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Design of an Acceleration Gap for Brightness Enhancement in a Reactor-Based Slow Positron Beamline

100%
Kuzuya Y., Oshima N., Kinomura A., Yabuuchi A.
Acta Physica Polonica A
|
2017
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vol. 132
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issue 5
1620-1623
EN
Design of an acceleration gap using mesh electrodes of the brightness enhancement system for the slow positron beamline of Kyoto University research reactor was studied to improve the performance of brightness enhancement. The transmittance and the increase in the angular divergence of the beam resulting from acceleration with the mesh electrode were estimated by trajectory simulations. The effect of the increase in the beam emittance on the beam radius at the focus point was estimated based on the analytical solution of the beam envelope equation. Using the obtained beam transmittance and beam radius, the beam brightness after remoderation was evaluated. Then, the influence of the mesh electrode configuration on the brightness was investigated.
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Effects of Coherent Synchrotron Radiation in Bunch Compressor of TARLA

63%
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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