The 9th NLTE Code Comparison Workshop
November 30 - December 4 2015, Paris, France
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Supported by:
CEA,
NIST
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Advanced collisional-radiative (CR) models are extensively used in plasma
spectroscopy to analyze plasma kinetics and spectra produced far from local
thermodynamic equilibrium (LTE). Non-LTE atomic models also play a critical role
in radiation-hydrodynamic simulations used to help design plasma experiments. It
is therefore not surprising that verification and validation (V&V) of these
complex CR models are of significant interest. Since experimental benchmarks for
validation are extremely challenging, computational experiments and comparisons
are one of the primary tools for V&V of CR codes. The NLTE Workshops aim at
development of such tools and techniques.
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| Meeting |
Year |
Location |
Results |
| NLTE-1 |
1996 |
Gaithersburg, USA |
Lee et al, JQSRT 58, 737 (1997) |
| NLTE-2 |
2001 |
Virtual Workshop |
Bowen et al, JQSRT 81, 71 (2003) |
| NLTE-3 |
2003 |
Gaithersburg, USA |
Bowen et al, JQSRT 99, 102 (2005) |
| NLTE-4 |
2005 |
Las Palmas de Gran Canaria, Spain |
Rubiano et al, HEDP 3, 225 (2007) |
| NLTE-5 |
2007 |
Santa Fe, USA |
Fontes et al, HEDP 5, 15 (2009) |
| NLTE-6 |
2009 |
Athens, Greece |
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| NLTE-7 |
2011 |
Vienna, Austria |
Chung
et al, HEDP, 9, 645 (2013) |
| NLTE-8 |
2013 |
Santa Fe, USA |
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Important!
Similar to the previous workshops,
a necessary and sufficient condition for participation would be to submit at least one calculated case. A detailed description of the cases and format requirements can be found in the
Call for Submissions.
It would also be very helpful if you inform the organizers on your intention to participate in this Workshop.
Summary of cases for Fe
| Te (eV) |
Ne (cm-3) |
Trad (eV), dilution factor |
Plasma radius (cm) |
Spectral ranges |
Additional info |
| 30, 60, 120, 200, 400, 700, 1000, 2000, 4000 |
1014, 1019, 1022, 1024 |
0 and 250 eV, 0 and 0.02 |
0 and 0.1 |
λ=10-18 Å, δλ=0.002 Å (4001 points)
λ=1.5-2 Å, δλ=0.0005 Å (2501 points)
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Total of 63 cases |
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Fit of experimental spectra (links on the left): vary plasma parameters (temperature, density, size) to get
the best agreement with the measured spectra from laser-produced plasmas and tokamaks.
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We also propose to perform a very limited set of calculations for the same set of atomic data, namely,
1s2,
1s2l and
2l2l' states in Fe XXV,
1s and
2l states in Fe XXVI and bare nucleus (total of 22 atomic levels). The details will be
provided shortly.
In addition to the case analyses, we plan to have a special session discussing development and usage of FAC and
HULLAC codes.
Location, accommodation, etc.
The meeting will be held in the Atrium Building on the Pierre et Marie Curie University. More details will be
provided later.
There are numerous hotels in the area, please see the map on the left.
New message from the organizers (Sep 2):
We managed to negotiate a group-rate in the "Hotel
Quartier Latin", which is really close to Jussieu. In our opinion, it is the
most pleasant hotel among those we had put on the map. The rate is quite low :
130 euros per night, breakfast included. The hotel is quite small (they have a
total of 29 rooms) and they can only put an option on a block of 5 rooms until
October 30th. Getting more than 5 rooms is possible, but it will depend on the
rooms availability. Consequently, to take advantage of this rate, participants
should better book a room quickly (the quicker the better). A condition to get
the special rate was that after October 30th, the reservations cannot be
cancelled. This was non-negotiable because the hotel wanted to account for the
eventuality a cancellation of the whole meeting.
More details on this offer are here.
We plan an informal reception on the night of Mon Nov 30 and a dinner on Thu Dec 3.
Computer Equipment
We will have an Internet connection at Atrium and a dedicated wireless
network for the Workshop purposes.
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