88 lines
3.1 KiB
Python
88 lines
3.1 KiB
Python
#Parameters
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'''
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B1 = 0.5 # starting mag. field in Amps
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B2 = -0.5 # final mag. field in Amps
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BSTEP = 0.5 # step size mag. field in Amps
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ENERGIES = (707.90, 703.90) #list of energies in eV
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MODE = 1 #polarization (CIRC+ -> 1 or CIRC- -> 2)
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OFFSET1 = -40 #ID1 offset
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OFFSET2 = -15 #ID2 offset
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FIELD_PRECISION = 0.05 # in Amps
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ENERGY_CHANGE_SLEEP = 0.0 # put the Enerrgy settling time if needed
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FIELD_CHANGE_SLEEP = 0.0 # put the Field settling time if needed
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'''
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# List of scans. Each scan is defined as: (start,stop, step)
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# to make a whole loop two scans are needed: [(B1, B2, BSTEP),(B2,B1,-BSTEP)]
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# to make half of a loop one scan is needed: [(B1, B2, BSTEP),] <- don't forget to put comma before ]
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RANGES = [(B1, B2, -BSTEP),(B2,B1,BSTEP)]
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#Pre-actions
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# Here polarization and offsets are set
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caput ("X11PHS-E:OPT","PGM+ID2")
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caput(OTF_OFF1,OFFSET1) #detune ID1
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caput(OTF_OFF2,OFFSET2)
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wait_channel(OTF_DONE, 1, type = 'i')
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if MODE is 1 or 2:
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caput(OTF_MODE2,MODE)
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else:
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raise Exception("Invalid polarization type: " + MODE)
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wait_channel(OTF_DONE, 1, type = 'i')
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# Generating a list of mag. fields (setpoints) needed for the loop
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setpoints = []
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for r in RANGES:
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setpoints = setpoints + frange(r[0], r[1], r[2], True)
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# plot properties
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set_preference(Preference.ENABLED_PLOTS, ['field', 'tey_norm'])
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set_preference(Preference.PLOT_TYPES, {'tey_norm':1})
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scan = ManualScan(['field', 'Energy'], ['TEY', 'I0', 'polarization', 'temperature', 'RingCurrent', 'tey_norm'] , [min(setpoints), min(ENERGIES)], [max(setpoints), max(ENERGIES)], [len(setpoints)-1, len(ENERGIES)-1])
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scan.start()
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# Main loop
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for B in setpoints:
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print "Setting field = ", B
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caput("X11MA-XMCD:I-SETraw",B)
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time.sleep( FIELD_CHANGE_SLEEP ) # Settling time
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readback1 = caget("X11MA-XMCD:Ireadout")
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while abs(readback1-B) > FIELD_PRECISION:
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readback1 = caget("X11MA-XMCD:Ireadout")
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time.sleep(0.5)
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for E in ENERGIES:
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print "Setting energy = ", E
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caput(OTF_ESET, E)
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wait_channel(OTF_DONE, 1, type = 'i')
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readback2 = energy.read()
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if abs(readback2 - E) > 0.1 : # TODO: Check accuracy
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raise Exception('Energy could not be set to the value ' + str(E))
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sleep( ENERGY_CHANGE_SLEEP ) # Settling time
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detector1 = keithley_1a.read() #Keithley1
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detector2 = keithley_2a.read() #Keithley2
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#detector3 = keithley_3a.read() #Keithley3
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detector4 = caget(OTF_MODE1) #polarization in ID1
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#detector5 = caget("X11MA-ID1:ALPHA-READ") # polAngle in ID1
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detector6 = caget('X11MA-ES3-LSCI:TEMP_RBV') #temperature.get()
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detector7 = caget("ARIDI-PCT:CURRENT")
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#detector8 = signal_field_analog_x.read() # fieldAnalogX.get()
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tey_norm = detector1/detector2
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#trans_norm = detector3/detector2
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#converting polarization strings to integer numbers: C+ -> 1 and C- -> 2
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if detector4 == 'CIRC +': detector4 = 1
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elif detector4 == 'CIRC -': detector4 = 2
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else: detector4 = 0
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scan.append ([B, E], [readback1, readback2], [detector1, detector2, detector4, detector6, detector7, tey_norm])
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scan.end()
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