From e942fc71eaf99ebd47c2bafdafa8b20c9ddfaa85 Mon Sep 17 00:00:00 2001
From: Dawn <jiaxin.duan@psi.ch>
Date: Fri, 24 Apr 2026 17:03:01 +0200
Subject: [PATCH] add a mock grid simulation option at no_beam condition,
 default to be false

---
 src/aare/common/raster_grid.py | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/aare/common/raster_grid.py b/src/aare/common/raster_grid.py
index 7c4327ff..676cf2d9 100644
--- a/src/aare/common/raster_grid.py
+++ b/src/aare/common/raster_grid.py
@@ -32,6 +32,10 @@ class RasterGridRequest(BaseModel):
 
     visible: bool = True
 
+    # When True, skip all hardware and generate simulated diffraction data.
+    # The file_prefix will have "_SIMU" appended so the DB record is identifiable.
+    no_beam: bool = False
+
     def get_image_number(self) -> int:
         return self.n_x * self.n_y