Characterisation and optimisation of targets for plasma wakefield acceleration at SPARC_LAB

Costa G; Anania M P; Arjmand SBiagioni ADel Franco MDel Giorno MGalletti MFerrario MPellegrini DPompili RRomeo SRossi A RZigler ACianchi A

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Characterisation and optimisation of targets for plasma wakefield acceleration at SPARC_LAB

机译：Characterisation and optimisation of targets for plasma wakefield acceleration at SPARC_LAB

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Abstract One of the most important features of plasma-based accelerators is their compactness because plasma modules can have dimensions of the order of mm cm−1 , providing very high-accelerating fields up to hundreds of GV m−1 . The main challenge regarding this type of acceleration lies in controlling and characterising the plasma itself, which then determines its synchronisation with the particle beam to be accelerated in an external injection stage in the laser wakefield acceleration (LWFA) scheme. This issue has a major influence on the quality of the accelerated bunches. In this work, a complete characterisation and optimisation of plasma targets available at the SPARC_LAB laboratories is presented. Two plasma-based devices are considered: supersonic nozzles for experiments adopting the self-injection scheme of laser wakefield acceleration and plasma capillary discharge for both particle and laser-driven experiments. In the second case, a wide range of plasma channels, gas injection geometries and discharge voltages were extensively investigated as well as studies of the plasma plumes exiting the channels, to control the plasma density ramps. Plasma density measurements were carried out for all the different designed plasma channels using interferometric methods in the case of gas jets, spectroscopic methods in the case of capillaries.

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来源
《Plasma physics and controlled fusion》 |2022年第4期|共8页
作者
Costa G; Anania M P; Arjmand SBiagioni ADel Franco MDel Giorno MGalletti MFerrario MPellegrini DPompili RRomeo SRossi A RZigler ACianchi A;
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作者单位

Laboratori Nazionali di Frascati INFN;

INFN-MI;

Racah Institute of Physics, Hebrew UniversityUniversity of Rome Tor Vergata and INFN;

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原文格式 PDF
正文语种英语
中图分类等离子体物理学;
关键词
laser-plasma acceleration; plasma diagnostic; plasma generation;

Characterisation and optimisation of targets for plasma wakefield acceleration at SPARC_LAB

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