# na-shifted-echo-antiecho-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 # -8.58089164e-05 -2.89358614e-18 # -0.00258585639 2.90192689e-17 # -0.0177405226 -3.82328571e-18 # -0.0649520413 -2.02687535e-17 # -0.166243255 -1.67847181e-17 # -0.336804721 9.96160598e-18 # -0.579927683 -1.51045541e-17 # -0.889974816 7.67129712e-17 # -1.26037496 1.18682152e-16 # -1.68940229 1.59463465e-16 # -2.17824896 3.61834092e-16 # -2.72233757 3.38246037e-16 # -3.30282345 3.04640076e-16 # -3.88592966 3.86361729e-16 # -4.43240439 6.71163755e-16 # -4.91200417 1.15073246e-15 # END