# na-shifted-echo-echo-phase-filtering-p1.in # approach: filtering the desired coherence (-3Q) after the first pulse # and (1Q) after the second pulse # spin-3/2 echo amplitude optimization # versus the first-pulse duration # in three-pulse shifted-echo phase-modulated -3Q-MAS sequence, # the second-pulse duration p2 = 4 micro seconds # the third-pulse duration p3 = 2 micro seconds spinsys { channels 23Na nuclei 23Na quadrupole 1 1 1e6 1 0 0 0 } par { spin_rate 5000 variable tsw 0.25 sw 1.0e6/tsw np 17 crystal_file rep100 gamma_angles 10 proton_frequency 800e6 start_operator 96*I1z detect_operator I1c verbose 1101 variable rf 90000 variable rf3 93000 variable p2 4 variable p3 2 } proc pulseq {} { global par maxdt $par(tsw) matrix set 1 coherence {-3} matrix set 2 coherence {1} acq -y for {set i 1} {$i < $par(np)} {incr i} { pulse $par(tsw) $par(rf) x store 2 filter 1 pulse $par(p2) $par(rf) x filter 2 pulse $par(p3) $par(rf3) x acq -y reset prop 2 } } proc main {} { global par fsave [fsimpson] $par(name).fid puts "Larmor frequency (Hz) of 23Na: " puts [resfreq 23Na $par(proton_frequency)] } # SIMP # NP=17 # SW=4000000 # TYPE=FID # DATA # 0 0 # 6.83295818e-05 -3.19852429e-18 # 0.00208360158 2.5283732e-17 # 0.0146014963 3.00447803e-17 # 0.0550666967 2.49124655e-17 # 0.146162924 2.55589779e-17 # 0.30834346 2.59908304e-18 # 0.552892748 -1.13776806e-16 # 0.879255913 -1.63023313e-16 # 1.27749383 -2.82445029e-16 # 1.73362393 -4.81767962e-16 # 2.23431515 -5.66323416e-16 # 2.76854627 -6.96538049e-16 # 3.32633731 -7.96268262e-16 # 3.89664988 -8.95072757e-16 # 4.46673591 -1.15003779e-15 # 5.02372271 -1.25037909e-15 # END