Fix: RF Translation & Thin Solenoid & More

Author: ax3l

src/python/impactx/MADXParser.py

@@ -735,7 +735,7 @@ class Beam:
     pc: float = 0.0  # momentum
     mass: float = 0.0
     charge: float = 0.0
-    freq0: float = 0.0  # revolution frequency [MHz]
+    freq0: float = 0.0  # revolution frequency [Hz]
 
 
 class EvaluationContext:
@@ -2215,9 +2215,14 @@ def _parse_beam_command(self):
                         sequence_name = self._advance().value.lower()
                     else:
                         self._parse_expression()  # consume
-                elif attr_name in ("energy", "pc", "mass", "charge", "freq0"):
+                elif attr_name in ("energy", "pc", "mass", "charge"):
                     expr = self._parse_expression()
                     beam_attrs[attr_name] = self.context.evaluate(expr)
+                elif attr_name == "freq0":
+                    expr = self._parse_expression()
+                    # MAD-X BEAM/FREQ0 is specified in MHz; normalize parser
+                    # state to Hz so downstream consumers use SI units.
+                    beam_attrs["freq0"] = self.context.evaluate(expr) * 1.0e6
                 else:
                     # Unknown attribute, skip the value
                     self._parse_expression()
@@ -2552,7 +2557,7 @@ def getEtot(self) -> float:
         return self.context.beam.energy
 
     def getFreq0(self) -> float:
-        """Get revolution frequency in MHz."""
+        """Get revolution frequency in Hz."""
         return self.context.beam.freq0
 
     def getOption(self, name: str, default: Any = 0.0) -> Any: