Measurement of the particle number density in a pulsed flow gas cell with a second-harmonic interferometer

Year: 2018

Authors: Brandi F., Marsili P., Giammanco F., Syllà F., Gizzi L.A.

Autors Affiliation: Intense Laser Irradiation Laboratory (ILIL), Istituto Nazionale di Ottica (CNR-INO), Via Moruzzi 1, Pisa, 56124, Italy; Istituto Italiano di Tecnologia (IIT), Via Morego 30, Genova, 16163, Italy; Dipartimento di Fisica, Università Degli Studi di Pisa, Largo B. Pontecorvo 3, Pisa, 56127, Italy;
SourceLAB SAS, 86 rue de Paris, Orsay, 91400, France

Abstract: A high-sensitivity high-speed second-harmonic interferometer is used to monitor the particle number density inside a pulsed flow gas cell designed for laser wakefield acceleration. The interferometer can precisely follow the particle density temporal evolution therefore offering a practical way to control in real-time the target density during laser-plasma interaction. The presented results are relevant for the evaluation of density diagnostic tools for flow gas cells used as laser-plasma acceleration stages.

Conference title:

More Information: 26/11/2013. 0010983. No. 653782 EuPRAXIA. Istituto Italiano di Tecnologia, IIT. – FB and LG acknowledge the financial support from the European Unions Horizon 2020 research and innovation programme Grant Agreement No 653782 EuPRAXIA, and from the Istituto Italiano di Tecnologia (convenzione operativa IIT CNR-INO prot. n. 0010983, 26/11/2013).
KeyWords: interferometry; density diagnostics; laser-plasma acceleration