نتایج جستجو برای: accelerator

تعداد نتایج: 16836  

جمهوری, ابوالفضل, جوکار, کاظم, حاصل طلب, سعید, خلفی, حسین, قاسمی, فرشاد, مرتضوی, مجتبی, موسوی, سیدخلیل, پورصالح, علی محمد,

In This paper we will introduce the process of design and manufacturing an electron accelerator with 10MeV energy and 100kW power as the first Iranian powerful industrial electron accelerator. This accelerator designed based on modeling of one of the most powerful industrial accelerator called Rhodotron. But the design of the accelerator in a way that can be localize by relying on domestic indu...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شهید بهشتی 1387

چکیده ندارد.

Journal: :the modares journal of electrical engineering 2007
abdolreza sepyani ehsanolah kabir farid behazin

many of the video processing algorithms cannot be implemented in real time on general computers, due to their computational complexity. for an efficient implementation, a custom hardware that can be reconfigured for the algorithm, is used. in this paper a new acceleration hardware based on fpga elements is proposed. this hardware can be adapted with the processing algorithm through fpga design ...

ژورنال: سنجش و ایمنی پرتو 2017

In this paper design and simulation of an optimized accelerator tube is presented for the production of light charged particles up to energy of 2 MeV. Geometry of the accelerator tube electrodes was simulated based on the Van De Graaff accelerator tubes of Atomic Energy Organization by SIMION 7.0, Virtual Device and SIMION Toolkit codes. In accelerator tube, the extracted ion beam from the ion ...

Journal: :iranian journal of medical physics 0
mohammad amin mosleh-shirazi physics unit, department of radiotherapy and oncology, namazi hospital, shiraz university of medical sciences, shiraz, iran 2- ionizing and non-ionizing radiation protection research center, school of paramedical sciences, shiraz university of medical sciences, shiraz, iran saeed rahimi department of medical physics and engineering, school of medicine, shiraz university of medical sciences, shiraz, iran student research committee, shiraz university of medical sciences, shiraz, iran sareh karbasi physics unit, department of radiotherapy and oncology, namazi hospital, shiraz university of medical sciences, shiraz, iran

introduction in this study, we aimed to assess the medium-term energy stability of a 6mv elekta compacttm linear accelerator. to the best of our knowledge, this is the first published article to evaluate this linear accelerator in terms of energy stability. as well as investigating the stability of the linear accelerator energy over a period of several weeks, the results will be useful for esti...

Journal: :physical chemistry research 2014
mahmoud tabrizchi hossein farrokhpour fateme abyar hajar azad maryam mirian

a time-of-flight mass spectrometer (tof-ms) developed in our laboratory at isfahan university of technology is described here. the tof-ms instrument uses laser as the ionization source which provides an opportunity to investigate the ions formed in laser ablation or desorption. the tof-ms has an ionization chamber containing an accelerator and an ion lens to focus the ions into a one meter line...

C. Chen, C. Xie, D. Jiang, D. Wang, H. Liu, H.L. Zhao, J. Chen, J. Shen, J. Zhang, X. Wang, Z. Bao, Z. Dai,

Background: This paper aimed to analyze the output constancy of a medical linear accelerator using PTW QUICKCHECKwebline and studied the sensitivity of the PTW QUICKCHECKwebline. Materials and Methods:  The paper statistically analyzed the output doses of 6 MV and 10 MV of photons and 6 MeV, 9 MeV, and 12 MeV of electrons from a medical linear accelerator measured before the daily treatment to ...

Journal: :iranian journal of medical physics 0
mohammad taghi bahreyni toossi professor, medical physics research center, bu-ali research institute, mashhad university of medical sciences, mashhad, iran mehdi momen nezhad ph.d., linear accelerator dept., imam reza hospital, mashhad university of medical sciences, mashhad, iran seyed mohammad hashemi m.sc., medical physics research center, mashhad university of medical sciences, mashhad, iran

introduction: in recent decades, several monte carlo codes have been introduced for research and medical applications. these methods provide both accurate and detailed calculation of particle transport from linear accelerators. the main drawback of monte carlo techniques is the extremely long computing time that is required in order to obtain a dose distribution with good statistical accuracy. ...

Journal: :iranian journal of radiation research 0
m. hajizadeh saffar medical physics department, mashhad university of medical sciences, mashhad, iran m.r. ghavamnasiri h. gholamhosseinian

background: in radiotherapy, wedge filters are used for optimizing the tumor dose distribution in patients. the attenuation in beam intensity due to the presence of wedge filter is compensated by means of a wedge factor measured at the central axis of the beam. the field size, depth and ssd dependence of wedge factor have been assessed for 9mv radiations of neptun pc linear accelerator. materia...

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