# na-filtering-cogwheel-23.in # approach: filtering the desired coherence (3Q) after the first pulse # and (1Q) after the second pulse # spin-3/2 antiecho amplitude optimization # versus the first-pulse duration # in three-pulse split-t1 3QMAS 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 23*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 # -2.05583862e-05 -6.91374421e-19 # -0.000619528094 6.95179555e-18 # -0.00425033355 -9.6396759e-19 # -0.0155614266 -4.75314734e-18 # -0.0398291133 -3.96951638e-18 # -0.0806927977 3.23917364e-18 # -0.138941007 -3.99979284e-18 # -0.213223133 1.60662582e-17 # -0.301964834 3.0525331e-17 # -0.404752632 3.65355361e-17 # -0.521872147 8.64451442e-17 # -0.652226709 8.06359928e-17 # -0.791301451 7.61951048e-17 # -0.931003981 9.10896077e-17 # -1.06193022 1.63358664e-16 # -1.17683433 2.76215091e-16 # END