95 lines
3.8 KiB
Python
95 lines
3.8 KiB
Python
import ch.psi.pshell.epics.ControlledVariable as ControlledVariable
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if get_exec_pars().source == CommandSource.ui:
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station = "SINSB04"
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bpm_ch = "SINBC02-DBPM140"
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else:
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station = args[0]
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bpm_ch = args[1]
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start = caget(station + "-RSYS:SET-SCAN-START")
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stop = caget(station + "-RSYS:SET-SCAN-STOP")
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step = caget(station + "-RSYS:SET-SCAN-STEP")
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lat = caget(station + "-RSYS:SET-SCAN-WAIT-TIME")
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nb = caget(station + "-RSYS:SET-NUM-AVERAGE")
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disp = caget(bpm_ch + ":DISPERSION")
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energy0 = caget(bpm_ch + ":ENERGY")
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phase = ControlledVariable("Phase", station + "-RSYS:SET-VSUM-PHASE-SIM", station + "-RSYS:GET-VSUM-PHASE-SIM")
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phase.config.minValue =-45.0
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phase.config.maxValue = 360.0
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phase.config.resolution = 0.5
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phase.initialize()
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V = Channel(station + "-RSYS:GET-VSUM-AMPLT-SIM", type = 'd', alias='Amplitude Readback')
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P = Channel(station + "-RSYS:GET-KLY-POWER-SIM", type = 'd', alias='Power Readback')
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x = Channel(bpm_ch + ":X1-SIMU", type = 'd', alias='BPM-X')
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caput(station + "-RSYS:GET-FIT-PHASE-ARRAY", to_array([0.0],'d'))
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caput(station + "-RSYS:GET-FIT-ENERGY-ARRAY", to_array([0.0],'d'))
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caput(station + "-RSYS:GET-ONCREST-VSUM-PHASE", float('nan'))
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caput(station + "-RSYS:GET-ONCREST-VSUM-AMPLT", float('nan'))
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caput(station + "-RSYS:GET-ONCREST-E-GAIN", float('nan'))
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caput(station + "-RSYS:GET-ONCREST-KLY-POWER", float('nan'))
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caput(station + "-RSYS:CALC-VSUM-PHASE-OFFSET", float('nan'))
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caput(station + "-RSYS:CALC-VSUM-AMPLT-SCALE" , float('nan'))
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caput(station + "-RSYS:CALC-VOLT-POWER-SCALE" , float('nan'))
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#update the plot dynamically
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arr_phase,arr_energy = [],[]
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def after(rec):
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global disp, energy0
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arr_phase.append(rec.positions[0])
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arr_energy.append(rec.values[1].mean/1000.0/disp*energy0)
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caput(station + "-RSYS:GET-ENERGY-ARRAY", to_array(arr_energy,'d'))
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caput(station + "-RSYS:GET-PHASE-ARRAY", to_array(arr_phase, 'd'))
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try:
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xb = create_averager(x, nb, 0.100)
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r = lscan(phase, [xb], start, stop, step , latency=lat, after_read = after)
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rf_phase = r.getPositions(0)
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energy = [val.mean/1000.0/disp*energy0 for val in r.getReadable(0)]
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caput(station + "-RSYS:GET-ENERGY-ARRAY", to_array(energy, 'd'))
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caput(station + "-RSYS:GET-PHASE-ARRAY", to_array(rf_phase,'d'))
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phase_fit_max = None
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try:
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(energy_max, angular_frequency, phase0, in_range, phase_fit_max, fit_x, fit_y) = hfit(energy , xdata = rf_phase)
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except:
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raise Exception("Fit failure")
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caput(station + "-RSYS:GET-ONCREST-VSUM-PHASE", phase_fit_max)
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caput(station + "-RSYS:GET-ONCREST-E-GAIN", energy_max)
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caput(station + "-RSYS:GET-FIT-PHASE-ARRAY", fit_x)
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caput(station + "-RSYS:GET-FIT-ENERGY-ARRAY", fit_y)
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phase_min, phase_max = min(rf_phase), max(rf_phase)
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if not (phase_min <= phase_fit_max <= phase_max):
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raise Exception("Fit maximum outside scan range")
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phase.write(phase_fit_max)
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time.sleep(lat)
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Ampl = V.read()
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Power = P.read()
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caput(station + "-RSYS:GET-ONCREST-VSUM-AMPLT", Ampl)
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caput(station + "-RSYS:GET-ONCREST-KLY-POWER", Power)
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finally:
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phase.close()
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V.close()
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P.close()
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x.close()
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print ("------------------------------------")
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print ("Valid fit")
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phase_offset = 90 - phase_fit_max
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amplitude_scale = energy_max / Ampl
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power_scale = Power / math.pow(Ampl,2)
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caput(station + "-RSYS:SET-VSUM-PHASE-OFFSET-BASE", phase_offset)
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caput(station + "-RSYS:SET-VSUM-AMPLT-SCALE", amplitude_scale)
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caput(station + "-RSYS:SET-VOLT-POWER-SCALE", power_scale)
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#title="Phase scan "+str(station)
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#message=("Energy Gain: %0.3f" % energy_gain + "MeV\n" +
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# "Phase Offset: %0.2f" % phase_offset + "deg\n" +
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# "Amplitude Scale: %0.3f" % amplitude_scale + "MV\n" +
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# "Power Scale: %0.3f" % power_scale) + "1/ohm"
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#elog(title, message)
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