Abstract in atti di convegno, 2022, ENG

Preliminary gas desorption studies from tungsten exposed to He plasma in GyM linear device using Laser Induced Desorption Spectroscopy

Laguardia L.; Iafrati M.; Alonzo M.; Pedroni M.; Vassallo E.; De Angeli M.; Ghezzi F.; Gervasini G.; Uccello A.; Cremona A.; Mellera V.; Rufoloni A.

CNR ISTP - Istituto per la Scienza e Tecnologia dei Plasmi, Milano, Italy; ENEA, Department of Fusion and Nuclear Safety Technology, Frascati, Roma, Italy.

Laser Induced Desorption Spectroscopy (LIDS) has been used to investigate the helium desorption from coatings and bulk tungsten in laboratory experiments as a prerequisite for the later application in-situ in the GyM linear device. Tungsten coatings were deposited on a silicon substrate by magnetron sputtering process. After a preliminary surface characterization and before studying the gas desorption by LIDS, both types of tungsten samples were exposed to helium plasma in the GyM linear device. A Nd:YAG laser with constant output power leading to a smooth controllable increase of layer temperature was used, resulting in a complete desorption of gases in a point heated by the laser. The desorbed gases were detected up to 200 amu/e with a QMS (Quadrupole Mass Spectrometer). The results of the application of LIDS on tungsten targets exposed to a wide range of helium fluxes, fluences, and impact energies under different surface temperatures are presented and compared with Thermal Desorption Spectrometry (TDS) and Laser Induced Breakdown Spectroscopy (LIBS).

32nd Symposium on Fusion Technology - SOFT 2022, Dubrovnik, Croatia / hybrid, 18-23 September 2022

Keywords

Diagnostics, Laser Induced Desorption Spectroscopy (LIDS), GyM linear device, Helium Plasma

CNR authors

De Angeli Marco, Vassallo Espedito, Ghezzi Francesco Mauro, Gervasini Gabriele, Cremona Anna, Mellera Vittoria Antonia, Laguardia Laura, Causa Federica, Uccello Andrea, Pedroni Matteo

CNR institutes

ISTP – Istituto per la Scienza e Tecnologia dei Plasmi

ID: 471692

Year: 2022

Type: Abstract in atti di convegno

Creation: 2022-10-05 11:46:20.000

Last update: 2023-07-04 18:10:28.000

External links

OAI-PMH: Dublin Core

OAI-PMH: Mods

OAI-PMH: RDF

URL: https://soft2022.eu/Programme/Programme-Overview

External IDs

CNR OAI-PMH: oai:it.cnr:prodotti:471692