diff --git a/csst_mci_sim/csst_mci_sim.py b/csst_mci_sim/csst_mci_sim.py
index 38574c5ab13a2bf2659594fbff39e122c1ecf341..06b6ea2f34db4f35a405b2c24ef1f06851229656 100644
--- a/csst_mci_sim/csst_mci_sim.py
+++ b/csst_mci_sim/csst_mci_sim.py
@@ -1046,7 +1046,7 @@ class MCIsimulator():
         #     else:
         #         self.result_path = '/data/mcisimdata/'+result_day
                     
-        self.result_path = self.information['result_path']+self.source+"_"+result_day
+        self.result_path = self.information['result_path']+result_day
         
         if os.path.isdir(self.result_path)==False:
             os.mkdir(self.result_path)