From 3a0bbc4e2b7f4d75c3fae43e5f26f163c6c47318 Mon Sep 17 00:00:00 2001
From: daniel-dudt <daniel.dudt@princetonstellarators.energy>
Date: Mon, 26 Aug 2024 16:48:57 -0600
Subject: [PATCH] update default target and error checking

---
 desc/objectives/_power_balance.py | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/desc/objectives/_power_balance.py b/desc/objectives/_power_balance.py
index 4d23de063..bea66ebbe 100644
--- a/desc/objectives/_power_balance.py
+++ b/desc/objectives/_power_balance.py
@@ -81,7 +81,7 @@ def __init__(
             fuel not in ["DT"], ValueError, f"fuel must be one of ['DT'], got {fuel}."
         )
         if target is None and bounds is None:
-            target = 0
+            target = 1e9
         self._fuel = fuel
         self._grid = grid
         super().__init__(
@@ -113,6 +113,11 @@ def build(self, use_jit=True, verbose=1):
             ValueError,
             "Equilibrium must have an electron density profile.",
         )
+        errorif(
+            eq.ion_temperature is None,
+            ValueError,
+            "Equilibrium must have an ion temperature profile.",
+        )
         if self._grid is None:
             self._grid = QuadratureGrid(
                 L=eq.L_grid,