D. Kato

H.A. Sakaue

I. "Murakami

M." Kato

National Institute for Fusion Science (NIFS-Repository)

We have constructed and made public atomic and molecular (AM) numerical databases for various collision processes, mainly for fusion plasma research but also for other areas such as astrophysics, applied-science with low temperature plasmas, plasma processing, etc. The AM data activities in Japan were initiated in 1970s.The first retrieval AM database “AMDIS” was constructed in 1981 for electron impact ionization and excitation cross sections at Institute of Plasma Physics, Nagoya Univ. (IPPJ).  Following it, other databases have been built and the database system has expanded to cover a wide variety of collision processes in plasma and alsoplasma-wall interactions (PWI). The current web accessible database system1) has been opened and maintained since 1997. The database system consists of 6 sub databases. Table 1 shows a list of AM and PWI numerical databases as well as a bibliographic database “ORNL” for which original data records are collected by Oak Ridge National Laboratory (USA). Cross references are partly supported between bibliographic and numerical databases. Users can retrieve numerical data through the web form by element, ionic stage, initial states and other constraints.The databases include: “AMDIS” for cross sections and rate coefficients for electron impact ionization, excitation, recombination, and dissociation; “CHART” for cross sections of heavy particle collisions; “MOL” for numerical data on molecular collision processes, “SPUTY”for numerical data on sputtering yields for mono-atomic solids and “BACKS” for numerical data on reflection coefficients. During the 2011 fiscal year, we mainly updated the data for AMDIS. Fig.1 shows an example ofrecombination rate coefficient for a tungsten ion2,3). Aworking group has been organized to collect data systematically, and data on collision processes for hydrogen isotopes were searched in FY2011. In addition to the main databases, we have some small satellite databases which are not retrievable. These satellite databases are linked to the top page of the main database and numerical data are available as a text file. In FY2011,we have prepared a web page for a bibliographic database of electron – molecule collision processes, compiled by M. Hayashi. Some bibliographic databases are already published as NIFS-DATA series4). Recommended cross section data sets for some molecules by Hayashi, such as cross section data for C2H2 shown in Fig.2, will be open in a web page as well.Table 1. AM and PWI databasesName Records* PeriodAMDIS 465,991 1961-2011CHART 7,054 1957-2010MOL 3,765 1956-2009SPUTY 1,241 1931-2000BACKS 396 1976-2002ORNL 78,097 1959-2009* as of May 10, 2012.Fig. 1 Example of newly included data of dielectronic recombination rate coefficients for W64+ ion published in Ref. [2] (crosses) compared with data in Ref.[3] (circles).Fig. 2? Cross sections of electron-impact processes for C2H2. Data are compiled by M. Hayashi.1) NIFS Database, http://dbshino.nifs.ac.jp/2) U. I. Safronova et al., ADNDT 95 (2009) 751.3) E. Behar et al., Phys. Rev. A 59 (1999) 2787.4) M. Hayashi, NIFS-DATA 72 ; 74 ; 76 ; 77 (2003) ; 79 ;80 ; 81 ; 82 ; 83 ; 87; 90 (2004).294§7. Atomic and Molecular Numerical Databases and Data ActivitiesMurakami, I., Kato, D., Sakaue, H.A., Kato, M.

Atomic and Molecular Numerical Databases and Data Activities

Abstract

Similar works

Full text

Available Versions

National Institute for Fusion Science (NIFS-Repository)