# na-shifted-echo-echo-phase-filtering-p3.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 third-pulse duration # in three-pulse shifted-echo-echo phase-modulated -3Q-MAS sequence, # the first-pulse duration p1 = 4 micro seconds # the second-pulse duration p2 = 4 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 p1 4 variable p2 4 } proc pulseq {} { global par maxdt $par(tsw) matrix set 1 coherence {-3} matrix set 2 coherence {1} acq -y pulse $par(p1) $par(rf) x filter 1 pulse $par(p2) $par(rf) x filter 2 for {set i 1} {$i < $par(np)} {incr i} { pulse $par(tsw) $par(rf3) x acq -y } } 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 # 0.274566696 -3.86028565e-17 # 1.0734604 -2.36409988e-16 # 2.25576975 -4.95759918e-16 # 3.57194349 -7.07528612e-16 # 4.72506507 -9.24479535e-16 # 5.4455123 -1.09317397e-15 # 5.5580759 -1.04339739e-15 # 5.02372271 -8.92679411e-16 # 3.94643491 -5.87374507e-16 # 2.54563602 -2.51842397e-16 # 1.10332039 1.13155461e-16 # -0.0999344227 3.76937862e-16 # -0.844877196 5.18813191e-16 # -1.01663305 4.71068323e-16 # -0.622885385 2.89816508e-16 # 0.214831159 -1.22011116e-17 # END