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Status of L-mode database prepared by F. Imbeaux

Status of L-mode database prepared by F. Imbeaux. DWDIA and DWMHD. Between v2.2 and v2.3, the values of DWDIA and DWMHD have been changed for almost all tokamaks, without any clear reason

amela-herring
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Status of L-mode database prepared by F. Imbeaux

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  1. Status of L-mode database prepared by F. Imbeaux

  2. DWDIA and DWMHD • Between v2.2 and v2.3, the values of DWDIA and DWMHD have been changed for almost all tokamaks, without any clear reason • These changes lead to clearly wrong values for TEXTOR, C-MOD, TSUPRA, and certainly are also wrong for the other tokamaks • The corrupted values of DWDIA and DWMHD have been propagating from v2.3 to the recent versions of the DB, like v3.0 • To solve this problem, we have simply retrieved all the values of DWDIA and DWMHD from v2.2, and put them back in the latest version of the DB (now v3.1)

  3. DWDIA and DWMHD • Between v2.2 and v2.3, values of DWDIA and DWMHD equal to 0 have been turned into –9.999e-09 (default value). Was that justified ? • An e-mail was sent about this issue. All data providers that answered have confirmed that DWDIA = 0 in v2.2 was meaningful (i.e. shot stationary enough). • Therefore we assume that all zeros for DWDIA and DWMHD from v2.2 are valid. • Further input on that point is still welcome (we have done some corrections for DWMHD in T-10 data thanks to A. Chudnovski)

  4. WDIA and WMHD • J. De Boo and S. Kaye have recently discovered that many values of WDIA and WMHD are anomalously large with respect to WTOT, even in database versions from 1997. • On the website http://www-itpa0d.cea.fr/ there are database versions from v1.7 to v3.1. Please investigate : • Whether the data that you have submitted in the past is now corrupted in the v3.1 version • Try to identify from which version this corruption appears

  5. Recent submissions and perspectives • Recent submissions have been included in the v3.1 version: • NSTX (S. Kaye) • JET (data from 1992, K. Thomsen) • We will start using v3.1 and applying the error in variable method to revisit the beta dependence of the L-mode scaling (EPS poster).

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