Merge pull request #52 from wlin6927/master

Add H- as a species
ChristopherMayes · Jun 19, 2024 · 309bc04 · 309bc04
2 parents 5eda4d5 + bce32ef
commit 309bc04
Showing 1 changed file with 9 additions and 4 deletions.
diff --git a/pmd_beamphysics/species.py b/pmd_beamphysics/species.py
@@ -9,22 +9,27 @@
 mec2 = scipy.constants.value('electron mass energy equivalent in MeV')*1e6
 mpc2 = scipy.constants.value('proton mass energy equivalent in MeV')*1e6
 
+mhmc2 = mpc2 + mec2 * 2 # H- mass energy equivalent in MeV
+
 e_charge = scipy.constants.e
 c_light = scipy.constants.c
 
 CHARGE_OF = {'electron': -e_charge,
             'positron': e_charge,
-            'proton': e_charge}
+            'proton': e_charge,
+            'H-': -e_charge}
 
 CHARGE_STATE = {
     'electron': -1,
     'positron': 1,
-    'proton': 1}
+    'proton': 1,
+    'H-': -1}
 
 
 MASS_OF = {'electron': mec2,
            'positron': mec2,
-           'proton': mpc2}
+           'proton': mpc2,
+           'H-': mhmc2}
 
 
 
@@ -51,4 +56,4 @@ def charge_state(species):
     raise ValueError(f'Species not available: {species}')    
 
 
-
+