On the Emittance dependence on anode morphology of laser induced ion beams

Plasma Physics by Laser and Applications 2013 Conference

Velardi, L.^1 ; Delle Side, D.^1 ; Nassisi, V.^1

LEAS Laboratorio, Dipartimento di Matematica e Fisica, Universitá Del Salento, Italy^1

关键词: A-plane;    Accelerating voltages;    Emittances;    Excimers;    Geometric configurations;    Laser induced;    Laser ion sources;    Two gaps;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/508/1/012005/pdf
DOI  :  10.1088/1742-6596/508/1/012005

来源: IOP

【 摘 要 】

In this work, we studied the characteristics of ion beams generated by PLATONE accelerator in different anode configurations. The accelerator is a laser ion source with two gaps which accelerate the ions in cascade. The laser is an excimer KrF able to work at irradiances of 108-1010W/cm2. The target ablated was disk of Cu. The accelerating voltage applied in this work was 60 kV. The emittance evaluation was performed by the pepper pot method utilising radio-chromic films, EBT Gafchromic, as sensible targets. The study was performed by varying the geometric configuration of the anode (the extracting electrode), modifying the hole morphology. A plane and curved grids were mounted in order to change the extraction configuration. The results were compared with the ones obtained with the extraction hole without any grid. For the normalized emittance the lowest value found was 0.20 π mm mrad.