def init_KID(
Chipnum, KIDnum, Pread, Tbath, Teffmethod="GR", wvl=None, S21=False, SC_class=SC.Al
):
"""This returns an KID object, with the parameters initialized by
measurements on a physical KID. The effective temperature is set with an
lifetime measurement, either from GR noise (GR) or pulse (pulse)"""
TDparam = io.get_grTDparam(Chipnum)
S21data = io.get_S21data(Chipnum, KIDnum, Pread)
Qc = S21data[0, 3]
hw0 = S21data[0, 5] * const.Planck / const.e * 1e12 * 1e-6
kbT0 = const.Boltzmann / const.e * 1e6 * S21data[0, 1]
SC_inst = SC.init_SC(Chipnum, KIDnum, Pread, SC_class=SC_class)
ak1 = calc.ak(S21data, SC_inst)
if Teffmethod == "GR":
Temp = io.get_grTemp(TDparam, KIDnum, Pread)
taut = np.zeros(len(Temp))
for i in range(len(Temp)):
freq, SPR = io.get_grdata(TDparam, KIDnum, Pread, Temp[i])
taut[i] = calc.tau(freq, SPR)[0]
tauspl = interpolate.splrep(Temp[~np.isnan(taut)], taut[~np.isnan(taut)])
tau1 = interpolate.splev(Tbath, tauspl)
kbT = kidcalc.kbTbeff(tau1, SC_inst)
elif Teffmethod == "pulse":
peakdata_ph, peakdata_amp = io.get_pulsedata(Chipnum, KIDnum, Pread, Tbath, wvl)
tau1 = calc.tau_pulse(peakdata_ph)
kbT = kidcalc.kbTbeff(tau1, SC_inst)
elif Teffmethod == "Tbath":
kbT = Tbath * 1e-3 * const.Boltzmann / const.e * 1e6
if S21:
return S21KID(S21data, Qc=Qc, hw0=hw0, kbT0=kbT0, kbT=kbT, ak=ak1, SC=SC_inst)
else:
return KID(Qc=Qc, hw0=hw0, kbT0=kbT0, kbT=kbT, ak=ak1, SC=SC_inst)
def Respspl(Chipnum,
KIDnum,
Pread,
phasemethod="f0",
ampmethod="Qi",
var="cross"):
"""Returns a spline representation of the responsivity (amp, phase or cross) vs Temperature (K).
Arguments:
Chipnum,KIDnum,Pread -- define the data to be taken (S21data, pulse and/or noise).
phasemethod -- defines the method that is used for the responsivity calculation. Options:
f0 (default) - uses the f0 vs T from the S21-measurement.
crossnoise - uses noise PSDs: dTheta/dNqp = crossNL/sqrt(ampNL). (future)
ampmethod -- defines which method is used for the amplitude responsivity. Options:
Qi (default) - uses the 1/Qi fit in the S21-analysis, direct from S21 csv
pulse - computes dA/dTheta from pulses (minimal temp, wavelength) and
multiplies phase responsivity with it.
noise - computes dA/dTheta by dividing the amp and phase PSDs
from the noise measurement and multiplies the phase
responsivity with it (future).
crossnoise - computes dA/dNqp by dividing the crossPSD with sqrt(phasePSD)
(future)"""
S21data = io.get_S21data(Chipnum, KIDnum, Pread)
Temp = S21data[:, 1]
if phasemethod == "f0":
phaseResp = S21data[:, 10]
if ampmethod == "Qi":
ampResp = S21data[:, 18]
elif ampmethod == "pulse":
pulsePreadar = io.get_pulsePread(Chipnum, KIDnum)
pulsePreadselect = pulsePreadar[np.abs(pulsePreadar - Pread).argmin()]
pulseTemp = io.get_pulseTemp(Chipnum, KIDnum, pulsePreadselect).min()
pulsewvl = io.get_pulsewvl(Chipnum, KIDnum, pulsePreadselect,
pulseTemp).min()
phasepulse, amppulse = io.get_pulsedata(Chipnum, KIDnum,
pulsePreadselect, pulseTemp,
pulsewvl)
phtau = tau_pulse(phasepulse)
amptau = tau_pulse(amppulse)
assert (np.abs(1 - phtau / amptau) <
0.1), "Amp and Phase lifetimes differ by more than 10%"
dAdTheta = -1 * (amppulse / phasepulse)[600:int(600 +
2 * phtau)].mean()
ampResp = phaseResp * dAdTheta
if var == "cross":
Respspl = interpolate.splrep(Temp, np.sqrt(ampResp * phaseResp), s=0)
elif var == "amp":
Respspl = interpolate.splrep(Temp, ampResp, s=0)
elif var == "phase":
Respspl = interpolate.splrep(Temp, phaseResp, s=0)
else:
raise ValueError(f"'{var}' is not a valid variable")
return Respspl
def f0(Chipnum, KIDnum, Pread=None, ax=None):
"""Plots resonance frequency over temperature"""
S21data = io.get_S21data(Chipnum, KIDnum, Pread)
T = S21data[:, 1] * 1e3
if ax is None:
fig, ax = plt.subplots()
ax.plot(T, S21data[:, 5] * 1e-9)
ax.set_xlabel("Temperature (mK)")
ax.set_ylabel("$f_0$ (GHz)")
ax.ticklabel_format(useOffset=False)
def Qfactors(Chipnum, KIDnum, Pread=None, ax=None):
"""Plots Ql, Qi and Qc over temperature in one figure."""
S21data = io.get_S21data(Chipnum, KIDnum, Pread)
T = S21data[:, 1] * 1e3
if ax is None:
fig, ax = plt.subplots()
ax.plot(T, S21data[:, 2], label="$Q$")
ax.plot(T, S21data[:, 3], label="$Q_c$")
ax.plot(T, S21data[:, 4], label="$Q_i$")
ax.set_yscale("log")
ax.set_ylabel("Q-factor")
ax.set_xlabel("Temperature (mK)")
ax.legend()
def PowersvsT(Chipnum, KIDnum, density=False, phnum=False, fig=None, axs=None):
"""Plots the internal and absorbed powers over temperature, for different read powers (color).
Options:
Density -- the powers are devided by the superconductor volume
phnum -- the powers are expressed in resonator photon occupations"""
if axs is None or fig is None:
fig, axs = plt.subplots(1, 2, figsize=(10, 4))
Preadar = io.get_S21Pread(Chipnum, KIDnum)
cmap = matplotlib.cm.get_cmap("plasma")
norm = matplotlib.colors.Normalize(-1.05 * Preadar.max(),
-0.95 * Preadar.min())
clb = fig.colorbar(matplotlib.cm.ScalarMappable(norm=norm, cmap=cmap))
clb.ax.set_title(r"$P_{read}$ (dBm)")
for Pread in Preadar:
S21data = io.get_S21data(Chipnum, KIDnum, Pread)
Q = S21data[:, 2]
Qc = S21data[:, 3]
Qi = S21data[:, 4]
T = S21data[:, 1] * 1e3
Pabs = 10**(S21data[0, 7] / 10) / 2 * 4 * Q**2 / (Qi *
Qc) * 1e-3 / const.e
Pint = 10**(S21data[:, 8] / 10) * 1e-3 / const.e
if phnum:
Pabs /= const.Planck / const.e * 1e12 * (S21data[:, 5] * 1e-6)**2
Pint /= onst.Planck / const.e * 1e12 * (S21data[:, 5] * 1e-6)**2
if density:
Pabs /= S21data[0, 14]
Pint /= S21data[0, 14]
axs[1].plot(T, Pabs, color=cmap(norm(-1 * Pread)))
axs[0].plot(T, Pint, color=cmap(norm(-1 * Pread)))
title0 = "Internal Power"
title1 = "Absorbed Power"
if phnum:
ylabel = "$N_{\gamma}^{res}$"
else:
ylabel = "$eV~s^{-1}$"
if density:
ylabel += " $\mu m^{-3}$"
title0 += " Density"
title1 += " Density"
axs[0].set_title(title0)
axs[1].set_title(title1)
axs[0].set_ylabel(ylabel)
axs[0].set_yscale("log")
axs[1].set_yscale("log")
return fig, axs
def get_KIDparam(Chipnum,
KIDnum,
Pread,
plottesc=False,
tescPread='max',
tescrelerrthrs=.2):
S21data = io.get_S21data(Chipnum, KIDnum, Pread)
V = S21data[0, 14]
kbTc = S21data[0, 21] * 86.17
tesc = calc.tesc(Chipnum,
KIDnum,
pltkaplan=plottesc,
Pread=tescPread,
relerrthrs=tescrelerrthrs)
return V, kbTc, tesc
def tres(Chipnum, KIDnum, Pread=None, ax=None, label=None):
"""Plots the resonator ring-time as a function of temperature."""
S21data = io.get_S21data(Chipnum, KIDnum, Pread)
if ax is None:
fig, ax = plt.subplots()
ax.set_title(f"{Chipnum}, KID{KIDnum}, {S21data[0,7]} dBm")
T = S21data[:, 1] * 1e3
w = 2 * np.pi * S21data[:, 5] * 1e-6
Q = S21data[:, 2]
tres = 2 * Q / w
ax.plot(T, tres, label=label)
ax.set_xlabel("Temperature (mK)")
ax.set_ylabel(r"$\tau_{res}$ (µs)")
ax.set_yscale("log")
def Nphres(Chipnum, KIDnum, Pread=None, ax=None, label=None):
"""Plots the number of resonator photons in the resonator over temperature."""
S21data = io.get_S21data(Chipnum, KIDnum, Pread)
if ax is None:
fig, ax = plt.subplots()
ax.set_title(f"{Chipnum}, KID{KIDnum}, {S21data[0,7]} dBm")
T = S21data[:, 1] * 1e3
Pint = S21data[:, 8] # dBm
w = 2 * np.pi * S21data[:, 5] * 1e-6 # 1/µs
Nphres = 2 * np.pi * 10**(Pint / 10) / (const.hbar * 1e9 * w**2)
ax.plot(T, Nphres, label=label)
ax.set_xlabel("Temperature (mK)")
ax.set_ylabel("Number of photons")
ax.set_yscale("log")
def Nphabsres(Chipnum, KIDnum, Pread=None, ax=None, label=None):
"""Plots the number of absorbed resonator photons over temperature."""
S21data = io.get_S21data(Chipnum, KIDnum, Pread)
if ax is None:
fig, ax = plt.subplots()
ax.set_title(f"{Chipnum}, KID{KIDnum}, {S21data[0,7]} dBm")
Q = S21data[:, 2]
Qc = S21data[:, 3]
Qi = S21data[:, 4]
T = S21data[:, 1] * 1e3
Pabs = 10 * np.log(10**(S21data[0, 7] / 10) / 2 * 4 * Q**2 / (Qi * Qc))
w = 2 * np.pi * S21data[:, 5] * 1e-6 # 1/µs
Nphabsres = (2 * np.pi * 10**(Pabs / 10) / (const.hbar * 1e9 * w**2) *
S21data[0, 14])
ax.plot(T, Nphabsres, label=label)
# ax.plot(T,Pabs)
ax.set_xlabel("Temperature (mK)")
ax.set_ylabel("Absorbed photons per cycle")
ax.set_yscale("log")
def Powers(Chipnum, KIDnum, Pread=None, ax=None):
"""Plots the read power, internal power and absorbed power over temperature in one figure"""
S21data = io.get_S21data(Chipnum, KIDnum, Pread)
if ax is None:
fig, ax = plt.subplots()
ax.set_title("{}, KID{}, {} dBm".format(Chipnum, KIDnum, S21data[0,
7]))
Q = S21data[:, 2]
Qc = S21data[:, 3]
Qi = S21data[:, 4]
T = S21data[:, 1] * 1e3
ax.plot(T, S21data[:, 7], label="$P_{read}$")
ax.plot(T, S21data[:, 8], label="$P_{int}$")
ax.plot(
T,
10 * np.log10(10**(S21data[0, 7] / 10) / 2 * 4 * Q**2 / (Qi * Qc)),
label="$P_{abs}$",
)
ax.set_ylabel("Power (dBm)")
ax.set_xlabel("Temperature (mK)")
ax.legend()
def ltnlvl(
Chipnum,
KIDlist=None,
pltPread="all",
spec="cross",
Tminmax=None,
startstopf=(None, None),
lvlcomp="",
pltTTc=False,
delampNoise=False,
del1fNoise=False,
del1fnNoise=False,
suboffres=False,
relerrthrs=0.1,
pltKIDsep=True,
pltthlvl=False,
pltkaplan=False,
pltthmlvl=False,
plttres=False,
plttscat=False,
fig=None,
ax12=None,
color="Pread",
pltclrbar=True,
fmt="-o",
label=None,
SCvol=None,
SCkwargs={},
showfit=False,
savefig=False,
):
"""Plots the results from a Lorentzian fit to the PSDs of multiple KIDs, read powers and temperatures.
Two axes: 0: lifetimes 1: noise levels, both with temperature on the x-axis. The color can be specified and
is Pread by default.
Options:
startstopf -- defines the fitting window
lvlcomp -- defines how the levels are compensated. Use Resp for responsivity compensation.
(will be moved in the future)
del{}Noise -- filter spectrum before fitting.
relerrthrs -- only plot fits with a relative error threshold in lifetime less than this.
pltKIDsep -- if True, different KIDs get a new figure.
pltthlvl -- expected noise level is plotted as dashed line
pltkaplan -- a kaplan fit (tesc as parameter) is plotted in the lifetime axis.
pltthmfnl -- a noise level from the fitted lifetime and theoretical Nqp is plotted as well
plttres -- the resonator ring time is plotted in the lifetime axis.
... multiple figure handling options ...
... options for the tesc deteremination ...
showfit -- the fits are displayed in numerous new figures, for manual checking."""
def _make_fig():
fig, axs = plt.subplots(1, 2, figsize=(8, 3))
return fig, axs
def _get_cmap(**kwargs):
if color == "Pread":
cmap = matplotlib.cm.get_cmap("plasma")
norm = matplotlib.colors.Normalize(-1.05 * kwargs["Preadar"].max(),
-0.95 * kwargs["Preadar"].min())
if pltclrbar:
clb = fig.colorbar(
matplotlib.cm.ScalarMappable(norm=norm, cmap=cmap))
clb.ax.set_title(r"$P_{read}$ (dBm)")
elif color == "Pint":
cmap = matplotlib.cm.get_cmap("plasma")
norm = matplotlib.colors.Normalize(kwargs["Pintar"].min() * 1.05,
kwargs["Pintar"].max() * 0.95)
if pltclrbar:
clb = fig.colorbar(
matplotlib.cm.ScalarMappable(norm=norm, cmap=cmap))
clb.ax.set_title(r"$P_{int}$ (dBm)")
elif color == "V":
cmap = matplotlib.cm.get_cmap("cividis")
norm = matplotlib.colors.Normalize(
np.array(list(Vdict.values())).min(),
np.array(list(Vdict.values())).max(),
)
if pltclrbar:
clb = fig.colorbar(
matplotlib.cm.ScalarMappable(norm=norm, cmap=cmap))
clb.ax.set_title(r"Al Vol. ($\mu m^3$)")
elif color == "KIDnum":
cmap = matplotlib.cm.get_cmap("Paired")
norm = matplotlib.colors.Normalize(
np.array(KIDlist).min(),
np.array(KIDlist).max())
if pltclrbar:
clb = fig.colorbar(
matplotlib.cm.ScalarMappable(norm=norm, cmap=cmap))
clb.ax.set_title("KID nr.")
else:
raise ValueError(
"{} is not a valid variable as color".format(color))
return cmap, norm
TDparam = io.get_grTDparam(Chipnum)
if suboffres:
TDparamoffres = io.get_grTDparam(Chipnum, offres=True)
if KIDlist is None:
KIDlist = io.get_grKIDs(TDparam)
elif type(KIDlist) is int:
KIDlist = [KIDlist]
if color == "Pint":
Pintdict = io.get_Pintdict(Chipnum)
if not pltKIDsep:
if ax12 is None:
fig, axs = _make_fig()
else:
axs = ax12
if color == "Pint":
Pintar = np.array([Pintdict[k] for k in KIDlist])
cmap, norm = _get_cmap(Pintar=Pintar)
elif color == "V":
Vdict = io.get_Vdict(Chipnum)
cmap, norm = _get_cmap(Vdict=Vdict)
elif color == "Pread":
Preaddict = io.get_Preaddict(Chipnum)
Preadar = np.array([Preaddict[k] for k in KIDlist])
cmap, norm = _get_cmap(Preadar=Preadar)
elif color == "KIDnum":
cmap, norm = _get_cmap(KIDlist=KIDlist)
for KIDnum in KIDlist:
Preadar = _selectPread(pltPread, io.get_grPread(TDparam, KIDnum))
if pltKIDsep:
if ax12 is None:
fig, axs = _make_fig()
else:
axs = ax12
if len(KIDlist) > 1:
fig.suptitle(f"KID{KIDnum}")
if color == "Pread":
cmap, norm = _get_cmap(Preadar=Preadar)
elif color == "Pint":
cmap, norm = _get_cmap(Pintar=np.array(Pintdict[KIDnum]))
if lvlcomp != "" or pltkaplan or pltthmlvl or pltthlvl or pltTTc:
if SCvol is None:
SCvol = SuperCond.init_SCvol(Chipnum, KIDnum, **SCkwargs)
else:
SCvol = SuperCond.Vol(SuperCond.Al(), np.nan, np.nan)
for Pread in Preadar:
Temp = np.trim_zeros(io.get_grTemp(TDparam, KIDnum, Pread))
lvlcompspl = calc.NLcomp(Chipnum,
KIDnum,
Pread,
SCvol=SCvol,
method=lvlcomp,
var=spec)
if suboffres:
Temp = np.intersect1d(
Temp, io.get_grTemp(TDparamoffres, KIDnum, Pread))
if Tminmax is not None:
if Tminmax[0] is not None:
Temp = Temp[Temp > Tminmax[0]]
if Tminmax[1] is not None:
Temp = Temp[Temp < Tminmax[1]]
taut = np.zeros((len(Temp)))
tauterr = np.zeros((len(Temp)))
lvl = np.zeros((len(Temp)))
lvlerr = np.zeros((len(Temp)))
for i in range(len(Temp)):
freq, SPR = io.get_grdata(TDparam, KIDnum, Pread, Temp[i],
spec)
if suboffres:
orfreq, orSPR = io.get_grdata(TDparamoffres, KIDnum, Pread,
Temp[i], spec)
freq, SPR = filters.subtr_spec(freq, SPR, orfreq, orSPR)
if delampNoise:
freq, SPR = filters.del_ampNoise(freq, SPR)
if del1fNoise:
freq, SPR = filters.del_1fNoise(freq, SPR)
if del1fnNoise:
freq, SPR = filters.del_1fnNoise(freq, SPR)
if showfit:
print("{}, KID{}, -{} dBm, T={}, {}".format(
Chipnum, KIDnum, Pread, Temp[i], spec))
taut[i], tauterr[i], lvl[i], lvlerr[i] = calc.tau(
freq,
SPR,
plot=showfit,
retfnl=True,
startf=startstopf[0],
stopf=startstopf[1],
)
if showfit:
print(tauterr[i] / taut[i])
lvl[i] = lvl[i] / interpolate.splev(Temp[i] * 1e-3, lvlcompspl)
lvlerr[i] = lvlerr[i] / interpolate.splev(
Temp[i] * 1e-3, lvlcompspl)
# Deleting bad fits and plotting:
mask = ~np.isnan(taut)
mask[mask] = tauterr[mask] / taut[mask] <= relerrthrs
if color == "Pread":
clr = cmap(norm(-1 * Pread))
elif color == "Pint":
clr = cmap(norm(Pint))
elif color == "V":
clr = cmap(norm(Vdict[KIDnum]))
elif color == "KIDnum":
clr = cmap(norm(KIDnum))
else:
clr = color
if pltTTc:
Temp = Temp / (SCvol.SC.kbTc /
(const.Boltzmann / const.e * 1e6) * 1e3)
axs[0].errorbar(
Temp[mask],
taut[mask],
yerr=tauterr[mask],
fmt=fmt,
capsize=3.0,
color=clr,
mec="k",
label=label if Pread == Preadar[-1] else "",
)
axs[1].errorbar(
Temp[mask],
10 * np.log10(lvl[mask]),
yerr=10 * np.log10((lvlerr[mask] + lvl[mask]) / lvl[mask]),
fmt=fmt,
capsize=3.0,
color=clr,
mec="k",
label=label if Pread == Preadar[-1] else "",
)
if pltthlvl:
if Tminmax is not None and not pltTTc:
Tstartstop = Tminmax
else:
Tstartstop = (Temp[mask].min(), Temp[mask].max())
Ttemp = np.linspace(*Tstartstop, 100)
if pltTTc:
Ttemp = Ttemp * (SCvol.SC.kbTc /
(const.Boltzmann / const.e * 1e6) * 1e3)
explvl = (interpolate.splev(
Ttemp * 1e-3, calc.Respspl(Chipnum,
KIDnum,
Pread,
var=spec))**2)
explvl *= (4 * SCvol.SC.t0 * 1e-6 * SCvol.V * SCvol.SC.N0 *
(SCvol.SC.kbTc)**3 / (2 * (SCvol.SC.D0)**2) *
(1 + SCvol.tesc / SCvol.SC.tpb) / 2)
explvl /= interpolate.splev(Ttemp * 1e-3, lvlcompspl)
if pltTTc:
Ttemp = Ttemp / (SCvol.SC.kbTc /
(const.Boltzmann / const.e * 1e6) * 1e3)
(thlvlplot, ) = axs[1].plot(
Ttemp,
10 * np.log10(explvl),
color=clr,
linestyle="--",
linewidth=2.0,
)
axs[1].legend((thlvlplot, ), (r"Expected noise level", ))
if pltkaplan and Temp[mask].size != 0:
if Tminmax is not None and not pltTTc:
Tstartstop = Tminmax
else:
Tstartstop = (Temp[mask].min(), Temp[mask].max())
T = np.linspace(*Tstartstop, 100)
if pltTTc:
T = T * (SCvol.SC.kbTc / (const.Boltzmann / const.e * 1e6))
else:
T = T * 1e-3
taukaplan = kidcalc.tau_kaplan(T, SCvol)
if pltTTc:
T = T / (SCvol.SC.kbTc / (const.Boltzmann / const.e * 1e6))
else:
T = T * 1e3
axs[0].plot(
T,
taukaplan,
color=clr,
linestyle="--",
linewidth=2.0,
label="Kaplan, $\\tau_{qp}$",
)
if plttscat:
if Tminmax is not None:
Tstartstop = Tminmax
else:
Tstartstop = (Temp[mask].min(), Temp[mask].max())
T = np.linspace(*Tstartstop, 100)
if pltTTc:
T = T * (SCvol.SC.kbTc / (const.Boltzmann / const.e * 1e6))
else:
T = T * 1e-3
tscat = SCvol.SC.t0 / (
2.277 * (SCvol.SC.kbTc / (2 * SCvol.SC.D0))**0.5 *
(T / (SCvol.SC.kbTc /
(const.Boltzmann / const.e * 1e6)))**(7 / 2))
if pltTTc:
T = T / (SCvol.SC.kbTc / (const.Boltzmann / const.e * 1e6))
else:
T = T * 1e3
axs[0].plot(
T,
tscat,
color=clr,
linestyle="-.",
linewidth=2.0,
label="Kaplan, $\\tau_s$",
)
if pltthmlvl:
try:
if pltTTc:
Temp = Temp * (SCvol.SC.kbTc /
(const.Boltzmann / const.e * 1e6) * 1e3)
tauspl = interpolate.splrep(Temp[mask], taut[mask], s=0)
T = np.linspace(Temp[mask].min(), Temp[mask].max(), 100)
Nqp = np.zeros(len(T))
for i in range(len(T)):
Nqp[i] = SCvol.V * kidcalc.nqp(
T[i] * 1e-3 * const.Boltzmann / const.e * 1e6,
SCvol.D0,
SCvol.SC,
)
thmfnl = (
4 * interpolate.splev(T, tauspl) * 1e-6 * Nqp *
interpolate.splev(
T * 1e-3,
calc.Respspl(Chipnum, KIDnum, Pread, var=spec))**2)
thmfnl /= interpolate.splev(T * 1e-3, lvlcompspl)
if pltTTc:
T = T / (SCvol.SC.kbTc /
(const.Boltzmann / const.e * 1e6) * 1e3)
(thmfnlplot, ) = axs[1].plot(
T,
10 * np.log10(thmfnl),
color=clr,
linestyle="--",
linewidth=3.0,
)
axs[1].legend(
(thmfnlplot, ),
("Thermal Noise Level \n with measured $\\tau_{qp}^*$",
),
)
except:
warnings.warn(
"Could not make Thermal Noise Level, {},KID{},-{} dBm,{}"
.format(Chipnum, KIDnum, Pread, spec))
if plttres:
S21data = io.get_S21data(Chipnum, KIDnum, Pread)
(tresline, ) = axs[0].plot(
S21data[:, 1] /
S21data[0, 21] if pltTTc else S21data[:, 1] * 1e3,
S21data[:, 2] / (np.pi * S21data[:, 5]) * 1e6,
color=clr,
linestyle=":",
)
axs[0].legend((tresline, ), ("$\\tau_{res}$", ))
axs[0].set_yscale("log")
for i in range(2):
if pltTTc:
axs[i].set_xlabel("$T/T_c$")
else:
axs[i].set_xlabel("Temperature (mK)")
axs[0].set_ylabel(r"$\tau_{qp}^*$ (µs)")
if lvlcomp == "Resp":
axs[1].set_ylabel(r"Noise Level/$\mathcal{R}^2(T)$ (dB/Hz)")
elif lvlcomp == "RespV":
axs[1].set_ylabel(r"Noise Level/$(\mathcal{R}^2(T)V)$ (dB/Hz)")
elif lvlcomp == "RespVtescTc":
axs[1].set_ylabel(r"Noise Level/$(\mathcal{R}^2(T)\chi)$ (dB/Hz)")
elif lvlcomp == "":
axs[1].set_ylabel(r"Noise Level (dB/Hz)")
elif lvlcomp == "RespLowT":
axs[1].set_ylabel(r"Noise Level/$\mathcal{R}^2(T=50 mK)$ (dB/Hz)")
else:
axs[1].set_ylabel(r"comp. Noise Level (dB/Hz)")
plt.tight_layout()
if savefig:
plt.savefig("GR_{}_KID{}_{}.pdf".format(Chipnum, KIDnum, spec))
plt.close()
if ax12 is None:
return fig, axs
def tesc(Chipnum,
KIDnum,
Pread='max',
minTemp=200,
maxTemp=400,
taunonkaplan=2e2,
taures=1e1,
relerrthrs=.2,
pltfit=False,
pltkaplan=False,
reterr=False,
t0=.44,
kb=86.17,
tpb=.28e-3,
N0=1.72e4,
kbTD=37312.0,
defaulttesc=0):
'''Calculates the phonon escape time from the GR noise lifetimes and Kaplan.
Uses data at Pread (default max), and temperatures between minTemp,maxTemp
(default (300,400)). Only lifetimes between taunonkaplan and taures, and with
a relative error threshold of relerrthrs are considered.
The remaining lifetimes, tesc is calculated and averaged. The error (optional return)
is the variance of the remaining lifetimes. If this fails, defaulttesc is returned.'''
TDparam = io.get_grTDparam(Chipnum)
Pread = _selectPread(Pread, io.get_grPread(TDparam, KIDnum))[0]
kbTc = io.get_S21data(Chipnum, KIDnum,
io.get_S21Pread(Chipnum, KIDnum)[0])[0, 21] * kb
Temp = io.get_grTemp(TDparam, KIDnum, Pread)
Temp = Temp[np.logical_and(Temp < maxTemp, Temp > minTemp)]
tescar, tescarerr, tqpstar, tqpstarerr = np.zeros((4, len(Temp)))
for i in range(len(Temp)):
if pltfit:
print('{} KID{} -{} dBm T={} mK'.format(Chipnum, KIDnum, Pread,
Temp[i]))
freq, SPR = io.get_grdata(TDparam, KIDnum, Pread, Temp[i])
tqpstar[i], tqpstarerr[i] = tau(freq, SPR, plot=pltfit)
if tqpstarerr[i]/tqpstar[i] > relerrthrs or \
(tqpstar[i] > taunonkaplan or tqpstar[i] < taures):
tescar[i] = np.nan
else:
tescar[i] = kidcalc.tesc(kb * Temp[i] * 1e-3, tqpstar[i], t0, tpb,
N0, kbTc, kbTD)
tescarerr[i] = np.abs(
kidcalc.tesc(kb * Temp[i] *
1e-3, tqpstarerr[i], t0, tpb, N0, kbTc, kbTD) +
tpb)
if tescar[~np.isnan(tescar)].size > 0:
tesc1 = np.mean(tescar[~np.isnan(tescar)])
tescerr = np.sqrt(
np.std(tescar[~np.isnan(tescar)])**2 +
((tescarerr[~np.isnan(tescar)] /
(~np.isnan(tescar)).sum())**2).sum())
else:
tesc1 = np.nan
if tesc1 < 0 or np.isnan(tesc1) or tesc1 > 1e-2:
warnings.warn(
'tesc ({}) is not valid and set to {} µs. {}, KID{}'.format(
tesc1, defaulttesc, Chipnum, KIDnum))
tesc1 = defaulttesc
if pltkaplan:
plt.figure()
plt.errorbar(Temp, tqpstar, yerr=tqpstarerr, capsize=5., fmt='o')
mask = ~np.isnan(tescar)
plt.errorbar(Temp[mask], tqpstar[mask], fmt='o')
try:
T = np.linspace(Temp[~np.isnan(tqpstar)].min(),
Temp[~np.isnan(tqpstar)].max(), 100)
except ValueError:
T = np.linspace(minTemp, maxTemp, 100)
taukaplan = kidcalc.tau_kaplan(T * 1e-3, tesc=tesc1, kbTc=kbTc)
plt.plot(T, taukaplan)
plt.yscale('log')
plt.ylim(None, 1e4)
plt.xlabel('T (mK)')
plt.ylabel(r'$\tau_{qp}^*$ (µs)')
plt.legend(['Kaplan', 'GR Noise Data', 'Selected Data'])
plt.show()
plt.close()
if reterr:
return tesc1, tescerr
else:
return tesc1
def tesc(
Chipnum,
KIDnum,
SCvol=None,
usePread="max",
minTemp=200,
maxTemp=400,
taunonkaplan=2e2,
taures=1e1,
relerrthrs=0.2,
pltfit=False,
pltkaplan=False,
reterr=False,
defaulttesc=0,
):
"""Calculates the phonon escape time from the GR noise lifetimes and Kaplan.
Uses data at Pread (default max), and temperatures between minTemp,maxTemp
(default (200,400)). Only lifetimes between taunonkaplan and taures, and with
a relative error threshold of relerrthrs are considered.
The remaining lifetimes, tesc is calculated and averaged. The error (optional return)
is the variance of the remaining lifetimes. If this fails, defaulttesc is returned."""
TDparam = io.get_grTDparam(Chipnum)
Pread = _selectPread(usePread, io.get_grPread(TDparam, KIDnum))[0]
if SCvol is None:
S21data = io.get_S21data(Chipnum, KIDnum)
SCvol = SuperCond.Volume(SuperCond.Al(Tc=S21data[0, 21]),
V=S21data[0, 14],
d=S21data[0, 25])
Temp = io.get_grTemp(TDparam, KIDnum, Pread)
Temp = Temp[np.logical_and(Temp < maxTemp, Temp > minTemp)]
tescar, tescarerr, tqpstar, tqpstarerr = np.zeros((4, len(Temp)))
for i in range(len(Temp)):
if pltfit:
print("{} KID{} -{} dBm T={} mK".format(Chipnum, KIDnum, Pread,
Temp[i]))
freq, SPR = io.get_grdata(TDparam, KIDnum, Pread, Temp[i])
tqpstar[i], tqpstarerr[i] = tau(freq, SPR, plot=pltfit)
if tqpstarerr[i] / tqpstar[i] > relerrthrs or (
tqpstar[i] > taunonkaplan or tqpstar[i] < taures):
tescar[i] = np.nan
else:
tescar[i] = kidcalc.tesc(
const.Boltzmann / const.e * 1e6 * Temp[i] * 1e-3, tqpstar[i],
SCvol.SC)
tescarerr[i] = np.abs(
kidcalc.tesc(const.Boltzmann / const.e * 1e6 * Temp[i] *
1e-3, tqpstarerr[i], SCvol.SC) + SCvol.SC.tpb)
if tescar[~np.isnan(tescar)].size > 0:
tesc1 = np.mean(tescar[~np.isnan(tescar)])
tescerr = np.sqrt(
np.std(tescar[~np.isnan(tescar)])**2 +
((tescarerr[~np.isnan(tescar)] /
(~np.isnan(tescar)).sum())**2).sum())
else:
tesc1 = np.nan
if tesc1 < 0 or np.isnan(tesc1) or tesc1 > 1e-2:
warnings.warn(
"tesc ({}) is not valid and set to {} µs. {}, KID{}".format(
tesc1, defaulttesc, Chipnum, KIDnum))
tesc1 = defaulttesc
tescerr = 0
SCvol.tesc = tesc1
if pltkaplan:
plt.figure()
plt.errorbar(Temp, tqpstar, yerr=tqpstarerr, capsize=5.0, fmt="o")
mask = ~np.isnan(tescar)
plt.errorbar(Temp[mask], tqpstar[mask], fmt="o")
try:
T = np.linspace(Temp[~np.isnan(tqpstar)].min(),
Temp[~np.isnan(tqpstar)].max(), 100)
except ValueError:
T = np.linspace(minTemp, maxTemp, 100)
taukaplan = kidcalc.tau_kaplan(T * 1e-3, SCvol)
plt.plot(T, taukaplan)
plt.yscale("log")
plt.ylim(None, 1e4)
plt.xlabel("T (mK)")
plt.ylabel(r"$\tau_{qp}^*$ (µs)")
plt.legend(["Kaplan", "GR Noise Data", "Selected Data"])
plt.show()
plt.close()
if reterr:
return tesc1, tescerr
else:
return tesc1
def NLcomp(Chipnum, KIDnum, Pread, SCvol=None, method="", var="cross"):
"""Returns a spline representation of a Noise Level (non-dB) vs Temperature (K),
with which the measured noise level can be compensated. For example,
the method \'Resp\' gives the responsivity squared. If the measured
noise level is divided by the responsivity squared, one is left with
the quasiparticle fluctuation level.
Arguments:
Chipnum, KIDnum, Pread -- define which data is to be used (S21data and/or pulse data)
SCvol -- a Volume object (see SC module), which defines superconductor properties
method -- defines which level is to be returned. See if statements in the function for the options.
(future: multiply every individual method stated in the method string)
var -- gives the type of PSD to be compensated - cross, amp or phase - and is used
if \'Reps\' is in the method """
if SCvol is None and method != "":
S21data = io.get_S21data(Chipnum, KIDnum, Pread)
SCvol = SuperCond.Volume(SuperCond.Al(Tc=S21data[0, 21]),
V=S21data[0, 14],
d=S21data[0, 25])
if method != "":
S21data = io.get_S21data(Chipnum, KIDnum, Pread)
if "ak" in method:
akin = ak(S21data)
if method == "QakV":
lvlcompspl = interpolate.splrep(
S21data[:, 1], (S21data[:, 2] * akin)**2 / SCvol.V**2, s=0)
elif method == "QaksqrtV":
lvlcompspl = interpolate.splrep(
S21data[:, 1], (S21data[:, 2] * akin)**2 / (SCvol.V), s=0)
elif method == "QaksqrtVtesc":
lvlcompspl = interpolate.splrep(
S21data[:, 1],
(S21data[:, 2] * akin)**2 / (SCvol.V *
(1 + SCvol.tesc / SCvol.SC.tpb)),
s=0,
)
elif method == "QaksqrtVtescTc":
lvlcompspl = interpolate.splrep(
S21data[:, 1],
(S21data[:, 2] * akin)**2 /
(SCvol.V * (1 + SCvol.tesc / SCvol.SC.tpb) *
(const.Boltzmann / const.e * 1e6 * S21data[0, 21])**3 /
(SCvol.SC.D0 / const.e * 1e6)**2),
s=0,
)
elif method == "Resp":
lvlcompspl = interpolate.splrep(
S21data[:, 1],
interpolate.splev(S21data[:, 1],
Respspl(Chipnum, KIDnum, Pread, var=var))**2,
)
elif method == "RespPulse":
lvlcompspl = interpolate.splrep(
S21data[:, 1],
interpolate.splev(
S21data[:, 1],
Respspl(Chipnum, KIDnum, Pread, ampmethod="pulse",
var=var),
)**2,
)
elif method == "RespPint":
Pint = 10**(-Pread / 10) * S21data[:,
2]**2 / (S21data[:, 3] * np.pi)
Pint /= Pint[0]
lvlcompspl = interpolate.splrep(
S21data[:, 1],
interpolate.splev(S21data[:, 1],
Respspl(Chipnum, KIDnum, Pread, var=var)) /
Pint**(1 / 2),
s=0,
)
elif method == "RespV":
lvlcompspl = interpolate.splrep(
S21data[:, 1],
interpolate.splev(S21data[:, 1],
Respspl(Chipnum, KIDnum, Pread, var=var)) *
SCvol.V,
s=0,
)
elif method == "RespVtescTc":
kbTc = const.Boltzmann / const.e * 1e6 * S21data[0, 21]
lvlcompspl = interpolate.splrep(
S21data[:, 1],
interpolate.splev(S21data[:, 1],
Respspl(Chipnum, KIDnum, Pread, var=var)) *
SCvol.V * (1 + SCvol.tesc / SCvol.tpb) * (kbTc)**3 /
(kidcalc.D(const.Boltzmann / const.e * 1e6 * S21data[:, 1],
SCvol.SC))**2,
s=0,
)
elif method == "RespLowT":
lvlcompspl = interpolate.splrep(
S21data[:, 1],
np.ones(len(S21data[:, 1])) * interpolate.splev(
S21data[0, 1], Respspl(Chipnum, KIDnum, Pread, var=var)),
)
elif method == "Resptres":
lvlcompspl = interpolate.splrep(
S21data[:, 1],
interpolate.splev(S21data[:, 1],
Respspl(Chipnum, KIDnum, Pread, var=var))**2
* (1 + (S21data[:, 1] * 2 * S21data[:, 2] / S21data[:, 5])**2),
)
else:
raise ValueError(
"{} is an invalid compensation method".format(method))
Pint = 10 * np.log10(
10**(-1 * Pread / 10) * S21data[0, 2]**2 / S21data[0, 3] / np.pi)
else:
lvlcompspl = interpolate.splrep(np.linspace(0.01, 10, 10), np.ones(10))
return lvlcompspl
def spec(
Chipnum,
KIDlist=None,
pltPread="all",
spec="all",
lvlcomp="",
SCvol=None,
SCkwargs={},
clbar=True,
cmap=None,
norm=None,
del1fNoise=False,
delampNoise=False,
del1fnNoise=False,
suboffres=False,
plttres=False,
Tminmax=(0, 500),
ax12=None,
xlim=(None, None),
ylim=(None, None),
):
"""Plots PSDs of multiple KIDs, read powers and temperatures (indicated by color). Every KID has a new figure, which is returned if only one KID is plotted.
lvlcomp specifies how the noise levels should be compensated (will be a different function in the future).
Use Resp to divide by responsivity and obtain quasiparticle fluctuations.
Use Resptres to compensate for the factor (1+(omega*taures)^2) and get the quasiparticle fluctuations.
plttres will plot arrow at the frequencies corresponding to the resonator ring time."""
TDparam = io.get_grTDparam(Chipnum)
if suboffres:
TDparamoffres = io.get_grTDparam(Chipnum, offres=True)
if KIDlist is None:
KIDlist = io.get_grKIDs(TDparam)
elif type(KIDlist) is int:
KIDlist = [KIDlist]
if spec == "all":
specs = ["cross", "amp", "phase"]
elif type(spec) == list:
specs = spec
else:
raise ValueError("Invalid Spectrum Selection")
for KIDnum in KIDlist:
if lvlcomp != "":
if SCvol is None:
SCvol = SuperCond.init_SCvol(Chipnum, KIDnum, **SCkwargs)
else:
SCvol = SuperCond.Vol(SuperCond.Al(), np.nan, np.nan)
Preadar = _selectPread(pltPread, io.get_grPread(TDparam, KIDnum))
if ax12 is None:
fig, axs = plt.subplots(
len(Preadar),
len(specs),
figsize=(4 * len(specs), 4 * len(Preadar)),
sharex=True,
sharey=True,
squeeze=False,
)
fig.suptitle(f"{Chipnum}, KID{KIDnum}")
else:
axs = ax12
for ax1, Pread in zip(range(len(Preadar)), Preadar):
axs[ax1, 0].set_ylabel("PSD (dBc/Hz)")
Temp = io.get_grTemp(TDparam, KIDnum, Pread)
if suboffres:
Temp = np.intersect1d(
Temp, io.get_grTemp(TDparamoffres, KIDnum, Pread))
Temp = Temp[np.logical_and(Temp < Tminmax[1], Temp > Tminmax[0])]
if cmap is None or norm is None:
cmap = matplotlib.cm.get_cmap("viridis")
norm = matplotlib.colors.Normalize(Temp.min(), Temp.max())
if clbar:
clb = plt.colorbar(matplotlib.cm.ScalarMappable(norm=norm,
cmap=cmap),
ax=axs[ax1, -1])
clb.ax.set_title("T (mK)")
if plttres:
S21data = io.get_S21data(Chipnum, KIDnum, Pread)
for i in range(len(Temp)):
for (ax2, spec) in zip(range(len(specs)), specs):
lvlcompspl = calc.NLcomp(Chipnum,
KIDnum,
Pread,
SCvol=SCvol,
method=lvlcomp,
var=spec)
freq, SPR = io.get_grdata(TDparam,
KIDnum,
Pread,
Temp[i],
spec=spec)
if suboffres:
orfreq, orSPR = io.get_grdata(TDparamoffres,
KIDnum,
Pread,
Temp[i],
spec=spec)
freq, SPR = filters.subtr_spec(freq, SPR, orfreq,
orSPR)
if delampNoise:
freq, SPR = filters.del_ampNoise(freq, SPR)
if del1fNoise:
freq, SPR = filters.del_1fNoise(freq, SPR)
if del1fnNoise:
freq, SPR = filters.del_1fnNoise(freq, SPR)
SPR[SPR == -140] = np.nan
SPR[SPR == -np.inf] = np.nan
SPR = 10 * np.log10(10**(SPR / 10) / interpolate.splev(
Temp[i] * 1e-3, lvlcompspl))
axs[ax1, ax2].plot(freq, SPR, color=cmap(norm(Temp[i])))
axs[ax1, ax2].set_xscale("log")
axs[ax1, ax2].set_title(spec + ", -{} dBm".format(Pread))
axs[-1, ax2].set_xlabel("Freq. (Hz)")
if plttres:
Tind = np.abs(S21data[:, 1] - Temp[i] * 1e-3).argmin()
fres = S21data[Tind, 5] / (2 * S21data[Tind, 2])
axs[ax1,
ax2].annotate("", (fres, 1), (fres, 1.25),
arrowprops=dict(arrowstyle="simple",
color=cmap(
norm(Temp[i])),
ec="k"),
annotation_clip=False,
xycoords=('data', 'axes fraction'))
axs[0, 0].set_xlim(*xlim)
axs[0, 0].set_ylim(*ylim)
# plt.tight_layout()
if ax12 is None and len(KIDlist) == 1:
return fig, axs
def Nqp(
Chipnum,
KIDnum,
pltPread="all",
spec="cross",
startstopf=(None, None),
delampNoise=False,
del1fNoise=False,
del1fnNoise=False,
Tminmax=None,
relerrthrs=0.3,
pltThrm=True,
pltNqpQi=False,
splitT=0,
pltNqptau=False,
SCvol=None,
SCkwargs={},
nqpaxis=True,
fig=None,
ax=None,
label=None,
color=None,
fmt="-o",
):
"""Plots the number of quasiparticle calculated from the noise levels and lifetimes from PSDs.
options similar to options in ltnlvl.
pltThrm -- also plot thermal line (needs constants)
pltNqpQi -- plot Nqp from Qi as well (needs constants)
splitT -- makes NqpQi line dashed below this T
pltNqptau -- plot Nqp from lifetime only (need constants)
nqpaxis -- also shows density on right axis."""
TDparam = io.get_grTDparam(Chipnum)
if ax is None:
fig, ax = plt.subplots()
Preadar = _selectPread(pltPread, io.get_grPread(TDparam, KIDnum))
if Preadar.size > 1:
cmap = matplotlib.cm.get_cmap("plasma")
norm = matplotlib.colors.Normalize(-1.05 * Preadar.max(),
-0.95 * Preadar.min())
clb = fig.colorbar(matplotlib.cm.ScalarMappable(norm=norm, cmap=cmap),
ax=ax)
clb.ax.set_title(r"$P_{read}$ (dBm)")
if SCvol is None:
SCvol = SuperCond.init_SCvol(Chipnum,
KIDnum,
set_tesc=pltNqptau,
**SCkwargs)
for Pread in Preadar:
S21data = io.get_S21data(Chipnum, KIDnum, Pread)
Respspl = calc.Respspl(Chipnum, KIDnum, Pread, var=spec)
Temp = io.get_grTemp(TDparam, KIDnum, Pread)
if Tminmax is not None:
if Tminmax[0] is not None:
Temp = Temp[Temp > Tminmax[0]]
if Tminmax[1] is not None:
Temp = Temp[Temp < Tminmax[1]]
Nqp, Nqperr, taut = np.zeros((3, len(Temp)))
for i in range(len(Temp)):
freq, SPR = io.get_grdata(TDparam,
KIDnum,
Pread,
Temp[i],
spec=spec)
if delampNoise:
freq, SPR = filters.del_ampNoise(freq, SPR)
if del1fNoise:
freq, SPR = filters.del_1fNoise(freq, SPR)
if del1fnNoise:
freq, SPR = filters.del_1fnNoise(freq, SPR)
taut[i], tauterr, lvl, lvlerr = calc.tau(freq,
SPR,
retfnl=True,
startf=startstopf[0],
stopf=startstopf[1])
lvl = lvl / interpolate.splev(Temp[i] * 1e-3, Respspl)**2
lvlerr = lvlerr / interpolate.splev(Temp[i] * 1e-3, Respspl)**2
Nqp[i] = lvl / (4 * taut[i] * 1e-6)
Nqperr[i] = np.sqrt((lvlerr / (4 * taut[i] * 1e-6))**2 +
(-lvl * tauterr * 1e-6 /
(4 * (taut[i] * 1e-6)**2))**2)
mask = ~np.isnan(Nqp)
mask[mask] = Nqperr[mask] / Nqp[mask] <= relerrthrs
if color is None:
if Preadar.size > 1:
color = cmap(norm(-1 * Pread))
elif pltPread == "min":
color = "purple"
elif pltPread == "max":
color = "gold"
dataline = ax.errorbar(
Temp[mask],
Nqp[mask],
yerr=Nqperr[mask],
color=color,
fmt=fmt,
mec="k",
capsize=2.0,
label=label,
)
if pltNqptau:
Nqp_ = SCvol.V * kidcalc.nqpfromtau(taut, SCvol)
(tauline, ) = ax.plot(
Temp[mask],
Nqp_[mask],
color=color,
zorder=len(ax.lines) + 1,
label="$\\tau_{qp}^*$",
)
if pltNqpQi:
Preadar = io.get_S21Pread(Chipnum, KIDnum)
for Pread in Preadar:
S21data = io.get_S21data(Chipnum, KIDnum, Pread)
T, Nqp = calc.NqpfromQi(S21data, SC=SCvol.SC)
mask = np.logical_and(T * 1e3 > ax.get_xlim()[0],
T * 1e3 < ax.get_xlim()[1])
totalT = T[mask]
totalNqp = Nqp[mask]
if len(Preadar) == 1:
color = "g"
else:
color = cmap(norm(closestPread))
(Qline, ) = ax.plot(
totalT[totalT > splitT] * 1e3,
totalNqp[totalT > splitT],
linestyle="-",
color=color,
zorder=len(ax.lines) + 1,
label="$Q_i$",
)
ax.plot(
totalT[totalT < splitT] * 1e3,
totalNqp[totalT < splitT],
linestyle="--",
color=color,
zorder=len(ax.lines) + 1,
)
if pltThrm:
T = np.linspace(*ax.get_xlim(), 100)
NqpT = np.zeros(100)
for i in range(len(T)):
D_ = kidcalc.D(const.Boltzmann / const.e * 1e6 * T[i] * 1e-3,
SCvol.SC)
NqpT[i] = SCvol.V * kidcalc.nqp(
const.Boltzmann / const.e * 1e6 * T[i] * 1e-3, D_, SCvol.SC)
(Thline, ) = ax.plot(T,
NqpT,
color="k",
zorder=len(ax.lines) + 1,
label="Thermal $N_{qp}$")
handles, labels = ax.get_legend_handles_labels()
by_label = dict(zip(labels, handles))
ax.legend(by_label.values(), by_label.keys())
ax.set_ylabel("$N_{qp}$")
ax.set_xlabel("Temperature (mK)")
ax.set_yscale("log")
if nqpaxis:
def nqptoNqp(x):
return x * SCvol.V
def Nqptonqp(x):
return x / SCvol.V
ax2 = ax.secondary_yaxis("right", functions=(Nqptonqp, nqptoNqp))
ax2.set_ylabel("$n_{qp}$ ($\\mu m^{-3}$)")
if Preadar.size > 1:
l, b, w, h = clb.ax.get_position().bounds
clb.ax.set_position([l + 0.12, b, w, h])
def Qif0(
Chipnum,
KIDnum,
color="Pread",
Tmax=0.5,
pltPread="all",
fracfreq=False,
fig=None,
ax12=None,
xaxis="T",
**kwargs,
):
"""Plot the internal quality factor and resonance frequency from S21-measurement.
The color gives different read powers, but can be set to Pint as well.
If fracfreq is True, the y-axis is df/f0, instead of f0."""
dfld = io.get_datafld()
if fig is None or ax12 is None:
fig, axs = plt.subplots(1, 2, figsize=(12, 4))
fig.suptitle(f"{Chipnum}, KID{KIDnum}")
else:
axs = ax12
Preadar = _selectPread(pltPread, io.get_S21Pread(Chipnum, KIDnum))
if color == "Pread":
cmap = matplotlib.cm.get_cmap("plasma")
norm = matplotlib.colors.Normalize(-1.05 * Preadar.max(),
-0.95 * Preadar.min())
clb = fig.colorbar(matplotlib.cm.ScalarMappable(norm=norm, cmap=cmap))
clb.ax.set_title(r"$P_{read}$ (dBm)")
elif color == "Pint":
Pint = np.array(io.get_Pintdict(Chipnum)[KIDnum])
cmap = matplotlib.cm.get_cmap("plasma")
norm = matplotlib.colors.Normalize(Pint.min() * 1.05,
Pint.max() * 0.95)
clb = fig.colorbar(matplotlib.cm.ScalarMappable(norm=norm, cmap=cmap))
clb.ax.set_title(r"$P_{int}$ (dBm)")
for Pread in Preadar:
S21data = io.get_S21data(Chipnum, KIDnum, Pread)
if color == "Pread":
clr = cmap(norm(-Pread))
elif color == "Pint":
clr = cmap(norm(Pint[Preadar == Pread][0]))
else:
clr = color
T = S21data[:, 1]
# set what will be on the x and y axis
if xaxis == "T":
xvalues = T * 1e3
yvaluesQ = S21data[:, 4]
elif xaxis == "Nqp":
xvalues = S21data[:, 12]
yvaluesQ = 1 / S21data[:, 4]
else:
raise ValueError("Not a valid xaxis argument")
axs[0].plot(xvalues[T < Tmax], yvaluesQ[T < Tmax], color=clr, **kwargs)
if fracfreq:
axs[1].plot(
xvalues[T < Tmax],
(S21data[T < Tmax, 5] - S21data[0, 5]) / S21data[0, 5],
color=clr,
**kwargs,
)
else:
axs[1].plot(xvalues[T < Tmax],
S21data[T < Tmax, 5] * 1e-9,
color=clr,
**kwargs)
for ax in axs:
if xaxis == "T":
ax.set_xlabel("Temperature (mK)")
elif xaxis == "Nqp":
ax.set_xlabel("$N_{qp}$")
ax.ticklabel_format(axis="x", style="sci", scilimits=(0, 0))
if xaxis == "T":
axs[0].set_ylabel("$Q_i$")
axs[0].set_yscale("log")
elif xaxis == "Nqp":
axs[0].set_ylabel("$1/Q_i$")
if fracfreq:
axs[1].set_ylabel("$\delta f_{res}/f_0$")
else:
axs[1].set_ylabel("f0 (GHz)")
fig.tight_layout()
