diff --git a/schemas/ispyb/updates/2026_03_18_ExperimentType_sxt.sql b/schemas/ispyb/updates/2026_03_18_ExperimentType_sxt.sql
new file mode 100644
index 0000000..fb1ed25
--- /dev/null
+++ b/schemas/ispyb/updates/2026_03_18_ExperimentType_sxt.sql
@@ -0,0 +1,7 @@
+INSERT IGNORE INTO SchemaStatus (scriptName, schemaStatus) VALUES ('2026_03_18_ExperimentType_sxt.sql', 'ONGOING');
+
+INSERT INTO ExperimentType (
+  experimentTypeId, name, proposalType, active
+) VALUES (47, 'Soft X-Ray Tomography', 'em', 1);
+
+UPDATE SchemaStatus SET schemaStatus = 'DONE' WHERE scriptName = '2026_03_18_ExperimentType_sxt.sql';