chianti 10 problems

8 views
Skip to first unread message

Marios Chatzikos

unread,
Jul 13, 2022, 11:47:05 AM7/13/22
to chi...@googlegroups.com, ga...@g.uky.edu
Hello,

I am working on releasing Chianti 10 with the upcoming version of
Cloudy.  This is an upgrade from Chianti v7 that we've been using so far.

Our test harness has spotted a few issues to which I'd like to bring
your attention.

First, the line Fe 8 270.090A is no longer available with Chianti.  In
version 7, it was available as

    5 - 53   270.090   3s2.3p5.3d2 4D2.5 - 3s2.3p6.4f 2F2.5

Level 53 is indexed as 64 in Chianti 10:

v 7:  53     6  3s2.3p6.4f     2  3 F 2.5  6     763703.000       
6.95937     776954.000 7.08013          0.000        0.00000
v10:      64     3s2 3p6 4f                        2  F 2.5    
763703.000     763663.000

but the line is not listed in .wgfa:

    1   64        130.941 2.418e+00      1.570e+11   3s2 3p6 3d 2D3/2 -
3s2 3p6 4f 2F5/2
   51   64        909.207      2.731e+00      3.670e+09   3s2 3p6 4d
2D3/2 - 3s2 3p6 4f 2F5/2
    2   64        131.257      1.770e-01      1.140e+10   3s2 3p6 3d
2D5/2 - 3s2 3p6 4f 2F5/2

Second, there are several transitions in .wgfa and .scups files that
list the upper level index first.  Although it was not difficult to
address the issue, I'm listing them here in the hope it will be useful
to you:

c_5.scups: 5-4, 5-3, 4-3, 6-3
c_6.scups: 3-2
fe_18.wgfa: 286-211, 285-212, 285-213, 285-214, 286-215, 286-216,
290-217, 290-219, 290-222, 308-224, 314-244, 323-261, 285-273, 286-273,
299-273, 301-273, 304-273, 306-273, 319-273, 321-273, 322-273, 333-273,
288  274, 308-274, 309-274, 326-274, 332-274, 288-275, 307-275, 310-275,
332-275, 299-276, 319-276, 321-276, 333-276, 334-276, 301-277, 317-277,
318-277, 320-277, 334-277, 336-278, 335-279
n_1.wgfa: 3-2
ne_4.wgfa: 3-2
ni_2.wgfa: 12-11
o_2.scups: 5-4
o_8.wgfa: 3-2
s_10.scups: 7-6, 8-6, 8-7, 13-12, 15-14

Sincerely,

Marios Chatzikos
Univ. of Kentucky

Kenneth P Dere

unread,
Jul 13, 2022, 12:45:26 PM7/13/22
to chi...@googlegroups.com, ga...@g.uky.edu
Hi Marios,

the reason the level labeling seems to be reversed is that the excitation rates were created with a different energy ordering that in the latest files.  this is true for ions in the helium and hydrogen sequences and fe_18.

Also, for n_1, if you look a the .elvlc files, you will see that they the energy levels for 2 and 3 are not in the order of the energy, consequently the level labels are reversed.

Probably the same for many others.

regards,

Ken 
From: chi...@googlegroups.com <chi...@googlegroups.com> on behalf of Marios Chatzikos <mchat...@gmail.com>
Sent: Wednesday, July 13, 2022 11:47 AM
To: chi...@googlegroups.com <chi...@googlegroups.com>
Cc: ga...@g.uky.edu <ga...@g.uky.edu>
Subject: chianti 10 problems
 

Marios Chatzikos

unread,
Jul 13, 2022, 1:07:37 PM7/13/22
to Kenneth P Dere, chi...@googlegroups.com, ga...@g.uky.edu

Hi Ken,


That makes sense, I see.


I wonder if you could comment on the missing Fe 8 line?


Thanks,

Marios

Young, Peter R. (GSFC-6710)

unread,
Jul 13, 2022, 1:28:31 PM7/13/22
to chi...@googlegroups.com, Kenneth P Dere, ga...@g.uky.edu

Hi Marios,

 

Thanks for using CHIANTI. For fe_8, the old file contained every A-value from the upper level, but at some point we trimmed the wgfa files so that only the strongest transitions from the upper levels are retained. The cutoff is usually 10^-7. That is, if the strongest A-value from a level is 10^10, then any A-values below 10^3 will not be included in the wgfa file. We do this to keep the file size down, and also because these transitions will be too weak to be observed and they don't have any impact on the level population calculations.

 

                Peter

Reply all
Reply to author
Forward
0 new messages