نتایج جستجو برای: electrostatic accelerator

تعداد نتایج: 41588  

2010
Steven J Steer Michel-Alexandre Cardin William J Nuttall Geoffrey T Parks Steven J. Steer William J. Nuttall Geoffrey T. Parks

Demonstrating the generation of electricity with Accelerator-Driven Subcritical Reactor (ADSR) technology will incur substantial financial risk both from traditional reactor construction uncertainties and new technology uncertainties such as the reliability of the accelerator system. The sensitivity of the economic value of ADSRs to the reliability of the accelerator system is assessed. The eco...

2002
Andrei Terebilo

This paper reports on MATLAB Channel Access (MCA) Toolbox – MATLAB [1] interface to EPICS Channel Access (CA) client library. We are developing the toolbox for SPEAR3 accelerator controls, but it is of general use for accelerator and experimental physics applications programming. It is packaged as a MATLAB toolbox to allow easy development of complex CA client applications entirely in MATLAB. T...

Journal: :iranian journal of radiation research 0
m. najafi department of bioengineering and medical physics, shahid beheshti university of medical sciences, p. o. box 14155-6446, tehran, iran mohammad reza deevband department of bioengineering and medical physics, shahid beheshti university of medical sciences, p. o. box 14155-6446, tehran, iran a.a. yousefi diba department of radiation oncology, hafte tir hospital, p. o. box 1886718136, tehran, iran a. amin moghaddam department of statistical, tarbiat-modares university, p. o. box 14115-111, tehran, iran

background: radiation therapy  uses high-energy radiation to kill cancer cells. photoneutron contamination and induced radioactivity of high energy therapeutic photon beams are considered as the main source of occupational exposure to radiation therapists who works with linear accelerators operating above 10 mv. materials and methods: the gamma dose rates were measured after termination of diff...

ژورنال: سنجش و ایمنی پرتو 2015

With the development of science and technology in the medical field and need more than ever to accuracy and quality of treatment has been causer increase different radiotherapy methods. Almost the past two decade’s intraoperative radiation therapy (IORT) as one of the new techniques used to treat cancer patients. One of the problems with this method is obtaining accurate dosimetry, becaus...

1999
A. Abramovich Y. Pinhasi Y. Yakover A. Gover J. S. Sokolowski M. Canter

Time}frequency study of oscillation build-up in an electrostatic accelerator free-electron laser (EA-FEL) oscillator is presented. The unique features of EA-FEL and its capacity to operate in a long pulse mode, enable observation and study of linear and non-linear processes taking place in the evolution of radiation in the EA-FEL oscillator. The experimental data recorded with the aid of a digi...

Journal: :iranian journal of medical physics 0
alireza kamali-asl assistant professor, radiation medicine dept., shahid beheshti university, tehran, iran amir-hossein batooli m.sc. student, radiation medicine dept., shahid beheshti university, tehran, iran sanaz harriri m.sc. student, radiation medicine dept., shahid beheshti university, tehran, iran fatemeh salman-rezaee m.sc. student, radiation medicine dept., shahid beheshti university, tehran, iran fatemeh shahmardan m.sc. student, radiation medicine dept., shahid beheshti university, tehran, iran leila yavari m.sc. student, radiation medicine dept., shahid beheshti university, tehran, iran

introduction: intensity modulated radiation therapy (imrt) is one of the cancer treatment methods. it is important to selectively aim at the target in this way, which can be performed using a multileaf collimator (mlc). materials and methods: in order to specifically irradiate the target volume in radiotherapy to reduce the patient absorbed dose, the use of multileaf collimator has been investi...

Journal: :iranian journal of medical physics 0
mona zolfaghari department of physics, faculty of science, k. n. t university of technology, tehran, iran mahmood sedaghatizadeh department of physics, faculty of science, k. n. t university of technology, tehran, iran

introduction electron linear accelerator (linac) can be used for neutron production in boron neutron capture therapy (bnct). bnct is an external radiotherapeutic method for the treatment of some cancers. in this study, varian 2300 c/d linac was simulated as an electron accelerator-based photoneutron source to provide a suitable neutron flux for bnct. materials and methods photoneutron sources w...

2001
Y. S. Cho

A 1MV Tandem Proton Accelerator is being developed for the industrial applications such as high-energy implantation and explosive detection. The proton accelerator consists of a 10mA negative hydrogen ion source, two Einzel lens, accelerating tubes, a gas stripper, a 1MV 30mA Cockroft-Walton high voltage power supply, vacuum pumping system, and a high pressure insulating gas system. The large c...

2001
S. Jha F. Sabrina B. Samuels M. Hassan

One of the most vexing questions facing researchers interest in the World Wide Web is how the performance of Web Server could be improved. In this paper we discuss the results of our investigation on potential of httpd accelerator (phhttpd) to improve web server performance. This paper presents comparative results for running the Web server with and without an accelerator, and measures the effe...

2015
K. Peach J. Cobb S. L. Sheehy H. Witte T. Yokoi

The status of PAMELA (Particle Accelerator for MEdical Applications) – an accelerator for proton and light ion therapy using a non-scaling FFAG (ns-FFAG) accelerator – is reviewed and discussed.

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