Debug Dispersion measurement and added first support for XTCAV stabilizer

app/xtcavstabilizer.py

@@ -0,0 +1,29 @@
+import time
+import numpy as np
+
+from bstrd import BSCache
+
+class XTCAVStabilizer:
+    """
+    Wrapper class to bundle all daq/io needed for stabilizing the XTCAV
+    """
+    def __init__(self):
+        self.bs = BSCache(100000,10000)  # 100 second timeout, size for 100 second data taken         
+        self.channels = ['SATBD02-DBPM040:X2','SATMA02-RLLE-DSP:PHASE-VS']
+        self.bs.get_vars(self.channels)  # this starts the stream into the cache
+        self.bs.stop()
+
+ 
+    def terminate(self):
+        print('Stopping BSStream Thread...')    
+        self.bs.stop()
+        self.bs.pt.running.clear() # for some reason I have to
+
+    def flush(self):
+        self.bs.flush()
+
+    def read(self):
+        data=self.bs.__next__()
+        return data['pid'],data[self.channels[0]],data[self.channels[1]]  # returns PID, BPM reading, TCAV Phase 
+
+