IranPAC2015

25 Nov 2015, 08:00 → 26 Nov 2015, 18:00 Asia/Tehran

سالن همایش‌ها (پژوهشگاه دانش‌های بنیادی)

دومین کنفرانس ملی شتابگرهای ذرات و کاربردهای آن

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Poster

• دریافت قالب پوستر (PPT)
• دریافت قالب پوستر (PPTX)
• دریافت قالب پوستر (PUB)
• راهنمای تهیه‌ی پوستر
• قالب پوستر

Wednesday 25 November

نام‌نویسی

نشست نخست

Convener: Prof. MohammadHadi Hadizadeh Yazdi (Ferdowsi University of Mashhad)

1 خوش‌آمد گویی – معرفی اهداف کنفرانس

Speaker: Dr Javad Rahighi (Iranian Light Source Facility)

2 آموزش در زمینه شتابگرها

Speaker: Dr Mohammad Lamehi Rachti (AEOI)

3 Example of frontier particle accelerator related activities at DESY

Speaker: Dr دلسیم هاشمی حسین

4 Radiobiology and Clinical New Issues in Current Hadron Therapy

Speaker: Dr Nicolae Verga

نصب پوسترها

10:30 پذیرایی

نشست دوم

Convener: Prof. Mahmoud Tabrizchi (Isfahan University of Technology)

5 معرفی طرح چشمه نور ایران

Speaker: Dr Javad Rahighi (Iranian Light Source Facility)

6 چالش‌های پیش رو در طراحی و ساخت چشمه‌های نوری با گسیلندگی کم

Speaker: Mr Morteza Jafarzadeh (Iranain Light Source Facility)

7 The role and importance of ILSF in the resistance economy

Get away from the oil-based economy and move to the resistance economy, is the new approach that is capable to provide the development of country in all-round of fields. Taking advantage of the knowledge-based economy is the most strategic tool in this direction. An economy in which the economic efficiency is provide by knowledge interplay on the knowledge, grater than the effect of knowledge on the raw materials. The development of knowledge-based economy, is related to social capital and is a sustainable process. The resistance economy as an economy which may determine the growth and prosperity of the country in the severe animosities, is not exclusive to the time of sanctions and war. The resistance economy is a long-term economic prospects which is possible only through innovative economy and knowledge-based production. In this article we have tried to review the concepts of the resistance and knowledge-based economies and by introduction of the Iranian Light Source Facilty (ILSF) and by saying its implementation necessity, explain the role and status of ILSF in achieving the resistance economic policies. ILSF as a science and technology infrastructure would provide the country's knowledge-based economic development. This infrastructure would be applicable in the most advanced studies and technology as well as engineering, sciences, biosciences and medicine to areas such as anthropology and archeology. The ILSF could play an important role in the science production and technology development which will bring sustainable economic growth.

Speaker: Mr Seyed Rahman Eghbali (ILSF, IPM & Imam Khomeini International University)

12:00 ناهار

نشست سوم

Convener: Prof. Seyed Rabi Mahdavi (Iran University of Medical Sciences)

8 Design and Simulation of magnetic bunch compressor (Alpha-Magnet) for IR-FEL

Production of short electron bunch has become one of the most important requirement to study the dynamics at the atomic level. Such a short electron bunch can also be used to produce intense coherent radiation in the far infrared free electron laser. one way of the production of short electron bunches at low energy is the combination of an rf gun with a thermionic cathode with a magnetic bunch compression (Alpha-magnet). In this paper, the Elegant simulation code has been used to optimize magnetic field gradient in order to have the shortest electron bunches. The 2D and 3D simulations of magnetic field were done by Poisson and CST, respectively and the results were compared with theoretical results. The results of the simulations were shown a consistency with other reported theoretical and experimental results. According to these results, the structure has a significant advantage in terms of consumption power and Enclosed space than current models.

Speaker: Mr javad jazini dorche (laser & plasma institude ,shahid beheshti university)

9 گزارش پیشرفت شتابدهنده 10 مگا الکترون ولت شورای عالی عتف

Speaker: Dr Hossein Afarideh (Amirkabir university of technology)

نمایش پوسترها

14:10 پذیرایی

مراسم افتتاحیه رسمی کنفرانس

Thursday 26 November

نشست چهارم

Convener: Prof. Mohammad Lamehi Rachti (AEOI)

10 Investigation of channeling radiation from diamond crystals to provide a mono energetic X ray at the ELEB electron linear accelerator

The measurements of channeling radiation (CR) at the radiation source ELBE of the Forschungszentrum Dresden-Rossendorf have been performed. The aim of performing these experiments was attempted for optimization of radiation yield and spectral line width in order to application CR in radiobiological researches. Diamond crystals can be used in relatively high electron currents due to the high Debye temperature and the large thermal conductivity. Measurements of (110) planar channeling radiation have been performed at electron energies of 14.6, 17, 30, and 34 MeV using diamond crystals of thickness 42.5, 102, 168, and 500 μm. These data results to install a X ray source at the radiation source ELBE. The electron beam with an average current of up to 200 μA allows toreach photon rates between 1010 s-1 and 1011 s-1 per 10% bandwidth .Photon energy can be tuned by changing the electron beam energy. Monochromisation of CR and bremsstrahlung background reduction has been investigated applying X-ray diffraction at a highly ordered graphite crystal.

Speaker: Dr Behnam Azadegan (Hakim Sabzevari University)

11 Designing an ultra low emittance lattices for Iranian Light Source Facility storage ring

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.

Speaker: Mr Esmaeil Ahmadi (Iranian Light Source Facility)

12 Electron acceleration by an asymmetric laser pulse

In this paper, electron acceleration in the field of laser pulse is investigated. To limit the interaction region which is required for acceleration, a new scheme is presented for injection of electron on temporal peak of the laser pulse. Electron is generated from a synchronized plasma source and is steered by magnetic field to the direction of laser pulse. Energy gain of electron is studied as function of laser parameters including initial phase and pulse duration and also electron velocity and injection angle.

Speaker: Dr Fazel Jahangiri (Laser and Plasma Research Institute, Shahid Beheshti university)

13 E-field measurement of TW-prototype accelerating tube

IPM’s S-band electron linear accelerator project has been defined in such a way that all its parts to be designed and built in Iran as possibly as they can. For more detailed evaluations and assurance, a cooper accelerating tube with the exact same specification of the main accelerating tube has also been constructed. After design and construction of prototype tube, cold test have been done by applying slater perturbation method in resonance mode and steel method in non resonance mode using an accurate Beadpull measurement system. Adaption of the electric field in different modes for the accelerating tube after the tune with simulation values shows the accuracy of the applied construction and mesurment methods.

Speaker: Dr farshad ghasemi (AEOI)

10:20 پذیرایی

نشست پنجم

Convener: Dr Rahman Eghbali

14 Analysis And Simulation Of Different Geometries Of Loop Coupler Of Electron Accelerator In The VHF Frequency Band

The different forms of loop coupler for coupling the input RF power to the acceleration cavity of electron accelerator at VHF frequency band was investigated. In this study, three forms of loop coupler considered and then by Comparison of simulation results using the CST software the best geometry is choice. Good coupling coefficient, position of coupler in the acceleration cavity and appropriate cooling system, as well as ease of construction are important knots in the design of selective coupler that have been considered. The results of this study show that for an electron accelerator in the VHF frequency band, such as ILU or RHODOTRON accelerator using a loop coupler with a rectangular loop is the best geometry.

Speaker: Mr ali mohammad poursaleh (aeoi)

15 شتابگر الکتروستاتیک الکترون سیصد کیلو الکترون ولت برای کاربردهای صنعتی: چالش‌ها و دستاوردها

Speaker: Dr OmidReza Kakuee (Nuclear Science & Technology Research Institute)

16 Matching of the H- Beam to the Low and Medium Energy Section of the Cern Linac4

Linac4 is the near future 160 MeV H- linear accelerator of the CERN presently under construction. It will replace the present 50 MeV proton Linac2 as injector of the proton accelerator complex and part of a project to upgrade the LHC injector. The Linac4 front-end, composed of a 45 keV ion source, a Low Energy Beam Transport (LEBT), a 352.2 MHz Radio Frequency Quadrupole (RFQ) which accelerates the beam to 3 MeV and a Medium Energy Beam Transport (MEBT) housing a beam chopper, has been installed and commissioned in the Linac4 tunnel. The LEBT is composed of two solenoids, a permanently installed diagnostic box; the MEBT is composed of three RF cavities and 11 quadrupole magnets to match the beam from the source to the RFQ and DTL, respectively. In this paper we present the beam matching process of the 45 keV H- beam to the RFQ and the accelerated 3 MeV beam to the DTL. The MEBT beam commissioning was complemented with the emittance measurement of the DTL matched beam taken with a temporary slit-and-grid emittance measurement device located after the MEBT line.

Speaker: Dr Masoomeh Yarmohammadi Satri (School of Particle and accelerators, IPM, Tehran, Iran)

17 Design and Construction of Gantry and Stationary Structure of Behyaar medical LINAC and Measuring Its Isocenter

To allow patients to be treated with beams from different directions, there is a need to be able to rotate the treatment head through 360º about the patient. The accelerator waveguide, microwave devices and the head assembly must be mounted on a gantry that enables the beam to be rotated around the patient. The design and manufacturing procedure of the mechanical system of the Behyaar medical LINAC has been completed in BehyaarSanaatSepahan Co. After construction and testing, encouraging results were achieved.

Speakers: Mr Ali Moradi (Behyaar Sanaat Sepahan co.), Mr Yasser Fakhari (Behyaar Sanaat Sepahan co.)

12:00 ناهار

ارتباط با صنعت

Convener: Dr farshad ghasemi (AEOI)

نشست ششم

Convener: Prof. Abbas Behjat (Yazd University)

18 The design of standing wave 6 MeV electron linear accelerator tube

Side-coupled standing wave tubes are widely used in the low energy electron linear accelerator, because of high accelerating gradient and low sensitivity to construction tolerances. The use of various simulation software for designing and optimization of the tube is very common nowadays. In this paper, SUPERFISH code and COMSOL are used for designing and optimization of the accelerating and coupling cavities for 6 MeV electron linear accelerator. Finite difference method in SUPERFISH and Finite element method in COMSOL are used to solve the equations. In this article, dimension of accelerating and coupling cavities and also coupling iris dimension are optimized to achieve resonance frequency of 2.9985 MHz and coupling constant of 0.0112. Using the results of this study and designing of the input coupling port subsequently, the construction of 6 MeV electron tube will be provided.

Speaker: Mrs sara zarei (AEOI)

19 Fabrication and Measurment of an X-Band LINAC Tube

Considering the challenges in fabrication and electromagnetic characterization of LINAC tube, first we have studied four major parameters including cavity material, dimension agreement, surface roughness and concentricity of cavities. Then considering the mentioned parameters and electromagnetic properties, cavities are fabricated. Afterwards, techniques and corresponding results for resonant frequency and quality factor are presented. In addition, plunger test is done by designing special fixtures for double checking the resonant frequency of each cavity. Finally the bead-pull test is accomplished after brazing the cavities together, to check the RF field profile and tuning.

Speakers: Mr Hossein Farhang (Electron Beam Applications Development Co.), Mr Mohammad Farahmandzad (Electron Beam Applications Development Co.)

20 effect of diffusion bonding along with brazing process on vacuum sealing strength of copper cavities in X-band linear accelerator and compare with diffusion bonding and brazing process

The most popular joining process in assembling metal parts for vacuum sealing is brazing, which is applicable to linear accelerators. However, in this application, overflow of molten filler alloy on the inner surface of cavity, will cause frequency shift of cavities. So, replacing the brazing process with diffusion bonding process, leads to an increase in cost, especially because of machining the mating surfaces. Therefore, in this study, the effect of diffusion bonding along with brazing process on vacuum sealing strength is investigated. Throughout this study, several test samples designed and made from oxygen-free electronic grade copper. Some samples joined under diffusion bonding and brazing process simultaneously, and compared with joined samples by diffusion bonding and brazing process alone, in term of microstructure, bonding strength and helium leak test. Finally, according to achieved results, all of copper cells of the X-band linear accelerator assembled and joined together.

Speaker: Mr majid yousefzade (electron beam application and developments co.)

21 Design of neutron bubble dosimeter for monitoring neutron dose in accelerator, radiotherapy and reactor sites

Purpose : Superheated liquid has recently been used extensively as a radiation detector, and its superiority as a neutron detector compared to other conventional neutron detector has already been established. The present work relates to a sensitive neutron dosimeter, a device for monitoring neutron dose in some accelerator, radiotherapy and reactor sites. Material and method: The dosimeters consist of two vials with 6cm inner diameter and 14.5cm height. Tens of thousands of 60µm droplets suspended in a glycerine-based gel when they vaporized the diameter of each droplet reach to 500 µm. The glass vial containing the superheated liquid (R-12, C-318) drop was placed on the top of piezoelectric transducer. Drop-nucleation was sensed by the piezoelectric transducer and the electric signal sent out of it was then amplified and fed to high pass filter and then a differentiators and a comparator to avoid the false bubble counting due to external noise. Dosimeter consists of micro-controller, temperature monitoring, pressure monitoring, battery monitoring, LCD display, keypad and a serial communication. The output of the temperature and pressure sensor is processed and fed to ADC of micro-controller for necessary corrections. Liquid Crystal Display (LCD) is used to display information of the neutron dosimeter like bubble count, neutron dose, neutron dose-rate, temperature, elapsed time etc. Conclusion : The important features of system are compact, lightweight, cost effective and high neutron sensitivity as compared to conventional neutron survey meters. This device is capable of measuring a neutron dose as small as 0.01 microSv using superheated liquid as a sensitive liquid. The response is zero sensitivity to gamma radiation and it can be used for fast and thermal neutron dosimetry in same time Key word: Superheated liquid, neutron, piezoelectric transducer, dosimeter

Speaker: Mr isaac shiri (dept.of Medical Physics, School of Medical Sciences, Iran University of Medical Sciences, Tehran, Iran)

نمایش پوسترها

16:00 پذیرایی

جمع‌بندی و مراسم اختتامیه