Add NT confinement scaling

cfspopcon/formulas/energy_confinement/energy_confinement_scalings.yaml

@@ -314,3 +314,21 @@ H_DS03:
     triangularity_alpha: 0.0
     qstar_alpha: 0.0
 
+H_NTD3D24:
+  metadata:
+    reference: "Simultaneous access to high normalized density, current, pressure, and confinement in strongly-shaped diverted negative triangularity plasmas, C. Paz-Soldan et. al (2024) Nuclear Fusion, 64"
+    notes: ""
+    regime: "Neg-D"
+  params:
+    constant: 0.0562
+    mass_ratio_alpha: 0.19
+    field_on_axis_alpha: 0.108
+    plasma_current_alpha: 1.024
+    input_power_alpha: -0.907
+    major_radius_alpha: 1.97
+    triangularity_alpha: 0.0
+    inverse_aspect_ratio_alpha: 0.58
+    areal_elongation_alpha: 0.78
+    separatrix_elongation_alpha: 0.0
+    average_density_alpha: 0.508
+    qstar_alpha: 0.0

docs/refs.bib

@@ -740,4 +740,15 @@ @article{kallenbach2019neutral
   pages={166--174},
   year={2019},
   publisher={Elsevier}
+}
+
+@article{paz-soldan2024nt,
+	title = {Simultaneous access to high normalized density, current, pressure, and confinement in strongly-shaped diverted negative triangularity plasmas},
+	author = {Paz-Soldan, C. and Chrystal, C. and Lunia, P. and Nelson, A.O. and Thome, K.E. and Austin, M.E. and Cote, T.B. and Hyatt, A.W. and Leuthold, N. and Marinoni, A. and Osborne, T.H. and Pharr, M. and Sauter, O. and Scotti, F. and Wilks, T.M. and Wilson, H.S.},
+	journal = {Nuclear Fusion},
+	volume = {64},
+	issn = {0029-5515, 1741-4326},
+	pages = {094002},
+	year = {2024},
+	publisher={IOP Publishing}
 }