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import logging
# this should be done before justpy is called or log formatter does not work
logging.basicConfig(format='%(asctime)s %(levelname)8s %(name)s: %(message)s', datefmt='%m/%d/%Y %H:%M:%S')
import pyvisa
import numpy as np
import platform
import time
from tqdm import tqdm as pbar
from qolab.hardware import BasicInstrument
from qolab.data import TraceSetSameX, TraceXY, Trace
from qolab.hardware.rf_generator import QOL_LMX2487
from qolab.hardware.daq import LabJackUE9
from qolab.hardware.power_supply.keysight_e3612a import KeysightE3612A
import qolab.tsdb as tsdb
l = logging.getLogger('qolab.tsdb')
l.setLevel(logging.INFO)
logger = logging.getLogger('Magnetometer')
logger.setLevel(logging.INFO)
def getConfig(apparatus):
config = apparatus.config.copy()
ai = apparatus.instruments
for n, i in ai.items():
config[n]=i.getConfig()
return config
class Apparatus(BasicInstrument):
def __init__(self, *args, **kwds):
super().__init__(*args, **kwds)
def getConfig(self):
config = self.config.copy()
ai = self.instruments
for n, i in ai.items():
config[n]=i.getConfig()
return config
# TSDB logger setting
tsdb_client = tsdb.Client('influx', 'http://lumus.physics.wm.edu:8428', database='qolab')
tsdb_ingester = tsdb.Ingester(tsdb_client, batch=11, measurement_prefix='VAMPIRE.VCSEL')
# creating Apparatus with all instruments to be logged
app_nickname = 'magnetometer'
apparatus = Apparatus(tsdb_ingester=tsdb_ingester, device_nickname=app_nickname,)
apparatus.config['Device type'] = 'QOL VAMPIRE VCSEL magnetometer'
apparatus.config['Device model'] = 'v0.1'
apparatus.config['FnamePrefix'] = 'magnetometer_eit'
# apparatus.config['SavePath'] = '/mnt/qol_grp_data/data.VAMPIRE.VCSEL'
apparatus.config['SavePath'] = './data'
logger.info("Accessing hardware")
rm = pyvisa.ResourceManager()
instr=rm.open_resource('USB0::10893::4354::MY61001869::0::INSTR')
ps = KeysightE3612A(instr, device_nickname='.'.join([app_nickname, 'coil_driver']), tsdb_ingester=tsdb_ingester)
if platform.system() == 'Linux':
rfgen_port='/dev/ttyUSB0'
else:
rfgen_port='COM4'
rfgen = QOL_LMX2487(port=rfgen_port, speed=115200, timeout=1, device_nickname='.'.join([app_nickname, 'rfgen']), tsdb_ingester=tsdb_ingester)
daq = LabJackUE9(device_nickname='.'.join([app_nickname, 'daq']), tsdb_ingester=tsdb_ingester)
logger.info("Adding instruments to apparatus")
apparatus.instruments={}
ai = apparatus.instruments
ai['rfgen'] = rfgen
ai['daq'] = daq
ai['coil_driver'] = ps
logger.info('Setting magnetic field coils currents')
# ps.setChanIout_mA(1, 70)
# ps.setChanIout_mA(2, 0)
# ps.setChanIout_mA(3, 0)
logger.info('Done setting magnetic field coils currents')
def setB(B=50e-6, theta=0, phi=0):
""" Sets B field currents based on B (in T) and angles theta, and phi """
"""
Rough magnetic field calibration of the 3 axes coils in large magnetic shield
- Ch1: 70mA -> 650 kHz shift for delta m = 2
- Ch2: 70mA -> 700 kHz shift for delta m = 2
- Ch2: 70mA -> 659 kHz shift for delta m = 2
A better calibration obtained on 20220601 see file
20220601.magnetic_field_callibration/calibration_currentToB.dat
"""
# B response to current in a given channel
Bslope_TperA = {
1: 0.0006574710928926532,
2: 0.0007064314754023079,
3: 0.0006635058865577695
}
Bx = B*np.sin(theta)*np.cos(phi)
By = B*np.sin(theta)*np.sin(phi)
Bz = B*np.cos(theta)
# assuming that Ch1 controls Bz, Ch2 -> By, Ch3 -> Bx
chX=3; chY=2; chZ=1
Ix = Bx / Bslope_TperA[chX]
Iy = By / Bslope_TperA[chY]
Iz = Bz / Bslope_TperA[chZ]
logger.info(f"Setting {chX=} to {Ix}")
logger.info(f"Setting {chY=} to {Iy}")
logger.info(f"Setting {chZ=} to {Iz}")
# ps.setChanIout(chX, Ix)
# ps.setChanIout(chY, Iy)
# ps.setChanIout(chZ, Iz)
return Ix, Iy, Iz
def setBdegrees(B=50e-6, theta=0, phi=0):
return setB(B=B, theta=theta/180*np.pi, phi=phi/180*np.pi)
def eitSweep(central_frequency, frequency_span, Np, Nsweeps=1):
frList = np.linspace(central_frequency-frequency_span/2, central_frequency+frequency_span/2, Np)
trFreq=Trace('Frequency')
trFreq.config['unit']='Hz'
trTransmission=Trace('Transmission')
trTransmission.config['unit']='Arb. Unit'
trLockin=Trace('Lockin')
trLockin.config['unit']='V'
trEIT = TraceSetSameX('EIT')
for sw in pbar(range(1,Nsweeps+1), desc="Sweep"):
for fr in pbar(frList, desc="Freq Scan"):
rfgen.setFreqFixed(float(fr))
time.sleep(dwellTime)
transmission = daq.getAIN(0)
lockin = daq.getAIN(1)
trFreq.addPoint(fr)
trTransmission.addPoint(transmission)
trLockin.addPoint(lockin)
# trFreq.values = trFreq.values - central_frequency
trEIT.addTraceX(trFreq)
trEIT.addTrace(trTransmission)
trEIT.addTrace(trLockin)
trEIT.config['tags']['apparatus']=apparatus.getConfig()
return trEIT
def getCurrentCalibrationData(ch=1):
curList = [20, 30, 40, 50, 60, 70, 80, 90, 100, 110]
ps.setChanIout_mA(1, 0)
ps.setChanIout_mA(2, 0)
ps.setChanIout_mA(3, 0)
for current in curList:
logger.info(f'Preparing data for {current=} in {ch=} ready')
ps.setChanIout_mA(ch, current)
trEIT = eitSweep(central_frequency, frequency_span, Np, Nsweeps=Nsweeps)
trEIT.plot()
fn = apparatus.getNextDataFile()
logger.info(f'Data ready for {current=} in {ch=}')
logger.info(f'Data saved to {fn=}')
trEIT.save(fn)
def calibrateCoilsCurrent():
Np=1000
Nsweeps=5
getCurrentCalibrationData(ch=1)
getCurrentCalibrationData(ch=2)
getCurrentCalibrationData(ch=3)
def rotateBandGetEITtrace():
Np=100
Nsweeps=1
B=50e-6 # earth magnetic field in Tesla (0.5 G)
phiStep = 5
thetaStep = 5
phiSet = range(0,90+phiStep, phiStep)
thetaSet = range(0,90+thetaStep, thetaStep)
for phi in phiSet:
for theta in thetaSet:
setBdegrees(B=B, theta=theta, phi=phi)
trEIT = eitSweep(central_frequency, frequency_span, Np, Nsweeps=Nsweeps)
fn = apparatus.getNextDataFile()
logger.info(f'Data ready for {B=} in {theta=} {phi=}')
logger.info(f'Data saved to {fn=}')
trEIT.save(fn)
central_frequency = 6.83468e9
frequency_span = 2500e3
dwellTime=0.1
Np=100
Nsweeps=1
tsdb_ingester.commit()
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