# Na-cog24(0,4,19,7).in # spin-3/2 anti echo and echo amplitude optimization # versus the first-pulse duration # in three-pulse amplitude-modulated z-filter 3QMAS, # the second-pulse duration p2 = 4 micro seconds # the third-pulse duration p3 = 2 micro seconds spinsys { channels 23Na nuclei 23Na quadrupole 1 2 1e6 0 0 0 0 } par { spin_rate 5000 variable tsw 0.25 sw 1.0e6/tsw np 17 crystal_file rep10 gamma_angles 10 proton_frequency 800e6 start_operator I1z detect_operator I1c verbose 1101 variable rf 90000 variable rf3 9300 variable p2 4 variable p3 2 variable N 24 variable wA 0 variable wB 4 variable wC 19 variable wRec 7 } proc pulseq {} { global par maxdt $par(tsw) acq -x for {set i 1} {$i < $par(np)} {incr i} { pulse $par(tsw) $par(rf) $par(phA) store 2 pulse $par(p2) $par(rf) $par(phB) pulse $par(p3) $par(rf3) $par(phC) acq [expr $par(phREC) - 90] reset prop 2 } } proc main {} { global par for {set j 0} {$j < $par(N)} {incr j} { set par(phA) [expr $j*$par(wA)*360./$par(N)] set par(phB) [expr $j*$par(wB)*360./$par(N)] set par(phC) [expr $j*$par(wC)*360./$par(N)] set par(phREC) [expr $j*$par(wRec)*360./$par(N)] set g [fsimpson] if [info exists f] { fadd $f $g funload $g } else { set f $g } } fsave $f $par(name).fid funload $f puts "Larmor frequency (Hz) of 23Na: " puts [resfreq 23Na $par(proton_frequency)] } #SIMP #NP=17 #SW=4000000 #TYPE=FID #DATA #0 0 #5.68864026e-06 1.81590148e-09 #0.000175404036 4.78996552e-08 #0.00125103983 3.10814517e-07 #0.00483119806 1.11811006e-06 #0.0132026412 2.88802866e-06 #0.0287972389 6.0087084e-06 #0.0535033682 1.06924424e-05 #0.0880763542 1.68444139e-05 #0.131797918 2.40037622e-05 #0.182424237 3.1413811e-05 #0.236409696 3.82302419e-05 #0.289394029 4.37930719e-05 #0.33692896 4.78260423e-05 #0.375344174 5.04442828e-05 #0.402535371 5.19563867e-05 #0.418392862 5.25788337e-05 #END