Paper |
Title |
Page |
TUPAB042 |
Current Status of IPM Linac Control System |
1418 |
SUSPSIK084 |
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- S. Haghtalab, F. Abbasi
Shahid Beheshti University, Tehran, Iran
- S. Ahmadiannamin
ILSF, Tehran, Iran
- F. Ghasemi, M. Lamehi
IPM, Tehran, Iran
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This paper reports the progress of the control system for IPM 10 MeV accelerator. As an electron linac, it consists of beam injection acceleration tube, radio frequency production and transmission, target, diagnostics and control and safety. In support of this source, an EPICS-based integrated control system has been designed and being implemented from scratch to provide access to the critical control points and continues to grow to simplify operation of the system. In addition to a PLC-based machine protection component and IO interface, a CSS-based suite of control GUI monitors systems including Modulator and RF, Vacuum, Magnets, and electron gun. An overview of this system is presented in this article.
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DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-IPAC2017-TUPAB042
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MOPIK075 |
Design, Simulation and Compare of Flat Cathode Electron Guns with Spherical Cathode Electron Guns for Industrial Accelerators |
702 |
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- M. Nazari, F. Abbasi
Shahid Beheshti University, Tehran, Iran
- S. Ahmadiannamin
ILSF, Tehran, Iran
- F. Ghasemi
NSTRI, Tehran, Iran
- S. Haghtalab
IPM, Tehran, Iran
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In this article, electron guns with flat and spherical cathodes have been designed and simulated for industrial accelerators. After checking the different features of each cathode geometry, there has been discussed about optimum values of this features. The most important features in selecting the best cathode geometry for industrial accelerators are beam waist radius, beam waist position, current density and price. Finally after comparing the different features of both geometries with each other, suitable geometry was selected.
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DOI • |
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※ https://doi.org/10.18429/JACoW-IPAC2017-MOPIK075
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TUPIK055 |
Target Investigation Driven by a 10 MeV Electron Linac for Bremsstrahlung Production |
1819 |
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- M. Yarmohammadi Satri, M. Lamehi, H. Shaker
IPM, Tehran, Iran
- F. Ghasemi
NSTRI, Tehran, Iran
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IPM E-Linac is a 10 MeV electron linear accelerator presently under construction at Institute for Research in Fundamental Sciences (IPM). It will accelerate electron from 45 keV to 10 MeV along the 160 cm accelerating tube. One of the beam energy measurement devices is designed based on the production of bremsstrahlung radiation. Target of the electron linac presents a key role in the production of bremsstrahlung. In this paper, we present the simulation results for an investigation on the bremsstrahlung radiation production based on target thickness, radius and atomic number, Z. We have applied Fluka Monte Carlo code for collecting the dose equiva-lent of generated bremsstrahlung along the target central axis at 30cm located downstream the target.
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DOI • |
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※ https://doi.org/10.18429/JACoW-IPAC2017-TUPIK055
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THPVA086 |
Beam Dynamics Studies of an Accelerating Tube for 6 MeV Electron LINAC |
4657 |
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- S. Zarei
Nuclear Science and Technology Research, InstituteRadiation Application School, Tehran, Iran
- F. Abbasi
Shahid Beheshti University, Tehran, Iran
- S. Ahmadiannamin
ILSF, Tehran, Iran
- F. Ghasemi
NSTRI, Tehran, Iran
- M. Lamehi
IPM, Tehran, Iran
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Side coupled standing wave accelerating tubes are widely used in a low energy linear accelerator because of relatively high accelerating gradient and low sensitivity to construction tolerances. The effective interaction of particles and electromagnetic fields is important for accelerate electrons to intended energy with the greatest efficiency and beam quality output. In this paper, we present the beam dynamics of a 6 MeV Side coupled standing wave accelerating tube using a space charge tracking algorithm (ASTRA). The designed accelerating tube that feeds by a maximum power of 2.6 MW resonant at frequency of 2998.5 MHz in pi/2 mode. 37.5 percent capture efficiency, 6.82 pi-mm-mrad horizontal emittance, 6.78 pi-mm-mrad vertical emittance, 2.24 mm horizontal and vertical beam size and 1079 keV energy spread of the output beam have been determined from the results of beam dynamics studies in ASTRA
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DOI • |
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※ https://doi.org/10.18429/JACoW-IPAC2017-THPVA086
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THPVA087 |
Thermal and Mechanical Analysis of 3 GHz Side Coupled RF Cavity for Medical Linacs |
4660 |
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- M. Mohseni Kejani, F. Abbasi
Shahid Beheshti University, Tehran, Iran
- S. Ahmadiannamin
ILSF, Tehran, Iran
- F. Ghasemi
NSTRI, Tehran, Iran
- S. Zarei
Nuclear Science and Technology Research, InstituteRadiation Application School, Tehran, Iran
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Medical linear accelerators have wide applications for cancer treatment in the world. Side coupled RF cavities was used in this accelerators for production of X-ray in range of energies between 4 to 25 MeV. Usually, the RF source is magnetron with lower cost in comparison to klystron in this type of applications. Side coupled cavity is a biperiodic structure with sensitive performance to operational thermal and mechanical conditions. In this paper, thermal and mechanical simulations for a period of the structure are presented.
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※ https://doi.org/10.18429/JACoW-IPAC2017-THPVA087
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THPVA088 |
DESIGN AND CONSTRUCTION OF BRAZED SIDE COUPLED CAVITY OF MEDICAL ACCELERATOR |
4664 |
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- S. Ahmadiannamin, Kh.S. Sarhadi
ILSF, Tehran, Iran
- F. Abbasi, M. Mohseni Kejani
Shahid Beheshti University, Tehran, Iran
- M. Bahrami, M. Lamehi
IPM, Tehran, Iran
- F. Ghasemi
NSTRI, Tehran, Iran
- S. Zarei
Nuclear Science and Technology Research, InstituteRadiation Application School, Tehran, Iran
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Two types of standing wave RF cavities are used routinely in construction of medical linear accelerators. These two types are Side coupled and on-axis coupled standing wave cavities. This selection is based on higher shunt impedance and compactness in comparison to travelling wave RF cavities. In this paper, we present the simulation, construction and measurement results of brazed section of 3 GHz side coupled RF cavity. It is the first successful experience of its kind in Iran. The obtained experiences can be used effectively for construction of side coupled thermionic RF guns and RF cavities of medical or industrial linacs.
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DOI • |
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※ https://doi.org/10.18429/JACoW-IPAC2017-THPVA088
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THPVA089 |
Optimization Study on Production of Mo-99 Using High Power Electron Accelerator Linac |
4667 |
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- A. Taghibi Khotbeh-Sara, F. Rahmani
KNTU, Tehran, Iran
- S. Ahmadiannamin
ILSF, Tehran, Iran
- F. Ghasemi
NSTRI, Tehran, Iran
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Molybdenum-99 is used for preparing 99mTc, which is the most widely used isotope in nuclear medicine. As a recent and now shortages in reactor-based supplies of 99Mo/99mTc and also some problems due to the time limitation in a direct production approach such as 100Mo(p, 2n)99mTc reaction by cyclotrons, many of developed countries have started the plan to produce this type of radioisotopes based on the production of non-reactor methods, especially by linac. In this study, the investigation on 99Mo production based on high power electron linac as an alternative approach has been performed, in which the use of 100Mo(gamma, n)99Mo (photoneutron production) has been proposed.
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DOI • |
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※ https://doi.org/10.18429/JACoW-IPAC2017-THPVA089
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TUPAB043 |
Design and Simulation of Voltage Multiplier Column of a 300keV, 10mAParallel Fed Cockcroft Walton Electron Accelerator for Industrial Applications |
1421 |
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- M. Nazari, F. Abbasi Davani, F. Ghasemi
Shahid Beheshti University, Tehran, Iran
- S. Ahmadiannamin
ILSF, Tehran, Iran
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In this article a 300keV, 10mA multiplier column has been designed for a parallel fed Cockcroft Walton electron accelerator for industrial applications. The parallel fed Cockcroft Walton multiplier is a capacitive coupling multiplier with diode rectification which can convert an input RF voltage to a low ripple output DC voltage. In this research tried to get a low ripple (300keV output) dc voltage. At first, the voltage multiplier column has been simulated with pspice simulation software. After doing the pspice simulations, optimum value of different parameters has been get. At the end we try to get the optimum values of pspice simulations with a mechanical design with CST STODIO. The mechanical design of voltage multiplier and its equivalent circuit hah a good accordance with each other.
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DOI • |
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※ https://doi.org/10.18429/JACoW-IPAC2017-TUPAB043
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TUPAB044 |
SIMULATION, MEASUREMENT AND TUNING OF A PROTOTYPE DISK LOADED RF CAVITY |
1424 |
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- S. Ahmadiannamin
ILSF, Tehran, Iran
- F. Abbasi, F. Ghasemi
Shahid Beheshti University, Tehran, Iran
- M. Lamehi, M. Shirshekan
IPM, Tehran, Iran
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Constant impedance accelerator RF cavities are constructed from similar resonator cells that stacked to each other. Best operation condition is achieved when all of cells resonate in one resonance frequency with similar quality factors. So, measurement and tuning of RF cavities is the critical step for final best operation of linear accelerators. In this paper, the electromagnetic computer simulations, RF measurement and final tuning of a nine cell periodic accelerator structure was represented. All of cavities tuned in one resonant frequency and according to theoretical concepts we obtain nine resonant modes from RF measurements by vector network analyzer.
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reference for this paper
※ https://doi.org/10.18429/JACoW-IPAC2017-TUPAB044
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