118 lines
4.2 KiB
Python
118 lines
4.2 KiB
Python
#Parameters
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B1 = 14 # starting mag. field in Amps
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B2 = -14# final mag. field in Amps
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BSTEP = 1 # step size mag. field in Amps
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E1 = 779.3; #list of energies in eV
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E2 = 770;
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MODE = 1 #polarization (CIRC+ -> 1 or CIRC- -> 2)
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OFFSET1 = -1.90 #ID1 offset
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OFFSET2 = -1.90 #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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ACC_TIME = 1.0 # accumulation time
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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,-50) #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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# setting number of samples to be averaged, which depends on the accumulation time
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avg = ACC_TIME * 10
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caput("X11MA-ES1-10ADC:AVG",avg)
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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 = ManualScan(['field', 'Energy'], ['I0', 'TEY', 'TFY', 'polarization', 'temperature', 'RingCurrent', 'tey_norm','tfy_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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os.chdir("/sls/X11MA/data/X11MA/beamtime_december/")
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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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#edge
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print "Setting energy = ", E1
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caput(OTF_ESET, E1)
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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]) > 0.1 : # TODO: Check accuracy
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#raise Exception('Energy could not be set to the value ' + str(E[0]))
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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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detector4 = caget(OTF_MODE2) #polarization in ID2
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M1 = detector2/detector1
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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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#preedge
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print "Setting energy = ", E2
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caput(OTF_ESET, E2)
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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[1]) > 0.1 : # TODO: Check accuracy
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#raise Exception('Energy could not be set to the value ' + str(E[0]))
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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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detector4 = caget(OTF_MODE2) #polarization in ID2
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M2 = detector2/detector1
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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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tey_norm = M2/M1;
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#scan.append ([B, E], [readback1, readback2], [detector1, detector2, detector4, detector6, detector7, tey_norm])
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scan.append ([B, E], [readback2], [detector1, detector2, detector4, tey_norm])
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filename=open("data1.txt","a")
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filename.write("%s %s %s %s %s \n" %(B,E,detector1,detector2,tey_norm))
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scan.end()
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filename.close()
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caput("X11MA-ES1-10ADC:AVG",1)
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caput("X11MA-XMCD:I-SETraw",0)
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close_vg13() |