Startup

script/PolSwitch.py

@@ -0,0 +1,80 @@
+#Parameters
+'''
+B = 0.5     # starting mag. field in Amps
+E1 = 704 #start energy
+E2 = 708 #end energy
+dE = 1.0 # energy step size
+MODE = 1  #polarization (CIRC+ -> 1 or CIRC- -> 2)
+OFFSET1 = -15 #ID1 offset
+OFFSET2 = -15 #ID2 offset
+FIELD_PRECISION = 0.05 #  in Amps
+ENERGY_CHANGE_SLEEP = 0.0 # put the Enerrgy settling time if needed
+'''
+
+
+#Pre-actions
+# Here polarization and offsets are set
+
+caput ("X11PHS-E:OPT","PGM+ID1+ID2")
+caput(OTF_OFF1,OFFSET1) #detune ID1
+caput(OTF_OFF2,OFFSET2) #detune ID2
+wait_channel(OTF_DONE, 1, type = 'i')
+
+if MODE is 1 or 2:
+    caput(OTF_MODE1,MODE)
+    caput(OTF_MODE2,MODE)
+else:
+    raise Exception("Invalid polarization type: " +  MODE)
+    
+wait_channel(OTF_DONE, 1, type = 'i')
+
+# Generating a list of setpoints needed for the loop
+setpoints = frange(E1,E2,dE,True)
+fields = [B,-B]
+
+# plot properties
+set_preference(Preference.ENABLED_PLOTS,  ['energy', 'tey_norm'])
+set_preference(Preference.PLOT_TYPES, {'tey_norm':1})
+
+scan = ManualScan('Energy', 'Field'], ['TEY', 'I0', 'polarization', 'RingCurrent', 'tey_norm'] , [min(setpoints), min(fields)], [max(setpoints), max(fields)], [len(setpoints)-1, len(fields)-1])
+scan.start()
+
+# Main loop
+for E in setpoints:
+    print "Setting Energy = ", E
+    caput("OTF_ESET",E)
+    wait_channel(OTF_DONE, 1, type = 'i')     # Settling time
+
+    readback1 = caget("X11MA-XMCD:Ireadout")    
+    if abs(readback1 - E) > 0.1 : # TODO: Check accuracy
+        raise Exception('Energy could not be set to the value ' + str(E))
+    sleep( ENERGY_CHANGE_SLEEP ) # Settling time
+
+    for H in fields:
+        print "Setting mag. field = ", H
+        caput("X11MA-XMCD:I-SETraw",H)
+        
+        readback2 = caget("X11MA-XMCD:Ireadout")    
+        while abs(readback2-B) > FIELD_PRECISION:
+            readback2 = caget("X11MA-XMCD:Ireadout")
+            time.sleep(0.5)
+
+        detector1 = keithley_1a.read() #Keithley1
+        detector2 = keithley_2a.read() #Keithley2
+        #detector3 = keithley_3a.read() #Keithley3
+        detector4 = caget(OTF_MODE1)   #polarization in ID1
+        #detector5 = caget("X11MA-ID1:ALPHA-READ") # polAngle in ID1
+        #detector6 = caget('X11MA-ES3-LSCI:TEMP_RBV') #temperature.get() 
+        detector7 = caget("ARIDI-PCT:CURRENT")
+        #detector8 = signal_field_analog_x.read() # fieldAnalogX.get() 
+        tey_norm = detector1/detector2     
+        #trans_norm = detector3/detector2
+
+        #converting polarization strings to integer numbers: C+ -> 1 and C- -> 2
+        if detector4 == 'CIRC +': detector4 = 1
+        elif detector4 == 'CIRC -': detector4 = 2
+        else: detector4 = 0
+
+        scan.append ([E, H], [readback1, readback2], [detector1, detector2, detector4, detector7, tey_norm])
+
+scan.end()