نتایج جستجو برای: electron ring accelerator

تعداد نتایج: 437542  

2008
G. H. Hoffstaetter M. Tigner Y. Xie

Cornell University is planning to build an EnergyRecovery Linac (ERL) X-ray facility. In this ERL design, a 5 GeV superconducting linear accelerator extends the CESR ring. Currently CESR is used for the Cornell High Energy Synchrotron Source (CHESS). The very small electron-beam emittances would produce an x-ray source that is significantly better than any existing storage-ring light source. Ho...

1997
P. Krejcik

Under abnormally poor vacuum conditions in the electron damping ring, described in a companion paper at this conference, an emittance blowup was observed related to a transverse instability. The instability was only observed with two bunches in the ring, and could not be seen with single bunch operation, even at the same total beam current as for the two bunches. Measurements of the transverse ...

2010
J. Sikora S. De Santis D. Munson

The experimental study of the electron cloud dynamics and mitigation techniques is one of the main objectives of the CESR Damping Ring Test Accelerator (Cesr-TA) program. Shielded pick-up buttons are a relatively simple diagnostic device for obtaining time-resolved information on the electron cloud density. They have been already successfully employed on the SPS at CERN [1], although with diffe...

2008
C. Bruni P. Balcou E. Cormier S. Montant M. C. Nadeau

The goal of this project is to develop a compact device which can produce an intense flux of monochromatic Xrays for medical applications. It is based on Compton back-scattering resulting from collisions between laser pulses and relativistic electron bunches. Intense laser beams can be obtained with a high gain Fabry-Perot cavity coupled with either a high average power fiber amplifier or a hig...

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...

احمدیان نمینی, ساسان, شاکر, حامد, عباسی دوانی, فریدون, قاسمی, فرشاد, لامعی رشتی, محمد,

One of the most commonly used types of accelerators is linear electron accelerator. There is a project is in progress in Institute for research in fundamental sciences (IPM) aiming to design and build such an accelerator. It is defined in such a way that all parts to be built in Iran as possibly as it can. In this paper, after a brief explanation of the components of an electron linear accelera...

2007
Pauli Kehayias

In 2008, it has been proposed to convert the Cornell Electron Storage Ring (CESR) into a test accelerator, called CesrTA, for the proposed International Linear Collider (ILC) damping rings. One of the effects to be studied in CesrTA is fast ion instability. An electron beam ionizes residual gas in the vacuum chamber, resulting in positive ions being trapped in the beam’s potential. Fast ion ins...

Journal: :journal of biomedical physics and engineering 0
m robatjazi tehran university of medical sciences k tanha bushehr university of medical sciences s r mahdavi iran university of medical sciences h r baghani shahid beheshti university h r mirzaei shahid beheshti university of medical sciences m mousavi tehran university of medical sciences

background: one of the main problems of dedicated iort accelerators is to determine dosimetric characteristics of the electron beams. monte carlo simulation of iort accelerator head and produced beam will be useful to improve the accuracy of beam dosimetry. materials and methods: liac accelerator head was modeled using the beamnrcmonte carlo simulation system. phase-space files were generated a...

1999
J. L. Harris R. Helm M. Harold M. J. Lee M. Matera R. Melen P. Morton R. McConnell J. M. Paterson J. L. Pellegrin J. Rees B. Richter A. Sabersky R. Scholl J. Voss H. Wiedemann P. Wilson M. Allen

The SLAC electron-positron colliding-beam project SPEAR was completed and stable colliding beams were achieved in April, 1972, after a construction period of approximately 20 months. Since that time, an active experimental high-energy physics program has begun in addition to a program of continued studies of accelerator physics. This paper discusses only the accelerator physics results as well ...

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