DISCUSSION on Data Needs for Molecular Hydrogen Modelling

✍ Scribed by U. Fantz; P. T. Greenland

• Publisher: John Wiley and Sons
• Year: 2002
• Tongue: English
• Weight: 74 KB
• Volume: 42
• Category: Article
• ISSN: 0005-8025
• DOI: 10.1002/1521-3986(200211)42:6/7<694::aid-ctpp694>3.0.co;2-2

✦ Synopsis

A discussion on data needs for molecular hydrogen modelling and spectroscopy formed part of the WHYPE workshop. Greenland and Fantz led the discussion, and stressed:

1. All the data mentioned below are needed for D 2 , D + 2 , HD, HD + as well as H 2 , H + 2 etc. In fact in many cases, for fusion plasma research, D 2 is more important than H 2 . Tritium will eventually be important.

2. Scaling laws and simple, perhaps empirical, rules for converting data amongst the hydrogen isotopomers would be useful.

3. Guidance on the circumstances under which simple approximations, rather than full calculations can be used to plug data gaps would enable the importance of the unknown data to be assessed.

4. Data is needed over a large energy range. In the TEXTOR edge, molecular spectroscopy is routinely done at electron temperatures of ∼ 30 -80 eV: divertor plasmas have temperatures ∼ 3 -10 eV, and in detached plasma conditions the temperature can fall below 1 eV.

Six topics were discussed.