Probing bulk electron temperature via x-ray emission in a solid density plasma

Ramakrishna, Bhuvanesh (2023) Probing bulk electron temperature via x-ray emission in a solid density plasma. Plasma Physics and Controlled Fusion, 65 (4). 045005. ISSN 0741-3335

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Abstract

Bulk electron temperatures are calculated for thin Cu targets irradiated by the petawatt class Vulcan laser, from the Kα yield obtained using highly oriented pyrolytic graphite crystals. Cu-Kα emission studies have been used to probe the bulk electron temperature. A 30-80 eV core temperature extends homogeneously over distances up to ten times the laser focal spot size. Energy shifting has been observed due to different ionization states produced for different temperatures in the plasma. Polarization dependencies of plasma temperature are observed through the production of x-rays in different targets. 2D PIC simulations were performed to measure the polarization dependency of bulk electron temperature, which supports our experimental results. This paper could be of importance in understanding the different behavior of laser coupling at different polarizations and their role in x-ray production.

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IITH Creators:

IITH Creators	ORCiD
Ramakrishna, Bhuvanesh	http://www.orcid.org/0000-0002-2728-6809

Item Type:

Article

Uncontrolled Keywords:

bulk electron temperature; K alpha; laser plasma; polarization; Electron temperature; Laser produced plasmas; Plasma interactions; Pyrolytic graphite; X ray scattering; Bulk electron temperature; Bulk electrons; Cu target; K alpha; Laser-plasmas; Petawatt; Polarization dependency; Solid density plasmas; VULCAN laser; X-ray emission

Subjects:

Physics
Physics > Sound, light and Heat

Divisions:

Department of Physics

Depositing User:

Mr Nigam Prasad Bisoyi

Date Deposited:

24 Sep 2023 10:11

Last Modified:

24 Sep 2023 10:11

URI:

http://raiithold.iith.ac.in/id/eprint/11690