studio package, each accelerating cavity is capable to deliver 0.56 MeV to electrons in a 50 mA beam.

WEPPC024	Design, Simulation and Optimization of a Solenoid for ES-200 Electrostatic Accelerator	498
	M. Asgarpour, E.E. Ebrahimibasabi, S.A.H. Feghhi, M. Khorsandi sbu, Tehran, Iran N. Khosravi Zanjan University, Zanjan, Iran
	Solenoids have important role in focusing the beam in drift tube of charge particle accelerators. In order to optimize the beam current in ES-200, an electrostatic proton accelerator at Shahid Beheshti University, design and simulation of a suitable solenoid has been performed. Using CST Studio package, simulation results has been validated in comparison with theoretical formula. According to the results we optimized the design using CST to have minimum beam current on drift tube.

WEPPD061	Design and Simulation of a New Faraday Cup for ES-200 Electrostatic Accelerator	682
	E.E. Ebrahimibasabi, S.A.H. Feghhi, M. Khorsandi sbu, Tehran, Iran
	Faraday Cups have been used as diagnostic tools to measure the charged particle beam current directly. Up to now, different designs have been introduced for this purpose. In this work a new design of Faraday Cup for ES-200 accelerator, a proton electrostatic accelerator which is installed at Shahid Beheshti University, has been performed. FC's dimensions and desirable material were considered Based on the ES-200 beam characteristics (maximum energy of 200 keV and maximum current of 500 mkA). Thickness and dimensions of FC has been calculated by SRIM code according to the range of proton and induced electrons. MCNPX Monte Carlo code was used in order to simulate the angular dispersion and flux of back scattered and secondary electrons that are produced in collision of energetic protons. The Appropriate FC geometry specifications have been calculated by using MCNPX code. Final Simulation and validation of the FC performance has been done by using CST Studio package. In addition, the heat power generated due to proton collision with FC has been calculated analytically and the required cooling system has been designed by ANSYS. Results showed that the new designed Faraday Cup has a good performance to measure the proton beam produced by ES-200 ion accelerator.

Paper

Title

Page

A Simulation Study on Accelerator Cavities for a SW Linac

445

N. Khosravi
Zanjan University, Zanjan, Iran
E.E. Ebrahimibasabi, S.A.H. Feghhi
sbu, Tehran, Iran

An on axis-coupled cavity structure has been studied using S-band microwaves at 2856 MHz, suitable for industrial and research applications. It uses a bi-periodic SW structure with constant impedance that operates at pi/2 mode. This structure consist Kidney-like shaped slots, placed symmetrically with respect to the accelerating axis. We compared Different shapes, places and sizes of slots with respect to coupling coefficient, resonance frequency and some of cavity parameters. Sensitivity analyses of accelerating cavity on details of structure have been done and their behavior, with respect to the resonance frequency has been presented. According to the simulation result using SUPERFISH and CST Studio package, each accelerating cavity is capable to deliver 0.56 MeV to electrons in a 50 mA beam.

WEPPC024

Design, Simulation and Optimization of a Solenoid for ES-200 Electrostatic Accelerator

498

M. Asgarpour, E.E. Ebrahimibasabi, S.A.H. Feghhi, M. Khorsandi
sbu, Tehran, Iran
N. Khosravi
Zanjan University, Zanjan, Iran

Solenoids have important role in focusing the beam in drift tube of charge particle accelerators. In order to optimize the beam current in ES-200, an electrostatic proton accelerator at Shahid Beheshti University, design and simulation of a suitable solenoid has been performed. Using CST Studio package, simulation results has been validated in comparison with theoretical formula. According to the results we optimized the design using CST to have minimum beam current on drift tube.

WEPPD061

Design and Simulation of a New Faraday Cup for ES-200 Electrostatic Accelerator

682

E.E. Ebrahimibasabi, S.A.H. Feghhi, M. Khorsandi
sbu, Tehran, Iran

Faraday Cups have been used as diagnostic tools to measure the charged particle beam current directly. Up to now, different designs have been introduced for this purpose. In this work a new design of Faraday Cup for ES-200 accelerator, a proton electrostatic accelerator which is installed at Shahid Beheshti University, has been performed. FC's dimensions and desirable material were considered Based on the ES-200 beam characteristics (maximum energy of 200 keV and maximum current of 500 mkA). Thickness and dimensions of FC has been calculated by SRIM code according to the range of proton and induced electrons. MCNPX Monte Carlo code was used in order to simulate the angular dispersion and flux of back scattered and secondary electrons that are produced in collision of energetic protons. The Appropriate FC geometry specifications have been calculated by using MCNPX code. Final Simulation and validation of the FC performance has been done by using CST Studio package. In addition, the heat power generated due to proton collision with FC has been calculated analytically and the required cooling system has been designed by ANSYS. Results showed that the new designed Faraday Cup has a good performance to measure the proton beam produced by ES-200 ion accelerator.