Debug Dispersion measurement and added first support for XTCAV stabilizer

interface/slic.py

@@ -28,11 +28,12 @@ class SlicScan(QObject):
 
     def start(self,daq,snap=False):
         self.clear()
+        self.daq=daq
         Thread(target=self.Tmonitor).start()
         self.startSnap(snap)
 
     def startSnap(self,snap=False):
-        if not snap:
+        if snap:
             Thread(target=self.Tsnap).start()
 
     def Tsnap(self):