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Investigation of Energy Deposition and Dose Distributions on Collimator under Photon Beam

100%
Demir N., Kuluöztürk Z., Akkurt İ.
|
EN
The bremsstrahlung photon facility where photon beam can be created via bremsstrahlung processes has been installed in many different accelerator in the world. TARLA (Turkish Accelerator and Radiation Laboratory at Ankara) will be first facility of TAC (Turkish Accelerator Center) project in Turkey. An optimal design of collimator is important for obtain a clean high energy photon beam in a bremsstrahlung facility. In this study the photon spectrum has been obtained depending on the entrance angle of the collimator. The energy deposition and dose distributions on the collimator by photon beam generated from 30 MeV energy electron beam have been calculated with FLUKA Monte Carlo simulation code.
2
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Superconducting Cavity Utilization for Linear Accelerator Systems

100%
Yildiz H., Cakir R., Porsuk D.
Acta Physica Polonica A
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2015
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vol. 128
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issue 2B
B-246-B-247
EN
Self amplified stimulated emission free electron laser production from electron energy above 1.5 GeV is studied to obtain 1-100 nm laser wavelength. Design simulations of linear accelerating system with gun and enjector system has been done in more detail by considering space charge effect for electron beam. Electromagnetic field for superconducting cavities, solenoid fields, cavity defects such as Higher Order Modes, Multipacting, Lorentz Force Detuning, and beam behaviour along the beamline are very important details for this study. Optimised cavity cell design layout are provided in order to obtain quality factor 10^9 for designed cavities throughout the main linear acceleration. To determine coupling factor, and zero modes and also other modes with relative errors are searched.
3
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Photoactivation Analysis of Mineral Trioxide Aggregate: Preliminary Results

100%
Eke C., Er K., Segebade C., Boztosun I.
Acta Physica Polonica A
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2017
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vol. 132
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issue 3
869-871
EN
The purpose of this study is to qualitatively analyse the elemental components of a mineral trioxide aggregate material using photoactivation. The material was irradiated for two hours using bremsstrahlung photons with an end-point energy of 18 MeV from a clinical electron linear accelerator. After irradiation the gamma-ray emission of the sample was counted by gamma spectrometry using a high-purity germanium (HPGe) detector. The gamma-ray spectra were analyzed by computer software. Major and trace elements were detected.
4
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Effects of Coherent Synchrotron Radiation in Bunch Compressor of TARLA

51%
Yildiz H., Aksoy A., Arikan P.
Acta Physica Polonica A
|
2016
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vol. 130
|
issue 1
214-216
EN
High order and non-linear effects in accelerator beamline play an important role in the transport of the beam. These effects cause variation of designed beam parameters such as emittance growth, bunch length variation, beam halo formation, etc. One of the known non-linear effects in bunch compressors is the coherent synchrotron radiation effect. In this study we focus on coherent synchrotron radiation effect in Turkish Accelerator and Radiation Laboratory in Ankara (TARLA) machine which is designed to drive Infrared Free Electron Laser, covering the range of 3-250 μm. We additionally discuss high order effects in bunch compressor of TARLA.
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