Sensing matrix (abs)


Excitation:


H1:ASC-INP1_Y_EXC


H1:ASC-PRC1_Y_EXC


H1:ASC-PRC2_Y_EXC


H1:ASC-MICH_Y_EXC


H1:ASC-SRC1_Y_EXC


H1:ASC-SRC2_Y_EXC


H1:ASC-DHARD_Y_EXC


H1:ASC-CHARD_Y_EXC



Monitor channel:


H1:ASC-INP1_Y_OUT_DQ


H1:ASC-PRC1_Y_OUT_DQ


H1:ASC-PRC2_Y_OUT_DQ


H1:ASC-MICH_Y_OUT_DQ


H1:ASC-SRC1_Y_OUT_DQ


H1:ASC-SRC2_Y_OUT_DQ


H1:ASC-DHARD_Y_OUT_DQ


H1:ASC-CHARD_Y_OUT_DQ




H1:ASC-AS_A_DC_YAW_OUT_DQ


4.031685e-07


5.392346e-07


8.311928e-06


2.881588e-06


1.004452e-06


3.301726e-06


1.667395e-07


1.524016e-08




H1:ASC-AS_A_RF36_I_YAW_OUT_DQ


1.991316e-02


3.858034e-02


2.998611e-01


3.219276e-01


1.353022e-02


2.613919e-02


5.956869e-05


3.014351e-06




H1:ASC-AS_A_RF36_Q_YAW_OUT_DQ


1.013659e-02


8.320306e-03


5.906850e-02


1.600886e-01


1.564192e-03


3.046164e-02


2.631369e-04


4.566430e-05




H1:ASC-AS_A_RF45_I_YAW_OUT_DQ


1.661431e-03


2.121179e-03


6.452280e-03


2.210928e-02


1.743886e-03


6.018634e-03


9.055341e-04


2.395158e-04




H1:ASC-AS_A_RF45_Q_YAW_OUT_DQ


3.612030e-03


3.187511e-03


6.402889e-02


1.849432e-02


6.428634e-03


1.990436e-02


1.930394e-03


4.172696e-04




H1:ASC-AS_B_DC_YAW_OUT_DQ


1.757336e-07


6.941324e-07


8.164861e-06


4.630952e-07


1.081163e-06


5.167964e-07


1.199717e-07


1.471614e-08




H1:ASC-AS_B_RF36_I_YAW_OUT_DQ


4.313914e-03


9.863339e-03


3.969614e-02


9.370721e-02


2.542824e-03


2.871498e-02


2.469401e-04


3.410662e-05




H1:ASC-AS_B_RF36_Q_YAW_OUT_DQ


2.080965e-02


2.235516e-02


1.705056e-01


1.804781e-01


6.698143e-03


2.710248e-02


3.950121e-05


2.041372e-05




H1:ASC-AS_B_RF45_I_YAW_OUT_DQ


1.020778e-03


9.954585e-04


6.219793e-03


1.549895e-02


1.600995e-03


2.809151e-03


6.968702e-04


2.112154e-04




H1:ASC-AS_B_RF45_Q_YAW_OUT_DQ


1.365308e-03


6.034298e-04


2.545113e-02


1.160158e-02


6.862895e-03


3.255676e-03


1.580237e-03


3.007709e-04




H1:ASC-REFL_A_DC_YAW_OUT_DQ


5.887914e-05


3.642079e-06


4.864500e-06


8.840696e-07


5.707180e-08


1.118971e-07


1.920320e-09


1.760073e-08




H1:ASC-REFL_A_RF9_I_YAW_OUT_DQ


9.125244e-01


4.685791e-02


1.433883e-01


2.719587e-02


3.398776e-04


3.071677e-03


9.913482e-06


3.254621e-04




H1:ASC-REFL_A_RF9_Q_YAW_OUT_DQ


1.119344e-01


4.052422e-03


3.017529e-02


2.788209e-03


7.235137e-05


6.180180e-04


1.174930e-05


8.308296e-05




H1:ASC-REFL_A_RF45_I_YAW_OUT_DQ


3.226940e-01


1.826235e-02


2.025763e-01


5.645713e-02


1.924779e-03


8.484405e-03


1.656515e-05


2.711756e-04




H1:ASC-REFL_A_RF45_Q_YAW_OUT_DQ


7.134476e-02


8.995083e-03


1.064620e-01


2.517365e-02


2.447210e-03


9.818037e-03


4.068771e-06


1.069372e-04




H1:ASC-REFL_B_DC_YAW_OUT_DQ


7.072096e-05


1.609598e-06


3.478367e-06


3.256197e-07


4.663900e-08


6.349670e-08


1.569532e-09


8.590143e-09




H1:ASC-REFL_B_RF9_I_YAW_OUT_DQ


7.147608e-01


1.396809e-02


2.839755e-01


4.478032e-02


1.249494e-03


3.379724e-03


7.465704e-06


3.472900e-04




H1:ASC-REFL_B_RF9_Q_YAW_OUT_DQ


2.724818e-01


5.678733e-03


9.150944e-02


1.270724e-02


3.721091e-04


9.763051e-04


2.295483e-06


6.932303e-05




H1:ASC-REFL_B_RF45_I_YAW_OUT_DQ


2.846739e-01


2.667722e-02


5.800374e-02


9.514586e-03


4.868248e-04


1.040630e-03


1.751774e-05


3.269201e-04




H1:ASC-REFL_B_RF45_Q_YAW_OUT_DQ


2.082370e-02


6.591069e-03


3.520480e-02


1.409508e-02


4.185252e-04


1.431846e-03


5.608350e-06


6.566866e-05




H1:ASC-POP_A_YAW_OUT_DQ


2.329535e-07


4.373996e-07


7.104547e-07


1.840680e-07


3.540810e-09


1.446617e-08


3.051640e-10


4.730231e-09




H1:ASC-POP_B_YAW_OUT_DQ


1.624792e-07


3.356867e-07


4.080737e-07


1.022386e-07


1.532934e-09


7.861499e-09


2.480083e-10


4.031364e-09



Coherence matrix


Excitation:


H1:ASC-INP1_Y_EXC


H1:ASC-PRC1_Y_EXC


H1:ASC-PRC2_Y_EXC


H1:ASC-MICH_Y_EXC


H1:ASC-SRC1_Y_EXC


H1:ASC-SRC2_Y_EXC


H1:ASC-DHARD_Y_EXC


H1:ASC-CHARD_Y_EXC



Monitor channel:


H1:ASC-INP1_Y_OUT_DQ


H1:ASC-PRC1_Y_OUT_DQ


H1:ASC-PRC2_Y_OUT_DQ


H1:ASC-MICH_Y_OUT_DQ


H1:ASC-SRC1_Y_OUT_DQ


H1:ASC-SRC2_Y_OUT_DQ


H1:ASC-DHARD_Y_OUT_DQ


H1:ASC-CHARD_Y_OUT_DQ




H1:ASC-AS_A_DC_YAW_OUT_DQ


0.877995


0.936322


0.964207


0.964613


0.999556


0.999214


0.951342


0.366137




H1:ASC-AS_A_RF36_I_YAW_OUT_DQ


0.958806


0.981377


0.975624


0.999814


0.994314


0.988471


0.880617


0.004955




H1:ASC-AS_A_RF36_Q_YAW_OUT_DQ


0.952277


0.901434


0.820429


0.999562


0.922665


0.998616


0.942394


0.584411




H1:ASC-AS_A_RF45_I_YAW_OUT_DQ


0.933718


0.890399


0.328643


0.993219


0.993367


0.998007


0.996696


0.937408




H1:ASC-AS_A_RF45_Q_YAW_OUT_DQ


0.935617


0.830683


0.921302


0.935596


0.996761


0.998303


0.986227


0.831517




H1:ASC-AS_B_DC_YAW_OUT_DQ


0.514456


0.977653


0.982686


0.461225


0.999363


0.990782


0.973868


0.622839




H1:ASC-AS_B_RF36_I_YAW_OUT_DQ


0.813502


0.951416


0.598040


0.997792


0.952954


0.998459


0.958816


0.515462




H1:ASC-AS_B_RF36_Q_YAW_OUT_DQ


0.961435


0.962455


0.948682


0.998859


0.979631


0.993586


0.877446


0.239719




H1:ASC-AS_B_RF45_I_YAW_OUT_DQ


0.922720


0.667963


0.402587


0.991521


0.995724


0.994284


0.996490


0.945958




H1:ASC-AS_B_RF45_Q_YAW_OUT_DQ


0.854440


0.083537


0.587561


0.874576


0.997187


0.978271


0.980857


0.735839




H1:ASC-REFL_A_DC_YAW_OUT_DQ


0.994522


0.620990


0.135750


0.010622


0.009686


0.281819


0.009492


0.055766




H1:ASC-REFL_A_RF9_I_YAW_OUT_DQ


0.998993


0.839166


0.090888


0.447572


0.049205


0.759129


0.167374


0.930424




H1:ASC-REFL_A_RF9_Q_YAW_OUT_DQ


0.951957


0.447989


0.119508


0.166774


0.045552


0.587132


0.703928


0.839773




H1:ASC-REFL_A_RF45_I_YAW_OUT_DQ


0.997771


0.785327


0.607030


0.929066


0.882284


0.937111


0.684537


0.984272




H1:ASC-REFL_A_RF45_Q_YAW_OUT_DQ


0.945654


0.815915


0.738725


0.882462


0.976567


0.993592


0.537407


0.991905




H1:ASC-REFL_B_DC_YAW_OUT_DQ


0.999068


0.742474


0.031397


0.008371


0.031052


0.167697


0.038491


0.070031




H1:ASC-REFL_B_RF9_I_YAW_OUT_DQ


0.999382


0.461010


0.448559


0.823345


0.647265


0.888297


0.323946


0.987841




H1:ASC-REFL_B_RF9_Q_YAW_OUT_DQ


0.999599


0.643543


0.459728


0.772427


0.553919


0.841013


0.243502


0.955394




H1:ASC-REFL_B_RF45_I_YAW_OUT_DQ


0.998420


0.953713


0.271192


0.563421


0.766779


0.211379


0.886829


0.998096




H1:ASC-REFL_B_RF45_Q_YAW_OUT_DQ


0.988042


0.865125


0.415478


0.635645


0.289426


0.728005


0.838418


0.991842




H1:ASC-POP_A_YAW_OUT_DQ


0.995662


0.999210


0.988526


0.943128


0.435541


0.992223


0.871966


0.993443




H1:ASC-POP_B_YAW_OUT_DQ


0.996257


0.999320


0.971955


0.940216


0.319431


0.991293


0.911992


0.996432



Sensing matrix (complex)


Excitation:


H1:ASC-INP1_Y_EXC


H1:ASC-PRC1_Y_EXC


H1:ASC-PRC2_Y_EXC


H1:ASC-MICH_Y_EXC


H1:ASC-SRC1_Y_EXC


H1:ASC-SRC2_Y_EXC


H1:ASC-DHARD_Y_EXC


H1:ASC-CHARD_Y_EXC



Monitor channel:


H1:ASC-INP1_Y_OUT_DQ


H1:ASC-PRC1_Y_OUT_DQ


H1:ASC-PRC2_Y_OUT_DQ


H1:ASC-MICH_Y_OUT_DQ


H1:ASC-SRC1_Y_OUT_DQ


H1:ASC-SRC2_Y_OUT_DQ


H1:ASC-DHARD_Y_OUT_DQ


H1:ASC-CHARD_Y_OUT_DQ




H1:ASC-AS_A_DC_YAW_OUT_DQ


4.027209e-07 + 1.899337e-08i


-6.253913e-09 + -5.391983e-07i


2.288100e-06 + 7.990791e-06i


-1.737378e-06 + 2.298928e-06i


9.970103e-07 + -1.220431e-07i


-3.298331e-06 + 1.496864e-07i


-1.508166e-07 + 7.110860e-08i


1.422199e-08 + 5.477017e-09i




H1:ASC-AS_A_RF36_I_YAW_OUT_DQ


1.212717e-02 + 1.579448e-02i


3.751943e-02 + -8.985242e-03i


-2.913908e-01 + -7.076751e-02i


-2.472445e-01 + 2.061735e-01i


-1.322697e-02 + -2.848534e-03i


1.366219e-02 + 2.228457e-02i


4.838004e-05 + 3.475343e-05i


1.461367e-06 + -2.636422e-06i




H1:ASC-AS_A_RF36_Q_YAW_OUT_DQ


6.193082e-03 + 8.024728e-03i


8.308821e-03 + 4.370276e-04i


-5.859089e-02 + 7.496292e-03i


-1.291612e-01 + 9.458192e-02i


5.299499e-04 + -1.471683e-03i


-2.998403e-02 + 5.372998e-03i


-2.257520e-04 + -1.351926e-04i


2.035940e-06 + 4.561889e-05i




H1:ASC-AS_A_RF45_I_YAW_OUT_DQ


-1.106900e-03 + -1.239001e-03i


-1.770337e-03 + 1.168462e-03i


4.923293e-03 + -4.170503e-03i


1.573156e-02 + -1.553507e-02i


-1.447344e-03 + 9.727969e-04i


5.396046e-03 + -2.665830e-03i


7.231289e-04 + -5.450473e-04i


-1.847234e-04 + 1.524634e-04i




H1:ASC-AS_A_RF45_Q_YAW_OUT_DQ


3.338836e-03 + -1.378019e-03i


-5.265454e-04 + -3.143720e-03i


3.048349e-02 + 5.630679e-02i


-1.485481e-02 + 1.101701e-02i


6.256012e-03 + -1.479746e-03i


-1.980437e-02 + 1.992639e-03i


-1.813056e-03 + 6.627589e-04i


-6.409816e-05 + 4.123170e-04i




H1:ASC-AS_B_DC_YAW_OUT_DQ


1.461257e-07 + 9.761966e-08i


6.782250e-07 + -1.477519e-07i


-7.024469e-06 + -4.161945e-06i


4.608787e-07 + -4.525432e-08i


-1.071667e-06 + 1.429777e-07i


-5.075450e-07 + -9.734776e-08i


1.095644e-07 + -4.887599e-08i


7.568048e-10 + -1.469667e-08i




H1:ASC-AS_B_RF36_I_YAW_OUT_DQ


3.204781e-03 + 2.887774e-03i


-5.959230e-03 + 7.859582e-03i


-2.801530e-02 + -2.812343e-02i


-5.956846e-02 + 7.233699e-02i


2.381974e-03 + 8.900326e-04i


2.864792e-02 + 1.961192e-03i


-2.172238e-04 + -1.174446e-04i


-1.559346e-05 + 3.033324e-05i




H1:ASC-AS_B_RF36_Q_YAW_OUT_DQ


2.003745e-02 + 5.616267e-03i


1.835800e-02 + -1.275684e-02i


-1.613873e-01 + 5.501185e-02i


-1.121047e-01 + 1.414386e-01i


-6.570962e-03 + -1.299065e-03i


2.710236e-02 + -8.189905e-05i


3.852000e-05 + -8.749586e-06i


8.448834e-06 + 1.858325e-05i




H1:ASC-AS_B_RF45_I_YAW_OUT_DQ


2.658061e-04 + 9.855628e-04i


9.948031e-04 + -3.611703e-05i


-2.906763e-03 + -5.498778e-03i


-1.155863e-02 + 1.032548e-02i


1.425911e-03 + -7.279870e-04i


-4.509042e-04 + 2.772727e-03i


-5.449907e-04 + 4.342962e-04i


1.579692e-04 + -1.402059e-04i




H1:ASC-AS_B_RF45_Q_YAW_OUT_DQ


-9.145710e-04 + 1.013719e-03i


4.887684e-04 + 3.538828e-04i


-2.033838e-02 + -1.530067e-02i


1.034215e-02 + -5.257066e-03i


-6.722925e-03 + 1.378987e-03i


9.717521e-04 + -3.107270e-03i


1.459218e-03 + -6.064927e-04i


7.583010e-05 + -2.910549e-04i




H1:ASC-REFL_A_DC_YAW_OUT_DQ


-5.860906e-05 + 5.633033e-06i


2.525165e-06 + -2.624554e-06i


-8.568744e-07 + 4.788437e-06i


-7.984156e-07 + -3.796204e-07i


-1.069412e-08 + -5.606092e-08i


1.099525e-07 + -2.077054e-08i


3.289540e-10 + -1.891935e-09i


-1.713573e-08 + -4.019022e-09i




H1:ASC-REFL_A_RF9_I_YAW_OUT_DQ


-9.114679e-01 + 4.389823e-02i


3.058194e-02 + -3.550223e-02i


-7.655207e-02 + 1.212435e-01i


-2.045725e-02 + 1.791971e-02i


-2.217381e-04 + -2.575830e-04i


2.933607e-03 + 9.105774e-04i


-3.089962e-06 + 9.419621e-06i


3.028945e-04 + -1.190819e-04i




H1:ASC-REFL_A_RF9_Q_YAW_OUT_DQ


-1.118313e-01 + 4.802969e-03i


1.243774e-03 + -3.856832e-03i


2.259966e-03 + 3.009054e-02i


-2.081784e-03 + 1.854800e-03i


8.551393e-06 + 7.184424e-05i


6.137564e-04 + -7.245219e-05i


2.335265e-06 + -1.151488e-05i


7.971158e-05 + -2.342738e-05i




H1:ASC-REFL_A_RF45_I_YAW_OUT_DQ


3.223035e-01 + -1.587003e-02i


1.731560e-02 + -5.803764e-03i


-1.951371e-01 + -5.439350e-02i


-7.334375e-03 + 5.597870e-02i


-1.390848e-03 + 1.330532e-03i


8.352473e-03 + 1.490413e-03i


1.525240e-05 + -6.462832e-06i


-2.423681e-04 + 1.216301e-04i




H1:ASC-REFL_A_RF45_Q_YAW_OUT_DQ


7.133986e-02 + -8.361979e-04i


7.654021e-03 + 4.725196e-03i


-1.584410e-02 + -1.052764e-01i


-1.961981e-02 + -1.577263e-02i


1.332580e-03 + -2.052576e-03i


7.550922e-03 + -6.275144e-03i


-3.783090e-06 + -1.497708e-06i


-9.110278e-05 + 5.599862e-05i




H1:ASC-REFL_B_DC_YAW_OUT_DQ


-7.049794e-05 + 5.612092e-06i


1.081151e-06 + -1.192442e-06i


3.360272e-06 + 8.986711e-07i


2.346302e-07 + -2.257806e-07i


4.108104e-08 + 2.208041e-08i


4.947713e-09 + -6.330364e-08i


-1.548611e-09 + 2.554095e-10i


8.190983e-09 + -2.588118e-09i




H1:ASC-REFL_B_RF9_I_YAW_OUT_DQ


7.138949e-01 + -3.517070e-02i


5.926564e-03 + 1.264845e-02i


-2.368256e-01 + -1.567026e-01i


-3.877796e-02 + 2.239523e-02i


-9.721380e-04 + -7.849731e-04i


1.722394e-03 + 2.907902e-03i


4.637671e-06 + -5.850533e-06i


3.044071e-04 + -1.671727e-04i




H1:ASC-REFL_B_RF9_Q_YAW_OUT_DQ


2.721447e-01 + -1.355046e-02i


8.572409e-04 + 5.613658e-03i


-7.114326e-02 + -5.755532e-02i


-1.124951e-02 + 5.909535e-03i


-2.945575e-04 + -2.273787e-04i


3.641409e-04 + 9.058549e-04i


2.285760e-06 + -2.110506e-07i


5.901495e-05 + -3.637193e-05i




H1:ASC-REFL_B_RF45_I_YAW_OUT_DQ


-2.841604e-01 + 1.709044e-02i


2.314298e-02 + -1.326939e-02i


-4.648977e-02 + -3.468623e-02i


-9.497930e-03 + -5.627392e-04i


2.922929e-04 + -3.893112e-04i


-5.357178e-04 + 8.921423e-04i


-4.154870e-06 + 1.701789e-05i


-2.879682e-04 + 1.547613e-04i




H1:ASC-REFL_B_RF45_Q_YAW_OUT_DQ


-2.074948e-02 + 1.756564e-03i


5.808172e-03 + -3.115659e-03i


-3.450300e-02 + -6.994337e-03i


-9.470159e-03 + 1.043970e-02i


-4.149770e-04 + 5.438237e-05i


1.159381e-04 + 1.427145e-03i


1.278657e-06 + 5.460644e-06i


-5.912523e-05 + 2.857588e-05i




H1:ASC-POP_A_YAW_OUT_DQ


2.328406e-07 + -7.252475e-09i


3.552911e-07 + -2.551209e-07i


-7.090824e-07 + 4.413670e-08i


-1.410812e-07 + 1.182249e-07i


-2.361277e-09 + -2.638504e-09i


1.272490e-08 + 6.880929e-09i


-1.507841e-10 + -2.653097e-10i


4.119425e-09 + -2.324956e-09i




H1:ASC-POP_B_YAW_OUT_DQ


1.612728e-07 + -1.976291e-08i


2.691307e-07 + -2.006345e-07i


4.065154e-07 + -3.562865e-08i


8.229263e-08 + -6.066842e-08i


1.615260e-10 + 1.524400e-09i


-6.909220e-09 + -3.750446e-09i


-1.708629e-11 + 2.474191e-10i


-3.566622e-09 + 1.879124e-09i




GPS Times:

1109762803 1109762863 H1:ASC-INP1_Y_EXC
1109762884 1109762944 H1:ASC-PRC1_Y_EXC
1109762965 1109763026 H1:ASC-PRC2_Y_EXC
1109763047 1109763107 H1:ASC-MICH_Y_EXC
1109763128 1109763188 H1:ASC-SRC1_Y_EXC
1109763209 1109763270 H1:ASC-SRC2_Y_EXC
1109763291 1109763351 H1:ASC-DHARD_Y_EXC
1109763372 1109763432 H1:ASC-CHARD_Y_EXC

I updated the script to measure a generic sensing matrix, already described in 17085. The script attached to that log entry was using tdssine to generate the excitation: the drawback was that the sine was switched on without any ramp. Today this was causing the DRMI to drop lock.

This new version implements a ramp in and ramp out of the excitation, using awgstream. The usage is the same as the old version:

The script configuration is at the beginning of the python file. One has to set

• the list of excitation channels to be used, the corresponding line frequencies and amplitudes, the duration of each measurement
• the list of error signals (the one you want to include in the sensing matrix, at the "numerator" of the transfer function)
• the list of monitoring channels that are used to measure the motion of the optics (those will be used as the "denominator" in the transfer functions)

When lauched without any command line argument, the script switches on the excitation one at a time (GPS times are saved to a log file for future reference). If you want to reprocess a previous measurment, you can launch the script passing the logfile as a command line argument. In this case the injections will not be performed, only the old data will be reprocessed.

When all line injections are done, the script reads the data from disk and compute the sensing matrix. Basically, it's the value of the transfer function (error signals) / (monitoring channels).

The output is saved to an HTML file that contains three tables:

• the absolute values of the sensing matrix, with the dominant degree of freedom emphasized for each error signal, and not coherent elements grayed out
• the table of coherences
• the sensing matrix with the full complex elements

The attached scripts have been used to measure both pitch and yaw sensing matrices in full lock, DC readout.

Sensing matrices will follow

Sheila, Alexa, Gabriele, Dan, Evan

We've closed the following ASC loops in full lock, both pitch and yaw:

• ASB36Q -> BS
• ASAIR45Q -> dETM
• REFLA9I - REFLB9I -> IM4
• REFLA9I + REFLB9I -> cETM
• REFLA45I -> PR2 [a few 100s of mHz for pitch, ~20 mHz for yaw]
• POPB -> PRM [100-200 mHz for pitch, 50-100 mHz for yaw]
• ASB36I -> SRM [~100 mHz for pitch and yaw]
• ASC -> SR2 [~100 mHz for pitch, <50 mHz for yaw]

The above order is the order in which we turned them on

Turning on PR2 appears to just impress low-frequency seismic motion onto POP18 and ASAIR90. This is somewhat improved by turning on the PRM loop, but POP18 and ASAIR90 remain worse than if no PRC ASC is engaged at all.

To tune the demodulation phase of any R signal, you have to inject a line and typically minimize the line in the Q spectrum and maximize in the I spectrum.

The attached script help in this operation. If you set up the I and Q channel names and the frequency of the line you are injecting, it shows a StripTool like chart showing in real time the ratio of Q over I at the line frequency. You can then move the demodulation phase to bring the ratio to zero. Since what is plotted is the transfer function, it has a sign, so you can rely on the zero crossing.

This script can be easily modified to carry out different tasks, for example

• tuning the longitudinal offset of a cavity (using the transmited power)
• tuning the angular offsets of the IMC, injecting a jitter line and changing the ASC offsets
• ....

Sheila, Gabriele, Stefan, Alexa

Today we managed to close all DRMI ASC loops.

• REFLA9I - REFLB9I --> IM4 (BW: ~100mHz)
• POP A DC -->PRM (BW: ~10mHz)
• REFLA9I --> PR2 (BW: '100mHz)
• ASB36Q --> BS (BW: 3Hz)
• AS_C --> SR2 (BW: ~1mHz)
• ASB36I --> SRM (BW: ~100mHz)

The gain and filter settings are depicted in the first attachment. We also have decoupled AS_C from SRM with an adjustment in the output matrix (see second attachement). The BW are all rough estimates. Both POP A DC (P,Y=-0.03. 0.3) and ASC_C D (P,Y = -0.5, 0.1) have offsets that correspond to good buildups. So far we have been able to close these loops several times even with re-running initial alignment. This is all in the guardian now.

The first plot attached is a 3mHz bandwidth spectrum of the calibrated DARM signal from last night's 4-hour lock.

Note the dips in the spectrum around the bounce and roll modes of the quad suspensions (9.78Hz and 13.9Hz, respectively).  Evan and I tracked these down to bandstops in the ETMX L1 LOCK_L filter bank that are not included in the calibration (because we don't have a hi-resolution loop gain measurement of DARM at those frequencies).

The second plot attached is a zoom of the region around the violin modes.  In preparation for some aggressive violin mode damping, I've populated the test mass L2_DAMP filter banks with bandpasses at frequencies for various collections of lines.  At the next late-night lock opportunity we'll apply the violin mode damping method that's described here (which has already been successfully applied for the 508.008Hz mode on ETMY) and see what we can do.

The initial assignment of modes --> optics follows the frequencies that were collected by Nutsinee here, but for the forests around 501-2Hz and 504-7Hz it's very rough guesswork.  Here is a list of the mode frequencies (measured from last night's data) and a rough assignment to optics:

Also on the to-do list is to move the OMC alignment dither lines up above 1.5kHz and optimize the dither amplitude based on the OMC DCPD RIN noise floor in that band.

J. Kissel, K. Izumi, K. Kawabe

Corrections to gamma calculation
After battling through a little bit of complex number analysis in Simulink, I was able to create a revised calculation of the slowly, time-varying, optical gain correction to the IFO's DARM sensing function for the production of calibrated DARM displacement in the front end. What I had originally implemented (see LHO aLOG 17102) had ignored that the change in open loop gain transfer function at the calibration line frequency is a complex number and so what just, in general wrong. 

See attached screenshot 2015-03-05_CAL_CS_GAMMA_LINE1.png for the current implementation, and see the bottom half of LHO aLOG 17102, which is still valid, for what we intend to *do* with the infrastructure.

Notes:
- GAMMA is the ratio of the current DARM open loop gain transfer function at a given calibration line frequency, G, and the same transfer function at a reference time, G0, is ideally real and unity. It is this real part of GAMMA that is fed into the DARM block to correct the fluctuation in optical gain.
- Ideally, the GAMMA should be frequency independent, and we've implemented the correction as though it were frequency independent, i.e. the output of GAMMA calculated for ONE line should be selected in the GAMMA_MATRIX. However, offline, we'll want to *confirm* that the correction is frequency independent, so all four calibration lines have EPICS outputs and Fast Channel Test Points (even though at the moment, we're only planning to turn on two; see LLO aLOG 15870).
- The AMP EPICs input of each line (which again should be synchronized with that line's DEMOD's OSC CLK GAIN) should be in units of DARM_CTRL counts; Joe's matlab script referenced in LLO aLOG 15944 should take care of converting the desired amplitude to get an SNR of 30 in whatever current DARM sensitivity we have.

Updates to CAL_CS_MASTER
- I've cleaned up the DARM block in the CAL_CS_MASTER block, and added descriptive text that describes the output as we're currently intending to use it, i.e. as what's described in LLO aLOG 16421. See 2015-03-06_CAL_CS_DARM.png.
- I've added a DAQ channel list that will now store channels for the auxiliary degrees of freedom which we'll eventually calibrate. The policy is to store all ERR, CTRL, and SUM signals at the full data rate, but only store the SUM in the science frames. I had considered storing the CTRL channels at a lower rate in the commissioning frames, but since they're only used for commissioning the channels, and one almost always wants to put both CTRL and ERR on the same plot, out to the frequency desired for the ERR signal, I leave them sampled at the same rate. Again, this only impacts the commissioning frames. See 2015-03-06_CAL_CS.png
- I've added whitening filters for all of the auxiliary DOFs CTRL, ERR, and SUM channels. If we have dynamic range / double precision issues with DARM, I'm sure we'll eventually have similar problems with these DOFs.
- I've added EPICs readback of all ERR, CTRL, and SUM channels, and changed the naming convention to "MON" instead of "SLOW." This is so we can get displays of these channels on the overview screen which we'll evenutally have to create.

Added HARDWARE_INJ Library Part to Top Level h1calcs.mdl
I've updated the 
${userapps}/cal/common/models/ 
directory, such that we've received the new Hardware Injection library part. It's as described in LLO aLOG 17120, but in summary, the new feature is an ODC bit.

Summary--Looking closer shows that the disturbance seen on the dofs are occurring before the loops are driving; what the hay?  GS13 switching very likely the thing.

Details: Hugo gave me some changes for the guardian and it does as expected but that did not correct the problem.  There was some suspicion that Guardian may have been doing things at the same time and I think these result bear this out but I ignored one thing I should have ruled out first.

The first attachment shows a manual isolation turn on from Tuesday.  This is a zoom in from alog 17042.  MICH is NOT on.  First I use the Reset CPS offset button on the medm which gets 12 samples over 3 seconds for an average (T=1).  It then loads a ramp time of 5 seconds, puts the average values determined into the SETPOINT_NOW, and, the model takes over from there loading the SETPOINT_NOW into the Current Setpoint (BIAS_RAMPMON) over the prescribed 5 seconds.  The next step is turning on the Z Isolation Loop.  It is only the vertical we are engaging and I do this with the Command script (with boost, T=2.)  Notice that nothing shows up on the RZ_LOCATIONMON until T=3 when I start the RZ loop.  This all looks reasonable.

The second attachment is a few minutes later using the guardian to isolate state2, MICH is still NOT in the picture.  T=1 shows that Guardian does not use a TRAMP and the front end puts it in with no delay.  Theoretically, this should not be any problem as again, the loops are not on yet.  However, at T=2, RZ and Z channels start to show motion, even though the loop switches are on until T=3, about 5 seconds later!  T=2 is hard to pinpoint but it is looks to be 2 or 3 seconds after T=1. 

The 3rd attachment is from this afternoon and now MICH is Dark Locked.  I've modified the Guardian to do a 4 second ramp of the Setpoint to RAMPMON.  You can see this as the RESIDUALMON goes to zero as well as the RAMPMON.  Then, 1 or 2 seconds after the RAMPMON is finished, the RZ starts moving, again, all before the Z-loops engage.  With Mich though, the lock breaks (see Watchdog upper right) and who knows after that.

What is the Guardian doing before this... aha!  The switching of the GS13 is being done by the guardian and although it would not impact the CPS_Z_LOCATIONMON, it may glitch the damping loop enough.  Yup, there it is.  The last plot I've added the GS13 SWSTAT and it corresponds to the time the RZ_LOCATION starts to drive off.

Until the Isolation loops are adjusted to work with the MICH LOCK, we should keep the GS13 gains in whitened low gain.  And, unless we make the gain switching even smoother, there needs to be more settling time after the gain switching when we do switch.

Follow up from alog16977 to see if there are any DAC glitches seen during the full interferometer lock. No DAC glitches seen so far. I have also attached the spectrogram and the time series plot of DARM_OUT_DQ in case you're curious... 

These are the OpLev trends for the last 24 hours. All appear to operating normally. Have also included zoom plots.  

The nds2-client software for x1work (Ubuntu 12.04) has been updated to 0.11.4 for testing.

Scott L. Ed P. Chris S.

The cleaning crew relocated the lights, generator and related washing equipment this morning to beam tube section from single door to X-1-5 double doors. Sampled dirty sections and re-cleaned 2 sections previously cleaned earlier in the week, charts show specific sections. 15 meters cleaned and servicing of diesel generator is ongoing.

Sudarshan, Rick

We saw some transient in Pcal laser power in our recent observation. The power variation in these transients are about 20% at its max. We are working on to find where the issue is. Until then, donot trust Pcal calibartion to more than 50% (over-estimation) of what it reports.

After correcting some operational problems and resolving file access issues, I have rerun the PSL DBB for this week. We will review the plots at the weekly PSL meeting.

Kiwamu, Daniel, Elli

Yesterday we made some changes to SRMI locking and were able to stay locked much more reliablly. In this configuration I was able to take multiple measurements of SRC length without worrying about keeping lock (I'll have more to say on these results shortly..).  Lock stretches lasted for ~1hr provided noone was walking around the LVEA.  SRMI would regain lock by itself when left in the following configuration:

IMC input power 5W.  ASC master gain 0.  H1:SUS-SRM_M2_LOCK_OUTSW_L set to OFF.  H1:SUS-BS_M3_ISCINF_L_LIMIT set to 50000.

MICH input ASAIR_A_LF intrix value 0.25, MICH gain 800, MICH offset -200, MICH fliters FM7 (150^3:1), FM9(ELP40) always on and FM2 (1:0) triggered, MICH signal going to BS with outrix value 1.

SRCL input REFLAIR_A_RF9_I intrix value -3.75, SRCL gain -40000, SRCL offset 0, SRCL filters FM9(cntrl) and FM10(CLP300) always on and FM2(1:0)and FM3(4:0) triggered, SRCL signal going to SRM with outrix value 1.

(Set all other LSC matrix elements to zero.  Set power scale to 5W.  Turn on H1:LSC-CONTROL_ENABLE.)

MICH triggers on ASAIR_A_DC matrix valuen 1, upper threshold 1000, lower threshold 400.  MICH FM2(1:0) filter triggers after 0.4 sec upper threshold 1000 lower threshold 400.

SRCLtriggers on ASAIR_A_DC matrix valuen 1, upper threshold 800, lower threshold 300.  MICH FM2(1:0) filter triggers after 0.2 sec upper threshold 300 lower threshold 300.

J. Kissel, K. Izumi

Motivated by recent confusion about calibration because changes in the optical gain, Kiwamu and I took a long hard look at a front-end implementation of computing slowly-time-varying optical gain correction to the IFO's DARM sensing function, traditionally called 'gamma' among the Calibration group. Re-convincing ourselves of what we want to do, based on how gamma has been computed in the past, and how aLIGO's *offline* GDS code is still doing it (see T1300088, L1400081, LHO aLOG 16926), we've decided to try the following attached configuration.

We have not yet done anything with this new version of the h1calcs.mdl (no compile, no svn commit, no nothing), I just want to document what we've done for discussion (though there should be no harm in committing to the repo and just installing this model since its independent of any control system, and we've made sure that the configuration control for the EPICs records for this model are now sound -- see LHO aLOG 17037).

There're lots of changes to what was implemented BEFORE, (i.e. the first crack at it):
- The BEFORE implementation had fed DARM_ERR into the GAMMA block for calculation... that was just wrong, so we fixed it.
- The calibration line's oscillator parts, the filtering of DARM_CTRL, and the phasing and filtering of the I and Q outputs have all been brought together into one block -- the already existing library part for a demodulator,
${userapps}/cds/common/models/lockin.mdl.
The advantage is that there's already canned, generic, MEDM screens pre-made for such a tool, so we don't have to re-invent that wheel. This changes the individual calibration line's channel names from
${IFO}:CAL-CS_LINEn_LO 
to
${IFO}:CAL-CS_GAMMA_LINEn_DEMOD_LO
where n = 1,2,3,4. The former wasn't stored in the frames and now screens have been made using them, or to our knowledge even measured once as a test point, so I don't think this channel change matters much. The overall sum of lines is still, the perhaps more transparent,
${IFO}:CAL-CS_LINE_SUM
- Surrounding the DEMOD library part, is the actual calculation of gamma. In this calculation, we've found the need to create two new EPICs records: 
${IFO}:CAL-CS_GAMMA_LINEn_REF_OLG
and
${IFO}:CAL-CS_GAMMA_LINEn_AMP
the former is to be the reference, DARM open loop gain transfer function magnitude or real part at the calibration line frequency, and AMP is the calibration line amplitude. It would be best is AMP was taken directly from the output of the OSC part in the DEMOD block, but unfortunately that front-end code accessibility is not a feature yet built into the part. We'll ask Rolf about adding it, but of course, the OSC part is used in LOTS of other places, so the headache may be better dealt with by keeping two EPICs records synchronous than to terminate the output of every one else's oscillator parts in every other model literally world-wide. This new library block lives in
${userapps}/cal/common/models/CAL_GAMMA_CALC_MASTER.mdl
- There had been 4 calibration lines, which means one could potentially calculate a gamma from any of these lines -- but only one should be used to correct the DARM calibration time series. So, we've installed the infrastructure to calculate a gamma for every line, but sent the output into a 4x1 matrix, so we can choose which gamma to use "on the fly," or at least without have to change the front-end code.

Comments on what we intend to *do* with the infrastructure:
- Make / Improve the CAL-CS overview screen to include the GAMMA calculation as well as a display of the calibration lines.
- We'll install two DARM calibration lines at 34.7 and 538.1 [Hz] as described in LLO aLOG 15870.
- We'll set the amplitude such that we have an SNR of 30 as described in LLO aLOG 15944, and make sure to copy the CLK_GAIN over to the AMP EPICs record and update the records in the CAL-CS SDF system.
- We'll use some reasonably aggressive band-pass at the given line's frequency in the DEMOD_SIG bank, and install a low-pass filter with a corner frequency at 0.01 [Hz] in the I and Q. The corner frequency is chosen to represent a 100 [sec] "average." In S5 and S6, recall that the offline calibration correction was computed by averaging over one minute (60 [sec]) and applied on the minute. Over the entire two year run of S5, this correction factor did not deviate from unity by more than 5% (see P0900120). Indeed, in S5, a study was done the compute this factor faster, every second, and it was deemed unnecessary (I think this study was posted on Myungkee Sung's personal webpage or on a S5 Review wiki page or something, I'm not gunna bother finding it. #trustme #doctor). So, in aLIGO, where we believe the optical gain is *more* stable, we'll chose an averaging time of 100 [sec] for now.