Morteza Jafarzadeh - Academia.edu (original) (raw)
Papers by Morteza Jafarzadeh
Iranian Journal of Physics Research, 2017
The Iranian Light Source Facility (ILSF) booster main specifications including 250 ms ramp up, 2H... more The Iranian Light Source Facility (ILSF) booster main specifications including 250 ms ramp up, 2Hz repetition rate, and quasi-sinusoidal wave shape, up to this point have been the basis for calculations. Each family of magnets including Dipole, Quadrupole and Sextupoles will feed by individual power supply. In order to maintain constant transverse tunes and chromaticity while the beam is accelerated, quadrupole and sextupole magnet currents must closely track the current in the dipole magnets. In booster rings, feeding the high inductance load, tracking of Quadrupole and sextupole magnets, reducing output current fluctuation and having a precise high bandwidth current regulation system are particular challenges. In order to meet the requirements, it is necessary to have a fully digital controller to achieve a fast regulation system. The prototype power supply and its test results are described in this paper
A 3D industrial computed tomography (CT) manufactured based on a first generation CT systems, sin... more A 3D industrial computed tomography (CT) manufactured based on a first generation CT systems, single-source – single-detector, was evaluated. Operation accuracy assessment of the manufactured system was achieved using simulation in comparison with experimental tests. 137Cs and 60Co were used as a gamma source. Simulations were achieved using MCNP4C code. Experimental tests of 137Cs were in good agreement with the simulations
Electron storage rings are extensively used for high luminosity colliders, damping rings in high-... more Electron storage rings are extensively used for high luminosity colliders, damping rings in high-energy physics and synchrotron light sources. To further increase the luminosity at the colliders or brightness of a synchrotron light sources, the beam emittance is being continually pushed downward. In this paper, we investigate the lattice design for the storage ring of Iranian Light Source Facility (ILSF) with an ultra-low emittance, intermediate energy of 3 GeV and circumference of 528 m. We present the design results for a five-band achromat lattice with the natural emittance of 286 pm-rad. The base line is based on 20 straight sections with the length of 7 m.
Iranian light source facility is a new 3rd generation light source with a booster which is suppos... more Iranian light source facility is a new 3rd generation light source with a booster which is supposed to work at 150 keV injection energy and guide the electrons to a 3GeV ring. It consists of 50 combined dipole magnets in one type, 50 quadrupoles and 15 sextupoles in one family. Using POISSON and OPERA3D codes [1,2], pole and yoke geometry was designed for each magnet and also cooling and electrical calculations have been done. ILSF has attempted to mechanical design and build prototype magnets which are ongoing at this stage too. INTRODUCTION ILSF booster ring with the circumference of 504 m is supposed to work at injection energy of 150 keV and leads the electrons to the ring energy of 3 GeV and the horizontal emittance of 3 nm rad. Fifty combined bending magnets in one type are supposed to provide horizontal focusing and correct natural chromaticity in addition to their bending roles. There are also 50 pure quadrupole magnets for vertical focusing and 5 defocusing quadrupoles for ...
Spectromicroscopy (SM) beamline is planned to be one of the day one beamlines of the Iranian Ligh... more Spectromicroscopy (SM) beamline is planned to be one of the day one beamlines of the Iranian Light Source Facility project (ILSF) in the field of soft x-ray spectroscopy and microscopy [1]. It includes of two branches: PEEM and SPEM. Regarding user requirements such as high flux, small spot size, linear and circular polarization light, a helical undulator have been selected as a source for this beamline. This paper shortly shows source radiation calculations by theoretical formula and using SPECTRA code. INTRODUCTION Spectromicroscopy beamline is one of the day one beamlines of Iranian Light Source Facility that is devoted to the photoemission electron microscopy, x-ray magnetic circular dichroism as well as x-ray magnetic linear dichroism. Regarding these techniques, it is necessary to have linear and circular polarized light. Because of it, the helical undulator has been selected as a source of the beamline. In this paper, radiation properties of the source which have been calcula...
A control system has been designed for the commissioning of 10 MeV linear accelerator which is un... more A control system has been designed for the commissioning of 10 MeV linear accelerator which is under construction in institute for research in fundamental science (IPM). The IPM e-Linac is a traveling wave accelerator consisting of 62 components in five major sections: control and safety, beam injection, radio frequency production and transmission, acceleration tube and target. The existence of a central control system for controlling and monitoring all parts of the machine is necessary. The aim of the system design is to implement a fast and reliable control system which is easy to operate and extensible for future upgrades and improvements. For this purpose, EPICS has been chosen as the main environment due to high performance and distributed structure. In this system, Siemens PLC is used as EPICS IOC and graphical designs will performed by CSS and WinCC. In this study, first we present a brief description of the IPM electron linear accelerator, and then architecture of the contro...
In this article a diode electron gun is designed and simulated for a 1MeV parallel feed Cockcroft... more In this article a diode electron gun is designed and simulated for a 1MeV parallel feed Cockcroft-Walton accelerator for industrial applications. The pierce configuration is selected for focusing electrode. Simulations are carried out using CST Particle Studio. The gun is thermionic with indirect heating of spherical dispenser cathode and is made from porous tungsten which is impregnated with barium compounds. The required current in our accelerator is about 100 mA and this gun can easily provide it.
In this article accelerating tubes whit different geometries and different constructions are desi... more In this article accelerating tubes whit different geometries and different constructions are designed and simulated for a 1 MeV parallel feed Cockcroft-Walton electrostatic industrial accelerator. Simulations are carried out using CST Particle Studio. The accelerating tubes with different electrode geometries are designed and simulated and compared with each other. Finally whit respect to the comparisons the best geometry is selected. In this tube a 1 MV DC voltage is applied at several stages during the accelerating electrodes. Maximum electron beam current in the tube is 200 mA. In this application accelerating electrodes and focusing electrodes are stainless steel and insulators between electrodes are Borosilicate glass.
The Iranian Light Source Facility Project (ILSF) is a 3rd generation light source with energy of ... more The Iranian Light Source Facility Project (ILSF) is a 3rd generation light source with energy of 3 GeV, a full energy injector and a 150 MeV linac as pre-injector. The stored beam current in top up mode is 400 mA, the beam lifetime is about 7 h, and the average pressure of vacuum chamber is approximately 1.33 × 10 Pa (1 nTorr). The ILSF storage ring has been designed to be competitive in the future operation years. Some prototype accelerator components such as high power solid state radio frequency amplifiers, LLRF system, thermionic RF gun, storage ring H-type dipole and quadruple magnets, Hall probe system for magnetic measurement and highly stable magnet power supplies have been constructed in ILSF R&D laboratory. INTRODUCTION The construction of a synchrotron is an enterprise that requires international cooperation and very few countries are capable of carrying it out on their own. The synchrotron community is an international community with no borders and the synchrotron scient...
The Iranian Light Source Facility (ILSF) is a new 3 GeV synchrotron radiation laboratory in the d... more The Iranian Light Source Facility (ILSF) is a new 3 GeV synchrotron radiation laboratory in the design stage. The ILSF storage ring (SR) is based on a Five-Bend Achromat lattice providing an ultralow horizontal beam emittance of 0.48 nm-rad. The ring is consisting of 100 pure dipole magnets, 320 quadrupoles and 320 sextupoles. In this paper, we present some design features of the SR magnets and discuss the detailed physical and mechanical design of these electromagnets. The physical designs have been performed relying on two dimensional codes POISSON [1] and FEMM [2]. Three dimensional RADIA [3] and MERMAID [4] were practiced too, to audit chamfering values and get the desired magnetic length. INTRODUCTION The ILSF storage ring circumference is 528 m with 20 super periods which mechanical drawing is displayed in Fig. 1. Each super period is composed of 5 dipoles with the magnetic field of 0.748 T without any field gradient. Focusing is performed with the use of 16 quadrupoles groupe...
The Iranian Light Source Facility (ILSF) RF system, consisting of RF cavities, power sources and ... more The Iranian Light Source Facility (ILSF) RF system, consisting of RF cavities, power sources and low-level RF systems, is conceptually designed in accordance with the requirements of ILSF 3GeV storage ring. To achieve the desired 400mA beam current, utilization of the existing HOM-damped cavities is explored and RF system parameters are compared based on the usage of each cavity. Moreover, the choice of solid state amplifier as the RF power source is presented with its available power and structure. This paper, furthermore, explains the conceptual design and functionality of the selected digital LLRF system.
The Iranian Light Source Facility Project (ILSF) is a 3 GeV third generation light source with a ... more The Iranian Light Source Facility Project (ILSF) is a 3 GeV third generation light source with a current of 400 mA which will be built on a land of 50 hectares area in the city of Qazvin, located 150 km West of Tehran. The ILSF storage ring has been designed to be competitive in the future operation years. Some prototype accelerator components such as high power solid state radio frequency amplifiers, LLRF system, thermionic RF gun, storage ring H-type dipole and quadruple magnets, Hall probe system for magnetic measurement and highly stable magnet power supplies have been constructed in ILSF R&D laboratory.
Iranian Journal of Science and Technology, Transactions A: Science, 2018
Self-powered neutron detectors (SPNDs) are used widely in flux mapping, control, and protection o... more Self-powered neutron detectors (SPNDs) are used widely in flux mapping, control, and protection of nuclear reactors. Compared with other neutron detector, SPND has the advantages of small size, low cost, and relatively simple electronics. In this work, a prototype SPND for flux measuring neutron generators has been designed and tested. Using the Monte Carlo simulation code, the output current of the detector was calculated and compared with the experimental results. The agreement between the results suggests that this detector is capable of flux monitoring of the neutron generator. Then, a developed SPND has been introduced with the provision of producing higher output current.
The Iranian Light Source Facility Project (ILSF) is a 3rd generation light source with energy of ... more The Iranian Light Source Facility Project (ILSF) is a 3rd generation light source with energy of 3 GeV, a full energy injector and a 150 MeV linac as pre-injector. This is the first large scale accelerator which will be built in Iran. For storage ring, booster synchrotron and linac including the transfer lines, a draft design will be completed soon. The storage ring has an emittance of 3.3 nm-rad, a circumference of 297.6 meters with an overall of 32 straight sections of different lengths. The booster synchrotron has a circumference of 192 meters and emittance of 35nm-rad. For the booster synchrotron a new lattice is proposed. The linac is a conventional 150 MeV accelerator. The different accelerator components, magnets, girders, power supplies, vacuum systems etc are in the design phase. State of the art design for different components is employed through international collaboration.
Iranian Journal of Physics Research, 2017
The Iranian Light Source Facility (ILSF) booster main specifications including 250 ms ramp up, 2H... more The Iranian Light Source Facility (ILSF) booster main specifications including 250 ms ramp up, 2Hz repetition rate, and quasi-sinusoidal wave shape, up to this point have been the basis for calculations. Each family of magnets including Dipole, Quadrupole and Sextupoles will feed by individual power supply. In order to maintain constant transverse tunes and chromaticity while the beam is accelerated, quadrupole and sextupole magnet currents must closely track the current in the dipole magnets. In booster rings, feeding the high inductance load, tracking of Quadrupole and sextupole magnets, reducing output current fluctuation and having a precise high bandwidth current regulation system are particular challenges. In order to meet the requirements, it is necessary to have a fully digital controller to achieve a fast regulation system. The prototype power supply and its test results are described in this paper
A 3D industrial computed tomography (CT) manufactured based on a first generation CT systems, sin... more A 3D industrial computed tomography (CT) manufactured based on a first generation CT systems, single-source – single-detector, was evaluated. Operation accuracy assessment of the manufactured system was achieved using simulation in comparison with experimental tests. 137Cs and 60Co were used as a gamma source. Simulations were achieved using MCNP4C code. Experimental tests of 137Cs were in good agreement with the simulations
Electron storage rings are extensively used for high luminosity colliders, damping rings in high-... more Electron storage rings are extensively used for high luminosity colliders, damping rings in high-energy physics and synchrotron light sources. To further increase the luminosity at the colliders or brightness of a synchrotron light sources, the beam emittance is being continually pushed downward. In this paper, we investigate the lattice design for the storage ring of Iranian Light Source Facility (ILSF) with an ultra-low emittance, intermediate energy of 3 GeV and circumference of 528 m. We present the design results for a five-band achromat lattice with the natural emittance of 286 pm-rad. The base line is based on 20 straight sections with the length of 7 m.
Iranian light source facility is a new 3rd generation light source with a booster which is suppos... more Iranian light source facility is a new 3rd generation light source with a booster which is supposed to work at 150 keV injection energy and guide the electrons to a 3GeV ring. It consists of 50 combined dipole magnets in one type, 50 quadrupoles and 15 sextupoles in one family. Using POISSON and OPERA3D codes [1,2], pole and yoke geometry was designed for each magnet and also cooling and electrical calculations have been done. ILSF has attempted to mechanical design and build prototype magnets which are ongoing at this stage too. INTRODUCTION ILSF booster ring with the circumference of 504 m is supposed to work at injection energy of 150 keV and leads the electrons to the ring energy of 3 GeV and the horizontal emittance of 3 nm rad. Fifty combined bending magnets in one type are supposed to provide horizontal focusing and correct natural chromaticity in addition to their bending roles. There are also 50 pure quadrupole magnets for vertical focusing and 5 defocusing quadrupoles for ...
Spectromicroscopy (SM) beamline is planned to be one of the day one beamlines of the Iranian Ligh... more Spectromicroscopy (SM) beamline is planned to be one of the day one beamlines of the Iranian Light Source Facility project (ILSF) in the field of soft x-ray spectroscopy and microscopy [1]. It includes of two branches: PEEM and SPEM. Regarding user requirements such as high flux, small spot size, linear and circular polarization light, a helical undulator have been selected as a source for this beamline. This paper shortly shows source radiation calculations by theoretical formula and using SPECTRA code. INTRODUCTION Spectromicroscopy beamline is one of the day one beamlines of Iranian Light Source Facility that is devoted to the photoemission electron microscopy, x-ray magnetic circular dichroism as well as x-ray magnetic linear dichroism. Regarding these techniques, it is necessary to have linear and circular polarized light. Because of it, the helical undulator has been selected as a source of the beamline. In this paper, radiation properties of the source which have been calcula...
A control system has been designed for the commissioning of 10 MeV linear accelerator which is un... more A control system has been designed for the commissioning of 10 MeV linear accelerator which is under construction in institute for research in fundamental science (IPM). The IPM e-Linac is a traveling wave accelerator consisting of 62 components in five major sections: control and safety, beam injection, radio frequency production and transmission, acceleration tube and target. The existence of a central control system for controlling and monitoring all parts of the machine is necessary. The aim of the system design is to implement a fast and reliable control system which is easy to operate and extensible for future upgrades and improvements. For this purpose, EPICS has been chosen as the main environment due to high performance and distributed structure. In this system, Siemens PLC is used as EPICS IOC and graphical designs will performed by CSS and WinCC. In this study, first we present a brief description of the IPM electron linear accelerator, and then architecture of the contro...
In this article a diode electron gun is designed and simulated for a 1MeV parallel feed Cockcroft... more In this article a diode electron gun is designed and simulated for a 1MeV parallel feed Cockcroft-Walton accelerator for industrial applications. The pierce configuration is selected for focusing electrode. Simulations are carried out using CST Particle Studio. The gun is thermionic with indirect heating of spherical dispenser cathode and is made from porous tungsten which is impregnated with barium compounds. The required current in our accelerator is about 100 mA and this gun can easily provide it.
In this article accelerating tubes whit different geometries and different constructions are desi... more In this article accelerating tubes whit different geometries and different constructions are designed and simulated for a 1 MeV parallel feed Cockcroft-Walton electrostatic industrial accelerator. Simulations are carried out using CST Particle Studio. The accelerating tubes with different electrode geometries are designed and simulated and compared with each other. Finally whit respect to the comparisons the best geometry is selected. In this tube a 1 MV DC voltage is applied at several stages during the accelerating electrodes. Maximum electron beam current in the tube is 200 mA. In this application accelerating electrodes and focusing electrodes are stainless steel and insulators between electrodes are Borosilicate glass.
The Iranian Light Source Facility Project (ILSF) is a 3rd generation light source with energy of ... more The Iranian Light Source Facility Project (ILSF) is a 3rd generation light source with energy of 3 GeV, a full energy injector and a 150 MeV linac as pre-injector. The stored beam current in top up mode is 400 mA, the beam lifetime is about 7 h, and the average pressure of vacuum chamber is approximately 1.33 × 10 Pa (1 nTorr). The ILSF storage ring has been designed to be competitive in the future operation years. Some prototype accelerator components such as high power solid state radio frequency amplifiers, LLRF system, thermionic RF gun, storage ring H-type dipole and quadruple magnets, Hall probe system for magnetic measurement and highly stable magnet power supplies have been constructed in ILSF R&D laboratory. INTRODUCTION The construction of a synchrotron is an enterprise that requires international cooperation and very few countries are capable of carrying it out on their own. The synchrotron community is an international community with no borders and the synchrotron scient...
The Iranian Light Source Facility (ILSF) is a new 3 GeV synchrotron radiation laboratory in the d... more The Iranian Light Source Facility (ILSF) is a new 3 GeV synchrotron radiation laboratory in the design stage. The ILSF storage ring (SR) is based on a Five-Bend Achromat lattice providing an ultralow horizontal beam emittance of 0.48 nm-rad. The ring is consisting of 100 pure dipole magnets, 320 quadrupoles and 320 sextupoles. In this paper, we present some design features of the SR magnets and discuss the detailed physical and mechanical design of these electromagnets. The physical designs have been performed relying on two dimensional codes POISSON [1] and FEMM [2]. Three dimensional RADIA [3] and MERMAID [4] were practiced too, to audit chamfering values and get the desired magnetic length. INTRODUCTION The ILSF storage ring circumference is 528 m with 20 super periods which mechanical drawing is displayed in Fig. 1. Each super period is composed of 5 dipoles with the magnetic field of 0.748 T without any field gradient. Focusing is performed with the use of 16 quadrupoles groupe...
The Iranian Light Source Facility (ILSF) RF system, consisting of RF cavities, power sources and ... more The Iranian Light Source Facility (ILSF) RF system, consisting of RF cavities, power sources and low-level RF systems, is conceptually designed in accordance with the requirements of ILSF 3GeV storage ring. To achieve the desired 400mA beam current, utilization of the existing HOM-damped cavities is explored and RF system parameters are compared based on the usage of each cavity. Moreover, the choice of solid state amplifier as the RF power source is presented with its available power and structure. This paper, furthermore, explains the conceptual design and functionality of the selected digital LLRF system.
The Iranian Light Source Facility Project (ILSF) is a 3 GeV third generation light source with a ... more The Iranian Light Source Facility Project (ILSF) is a 3 GeV third generation light source with a current of 400 mA which will be built on a land of 50 hectares area in the city of Qazvin, located 150 km West of Tehran. The ILSF storage ring has been designed to be competitive in the future operation years. Some prototype accelerator components such as high power solid state radio frequency amplifiers, LLRF system, thermionic RF gun, storage ring H-type dipole and quadruple magnets, Hall probe system for magnetic measurement and highly stable magnet power supplies have been constructed in ILSF R&D laboratory.
Iranian Journal of Science and Technology, Transactions A: Science, 2018
Self-powered neutron detectors (SPNDs) are used widely in flux mapping, control, and protection o... more Self-powered neutron detectors (SPNDs) are used widely in flux mapping, control, and protection of nuclear reactors. Compared with other neutron detector, SPND has the advantages of small size, low cost, and relatively simple electronics. In this work, a prototype SPND for flux measuring neutron generators has been designed and tested. Using the Monte Carlo simulation code, the output current of the detector was calculated and compared with the experimental results. The agreement between the results suggests that this detector is capable of flux monitoring of the neutron generator. Then, a developed SPND has been introduced with the provision of producing higher output current.
The Iranian Light Source Facility Project (ILSF) is a 3rd generation light source with energy of ... more The Iranian Light Source Facility Project (ILSF) is a 3rd generation light source with energy of 3 GeV, a full energy injector and a 150 MeV linac as pre-injector. This is the first large scale accelerator which will be built in Iran. For storage ring, booster synchrotron and linac including the transfer lines, a draft design will be completed soon. The storage ring has an emittance of 3.3 nm-rad, a circumference of 297.6 meters with an overall of 32 straight sections of different lengths. The booster synchrotron has a circumference of 192 meters and emittance of 35nm-rad. For the booster synchrotron a new lattice is proposed. The linac is a conventional 150 MeV accelerator. The different accelerator components, magnets, girders, power supplies, vacuum systems etc are in the design phase. State of the art design for different components is employed through international collaboration.