def get_spectrum_count(self, freq, power):
back_to_back = int(self.parameters.BareLineScan.pulse_sequences_per_timetag_transfer)
total_timetag_transfers = int(self.parameters.BareLineScan.total_timetag_transfers)
self.program_pulser(freq,power)
self.binner = Binner(self.timetag_record_cycle['s'], 100e-9)
for index in range(total_timetag_transfers):
self.pulser.start_number(back_to_back)
self.pulser.wait_sequence_done()
self.pulser.stop_sequence()
#get timetags and save
timetags = self.pulser.get_timetags().asarray
#print self.parameter.DopplerCooling.doppler_cooling_duration
if timetags.size >= self.parameters.BareLineScan.max_timetags_per_transfer:
raise Exception("Timetags Overflow, should reduce number of back to back pulse sequences")
else:
self.dv.add([index, timetags.size], context = self.total_timetag_save_context)
iters = index * numpy.ones_like(timetags)
self.dv.add(numpy.vstack((iters,timetags)).transpose(), context = self.timetag_save_context)
#collapse the timetags onto a single cycle starting at 0
timetags = timetags - self.start_recording_timetags['s']
timetags = timetags % self.timetag_record_cycle['s']
self.binner.add(timetags, back_to_back * self.parameters.BareLineScan.cycles_per_sequence)
blue_duration = self.parameters['BareLineScan.duration_397_pulse']['s']
gap_duration = self.parameters['BareLineScan.between_pulses']['s']
count = self.binner.getCount(gap_duration,2.0*gap_duration+blue_duration)
return count
class bare_line_scan(experiment):
name = 'BareLineScan'
required_parameters = [
('BareLineScan','bin_every'),
('BareLineScan','pulse_sequences_per_timetag_transfer'),
('BareLineScan','total_timetag_transfers'),
('BareLineScan','max_timetags_per_transfer'),
('BareLineScan','doppler_cooling_duration'),
('BareLineScan','frequency_scan'),
('BareLineScan','use_calibrated_power'),
('BareLineScan','calibrated_power_dataset'),
('Crystallization', 'auto_crystallization'),
('Crystallization', 'camera_record_exposure'),
('Crystallization', 'camera_threshold'),
('Crystallization', 'max_attempts'),
('Crystallization', 'max_duration'),
('Crystallization', 'min_duration'),
('Crystallization', 'pmt_record_duration'),
('Crystallization', 'pmt_threshold'),
('Crystallization', 'use_camera'),
]
required_parameters.extend(sequence.all_required_parameters())
required_parameters.remove(('DopplerCooling','doppler_cooling_duration'))
# this parameter will get scanned #
required_parameters.remove(('BareLineScan','frequency_397_pulse'))
#required_parameters.remove(('BareLineScan','amplitude_397_pulse'))
def initialize(self, cxn, context, ident):
self.ident = ident
self.cxnlab = labrad.connect('192.168.169.49') #connection to labwide network
self.dv = cxn.data_vault
self.pulser = cxn.pulser
self.scan = []
self.spectrum_counts = []
self.use_calibrated_power = self.parameters.BareLineScan.use_calibrated_power
self.calibrated_power_dataset = int(self.parameters.BareLineScan.calibrated_power_dataset)
self.timetag_save_context = cxn.context()
self.binned_save_context = cxn.context()
self.total_timetag_save_context = cxn.context()
self.spectrum_save_context = cxn.context()
self.load_calibrated_power_context = cxn.context()
self.timetags_since_last_binsave = 0
self.bin_every = self.parameters.BareLineScan.bin_every
self.setup_data_vault()
self.setup_initial_switches()
self.show_histogram = True
if self.parameters.Crystallization.auto_crystallization:
self.crystallizer = self.make_experiment(crystallization)
self.crystallizer.initialize(cxn, context, ident)
def setup_data_vault(self):
localtime = time.localtime()
datasetNameAppend = time.strftime("%Y%b%d_%H%M_%S",localtime)
dirappend = [ time.strftime("%Y%b%d",localtime) ,time.strftime("%H%M_%S", localtime)]
directory = ['','Experiments']
directory.extend([self.name])
directory.extend(dirappend)
self.dv.cd(directory ,True, context = self.timetag_save_context)
self.dv.new('Timetags {}'.format(datasetNameAppend),[('Time', 'sec')],[('Photons','Arb','Arb')], context = self.timetag_save_context)
self.dv.cd(directory , context = self.total_timetag_save_context)
self.dv.new('Total Timetags Per Transfer {}'.format(datasetNameAppend),[('Time', 'sec')],[('Total timetags','Arb','Arb')], context = self.total_timetag_save_context)
self.dv.cd(directory , context = self.spectrum_save_context)
self.dv.new('BareLineSpectrum {}'.format(datasetNameAppend),[('Frequency', 'MHz')],[('Counts','Arb','Arb')], context = self.spectrum_save_context)
self.dv.add_parameter('plotLive', True, context = self.spectrum_save_context)
self.dv.add_parameter('Window', ['BareLineScan Spectrum'], context = self.spectrum_save_context)
self.dv.cd(directory , context = self.timetag_save_context)
self.dv.cd(directory , context = self.binned_save_context)
self.dv.cd(directory , context = self.spectrum_save_context)
def setup_initial_switches(self):
self.pulser.switch_auto('866DP', True) #high TTL corresponds to light OFF
self.pulser.switch_manual('crystallization', False)
#switch off 729 at the beginning
self.pulser.output('729DP', False)
# setup frequency scan #
def setup_sequence_parameters(self):
line_scan = self.parameters.BareLineScan
#self.parameters['BareLineScan.frequency_397_pulse'] = line_scan.rabi_amplitude_729
self.parameters['DopplerCooling.doppler_cooling_duration'] = self.parameters.BareLineScan.doppler_cooling_duration
minim,maxim,steps = line_scan.frequency_scan
minim = minim['MHz']; maxim = maxim['MHz']
self.scan_no_unit = linspace(minim,maxim, steps)
self.scan = [WithUnit(pt, 'MHz') for pt in self.scan_no_unit]
def program_pulser(self, frequency_397,amplitude_397):
self.pulser.reset_timetags()
self.parameters['BareLineScan.frequency_397_pulse'] = frequency_397
self.parameters['BareLineScan.amplitude_397_pulse'] = amplitude_397
pulse_sequence = sequence(self.parameters)
pulse_sequence.programSequence(self.pulser)
self.timetag_record_cycle = pulse_sequence.timetag_record_cycle
self.start_recording_timetags = pulse_sequence.start_recording_timetags
def get_spectrum_count_crystallizing(self, cxn, context, freq, power):
count = self.get_spectrum_count(freq,power)
if self.parameters.Crystallization.auto_crystallization:
initally_melted, got_crystallized = self.crystallizer.run(cxn, context)
#if initially melted, redo the point
while initally_melted:
if not got_crystallized:
#if crystallizer wasn't able to crystallize, then pause and wait for user interaction
self.cxn.scriptscanner.pause_script(self.ident, True)
should_stop = self.pause_or_stop()
if should_stop: return None
count = self.get_spectrum_count(freq,power)
initally_melted, got_crystallized = self.crystallizer.run(cxn, context)
return count
def get_spectrum_count(self, freq, power):
back_to_back = int(self.parameters.BareLineScan.pulse_sequences_per_timetag_transfer)
total_timetag_transfers = int(self.parameters.BareLineScan.total_timetag_transfers)
self.program_pulser(freq,power)
self.binner = Binner(self.timetag_record_cycle['s'], 100e-9)
for index in range(total_timetag_transfers):
self.pulser.start_number(back_to_back)
self.pulser.wait_sequence_done()
self.pulser.stop_sequence()
#get timetags and save
timetags = self.pulser.get_timetags().asarray
#print self.parameter.DopplerCooling.doppler_cooling_duration
if timetags.size >= self.parameters.BareLineScan.max_timetags_per_transfer:
raise Exception("Timetags Overflow, should reduce number of back to back pulse sequences")
else:
self.dv.add([index, timetags.size], context = self.total_timetag_save_context)
iters = index * numpy.ones_like(timetags)
self.dv.add(numpy.vstack((iters,timetags)).transpose(), context = self.timetag_save_context)
#collapse the timetags onto a single cycle starting at 0
timetags = timetags - self.start_recording_timetags['s']
timetags = timetags % self.timetag_record_cycle['s']
self.binner.add(timetags, back_to_back * self.parameters.BareLineScan.cycles_per_sequence)
blue_duration = self.parameters['BareLineScan.duration_397_pulse']['s']
gap_duration = self.parameters['BareLineScan.between_pulses']['s']
count = self.binner.getCount(gap_duration,2.0*gap_duration+blue_duration)
return count
def run(self, cxn, context):
self.setup_sequence_parameters()
#calibrated_power=numpy.array([-16.96875,-17.2109375, -17.59765625, -17.7265625 , -17.6953125, -17.49609375 ,-16.2890625, -15.20703125 ,-14.64453125 ,-12.125])
if self.use_calibrated_power:
self.dv.cd(['','QuickMeasurements'] ,True, context = self.load_calibrated_power_context)
data_set_number = int(self.calibrated_power_dataset)
self.dv.open(data_set_number, context = self.load_calibrated_power_context)
data = self.dv.get(context = self.load_calibrated_power_context).asarray
calibrated_power = data[:,1]
else:
amplitude_397=self.parameters['BareLineScan.amplitude_397_pulse']
calibrated_power = amplitude_397['dBm']*numpy.ones_like(self.scan_no_unit)
#calibrated_power=numpy.array([-23.8203125, -23.8203125, -24.0703125, -24.0390625, -23.8828125, -23.6640625, -22.3515625, -21.203125, -20.7421875, -18.2265625])
for i,frequency_397 in enumerate(self.scan):
#can stop between different frequency points
should_stop = self.pause_or_stop()
if should_stop: break
count = self.get_spectrum_count_crystallizing(cxn,context,frequency_397,WithUnit(calibrated_power[i],'dBm'))
self.dv.add([frequency_397['MHz'],count], context = self.spectrum_save_context)
if self.show_histogram:
self.save_histogram()
self.update_progress(i)
def save_histogram(self, force = False):
bins, hist = self.binner.getBinned(False)
localtime = time.localtime()
datasetNameAppend = time.strftime("%Y%b%d_%H%M_%S",localtime)
self.dv.new('Binned {}'.format(datasetNameAppend),[('Time', 'us')],[('CountRate','Counts/sec','Counts/sec')], context = self.binned_save_context)
self.dv.add_parameter('plotLive', True , context = self.binned_save_context)
self.dv.add_parameter('Window', ['BareLineScan Histogram'], context = self.binned_save_context)
self.dv.add(numpy.vstack((bins,hist)).transpose(), context = self.binned_save_context)
def finalize(self, cxn, context):
self.save_parameters(self.dv, cxn, self.cxnlab, self.timetag_save_context)
def update_progress(self, iteration):
progress = self.min_progress + (self.max_progress - self.min_progress) * float(iteration + 1.0) / len(self.scan)
self.sc.script_set_progress(self.ident, progress)
def save_parameters(self, dv, cxn, cxnlab, context):
measuredDict = dvParameters.measureParameters(cxn, cxnlab)
dvParameters.saveParameters(dv, measuredDict, context)
dvParameters.saveParameters(dv, dict(self.parameters), context)