# al-spam-echo_-5Q-selective-20-cycling-p2.in # approach: 20-phase cycling the first pulse and the receiver # spin-5/2 antiecho amplitude optimization # versus the second-pulse duration # in three-pulse spam-echo 5Q-MAS sequence, # the first-pulse duration p1 = 4 micro seconds # the third-pulse duration p3 = 2 micro seconds spinsys { channels 27Al nuclei 27Al 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 p1 4 variable p3 2 variable NA 20 variable deltapA 5 } proc pulseq {} { global par maxdt $par(tsw) pulse $par(p1) $par(rf) $par(phA) store 10 reset acq $par(phREC) for {set i 1} {$i < $par(np)} {incr i} { reset prop 10 pulse [expr ($i)*$par(tsw)] $par(rf) x pulse $par(p3) $par(rf3) -x acq [expr $par(phREC) - 90] } } proc main {} { global par for {set jA 0} {$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 27Al: " puts [resfreq 27Al $par(proton_frequency)] } # SIMP # NP=17 # SW=4000000 # TYPE=FID # DATA # 0 0 # 0.00200696357 4.21884749e-015 # 0.0261197166 2.55351296e-015 # 0.161117563 -1.27675648e-015 # 0.516334926 -5.50948176e-015 # 1.12654771 -7.82707232e-015 # 1.90196929 -5.88418203e-015 # 2.6600512 -2.66453526e-015 # 3.21562663 8.8817842e-016 # 3.46755336 3.77475828e-015 # 3.42859143 4.6629367e-015 # 3.18974845 2.22044605e-015 # 2.85437521 -1.77635684e-015 # 2.48952446 -5.10702591e-015 # 2.11917987 -6.21724894e-015 # 1.74912421 -5.32907052e-015 # 1.39426804 -8.8817842e-016 # END