# al-shifted-echo-amplitude-selective-40-cycling-p3.in # approach: 40-phase cycling the first and the third pulses and the receiver # spin-5/2 echo and antiecho amplitude optimization # versus the first-pulse duration # in three-pulse shifted-echo amplitude-modulated 5Q-MAS sequence, # the first-pulse duration p1 = 4 micro seconds # the third-pulse duration p2 = 4 micro seconds spinsys { channels 27Al nuclei 27Al quadrupole 1 2 3e6 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 p1 4 variable p2 4 variable NA 10 variable NC 4 variable deltapA -5 variable deltapC 2 } proc pulseq {} { global par maxdt $par(tsw) acq $par(phREC) pulse $par(p1) $par(rf) $par(phA) pulse $par(p2) $par(rf) $par(phB) for {set i 1} {$i < $par(np)} {incr i} { pulse $par(tsw) $par(rf3) $par(phC) acq [expr $par(phREC) - 90] } } proc main {} { global par set par(phB) 0 for {set jC 0} {$jC < $par(NC)} {incr jC} { set par(phC) [expr $jC*360./$par(NC)] 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) + $par(deltapC)*$par(phC)] 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 27Al: " puts [resfreq 27Al $par(proton_frequency)] } # SIMP # NP=17 # SW=4000000 # TYPE=FID # DATA # 0 0 # -0.000573126484 3.10604836e-05 # -0.00204592708 0.000127119534 # -0.00368208794 0.000305222846 # -0.00461590225 0.000586394934 # -0.00427405157 0.000980250631 # -0.00254646882 0.00147946153 # 0.000341083449 0.00206523735 # 0.0041292242 0.00271822963 # 0.00878841512 0.00342718789 # 0.0145554968 0.00418926324 # 0.0217505552 0.00500323955 # 0.0305732981 0.0058641907 # 0.0410344372 0.00676464129 # 0.0529958858 0.0076980317 # 0.066233641 0.00865866336 # 0.0804957629 0.00963819693 # END