def mmotion(self):
print "Minimizing micromotion. Initially MMamp:", self.MMAmp()
print "Remember that integration time should be 'long'"
Topmid = self.TopmidRead()
Comp = self.CompRead()
# Topmid=3.6
# Comp=3.4
print "Initial values: Topmid=%f, Comp=%f" % (Topmid, Comp)
# Variation parameters:
# nsteps=50 # number of steps for each dimension
# stepsize=0.001 # volts
# stepdelay=0.5 # seconds
acc = 1e-3
delta = acc * 10
pi = sp.array([[Topmid, Comp], [Topmid + delta, Comp + delta], [Topmid - delta, Comp - delta]])
F = self.VSetAndProbe
F(pi[0])
# Run downhill algorithm (for one RF setting):
# Let's assume RF=14.32 MHz
pf = downhill.amoeba(F, pi, acc)
print "Final values: Topmid=%f, Comp=%f" % (Topmid, Comp)
print "Micromotion amplitude:", self.MMAmp()
def mmotion(self): print "Minimizing micromotion. Initially MMamp:",self.MMAmp() print "Remember that integration time should be 'long'" Topmid=self.TopmidRead() Comp=self.CompRead() # Topmid=3.6 # Comp=3.4 print "Initial values: Topmid=%f, Comp=%f"%(Topmid,Comp) # Variation parameters: # nsteps=50 # number of steps for each dimension # stepsize=0.001 # volts # stepdelay=0.5 # seconds acc=1e-3 delta=acc*10 pi=sp.array([[Topmid,Comp],[Topmid+delta,Comp+delta],[Topmid-delta,Comp-delta]]) F=self.VSetAndProbe F(pi[0]) # Run downhill algorithm (for one RF setting): # Let's assume RF=14.32 MHz pf=downhill.amoeba(F,pi,acc) print "Final values: Topmid=%f, Comp=%f"%(Topmid,Comp) print "Micromotion amplitude:",self.MMAmp()
Backquarter=self.BackquarterRead()
print "Initial values: Topmid=%.4f, Comp=%.4f, Backquarter=%.4f"%(Topmid,Comp,Backquarter)
# Variation parameters:
acc=self.acc #1e-4
delta=self.delta #acc*30
pi=sp.array([[Topmid,Comp,Backquarter],[Topmid-delta,Comp-delta,Backquarter-delta],[Topmid+delta,Comp+delta,Backquarter+delta],[Topmid+delta,Comp-delta,Backquarter]])
try:
F=self.VSetAndProbe
# F(pi[0])
except Exception,e:
print "Exception:",e
raise e
# Run downhill alogrithm to find minimum in space of comp, top mid and back quarter
try:
pf=downhill.amoeba(F,pi,acc)
except Exception,e:
print time.strftime("%H:%M:%S"),"Exception occured in downhill amoeba:",e
raise e
self.MMAmp_f=float(self.ReadIonPMTALL()[4])
if None==pf:
improvement=-1
print "pf is not available!"
else:
improvement=self.MMAmp_f-self.MMAmp_i
print "Micromotion amplitude:",self.MMAmp_f, "Initially:",self.MMAmp_i
print "Delta MMAmplitude:",improvement,improvement/abs(self.MMAmp_i)*100.,"in percent"
self.InttimeSet(self.inttime_i)
self.Magic(0)
self.SetDDS_FREQ1(self.ReadParameter('F_BlueHi'))
