QDB: a new database of plasma chemistries and reactions

Abstract

One of the most challenging and recurring problems when modeling plasmas is the lack of data on the key atomic and molecular reactions that drive plasma processes. Even when there are data for

Comparisons of Quantemol and Morgan LXCat cross section sets for electron-neutral scattering and rate-coefficients: Helium and water

“…They are grouped as four scattering processes, referred as elastic momentum transfer, excitation in 2 3 S 1 +2 1 S 0 states, total excitation (summing all the states with threshold of 20.6eV and higher) and ionization, representing one of the complete sets of cross sections for electron scattering in helium (Pancheshnyi et al, 2012). Data currently available at QDB are referred as cross section for electron elastic scattering from ground state helium, excitation in He * , excitation in He ** state and ionization (Tennyson et al, 2017).…”

“…BE is solved by electron Boltzmann solver BOLSIG+ (Hagelaar et al, 2005) which calculates EEDF based on two-term approximation expansion in Legendre polynomials (Lieberman and Lichtenberg, 2005;Makabe and Petrović, 2006). Comparison of results for helium and water is chosen by having in mind the importance of these gases in low-temperature atmospheric pressure plasmas with applications in medicine and agriculture, according to the recent publications (Liu et al, 2010;Bruggeman and Schram, 2010;Murakami et al, 2013;Mladenović et al, 2018;Schroter et al, 2018;Lazović et al, 2010 (Tennyson et al, 2017), with cross section sets from Morgan database at LXCat project (Morgan database, 2019). While there are other sets of cross sections for helium in that database more or less based on the low energy cross section of Crompton and coworkers (Crompton et al, 1967;Milloy and Crompton, 1977) and the higher energy cross sections due to Phelps and coworkers, we have not pursued a more detailed comparisons as the primary goal was to ascertain whether the data presented in QDB are consistent with those obtained by swarm analyses.…”

A New Version of the Plasma Database for Plasma Physics in the Data Center for Plasma Properties

“…Quantemol (QDB) is a plasma process DB developed by the University College London in 2016, and it contains chemical data for plasma chemistry modeling. The QDB aims to provide an effective environment for collaborative research between schools and industry in the field of plasma modeling [13].…”

BEAMDB and MOLD—Databases at the Serbian Virtual Observatory for Collisional and Radiative Processes

“…Databases in atomic and molecular physics have become essential for developing models and simulations of complex physical and chemical processes and for the interpretation of data provided by observations and measurements, e.g., in laboratory plasma [1], and studying plasma chemistries and reactions in planetary atmospheres [2]. In the last decade large amounts of data have been collected for medical applications including stopping powers in different media and tissues as well as cross sections for atomic particles (photons, electrons, positrons, ions) interacting with biomolecules and their constituents in order to achieve an insight, at the molecular level, of the radiation damage and radiotherapy [3].…”