# na-spam-echo-selective-12-cycling-p1.in # approach: 12-phase cycling the first pulse and the receiver # spin-3/2 echo amplitude optimization # versus the first-pulse duration # in three-pulse spam-echo -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 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 NA 12 variable deltapA 3 } proc pulseq {} { global par maxdt $par(tsw) acq $par(phREC) for {set i 1} {$i < $par(np)} {incr i} { pulse $par(tsw) $par(rf) $par(phA) store 2 pulse $par(p2) $par(rf) x pulse $par(p3) $par(rf3) -x acq [expr $par(phREC) - 90] reset prop 2 } } proc main {} { global par for {set jA 0} {$jA < $par(NA)} {incr jA} { set par(phA) [expr $jA*360./$par(NA)] set par(phREC) [expr $par(deltapA)*$par(phA)] 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 # 2.38508572e-05 -1.94289029e-16 # 0.000727400625 -1.66533454e-16 # 0.0050896491 -2.77555756e-16 # 0.0191407993 -5.55111512e-16 # 0.0506122157 -7.21644966e-16 # 0.106288417 -7.21644966e-16 # 0.189627961 -3.33066907e-16 # 0.299897436 -5.55111512e-17 # 0.432969353 -4.51028104e-16 # 0.582908295 -2.35922393e-16 # 0.743224232 -6.9388939e-16 # 0.907279514 -3.60822483e-16 # 1.06822157 -5.55111512e-17 # 1.21924007 0 # 1.35459776 2.22044605e-16 # 1.47108365 7.21644966e-16 # END