# al-spam-antiecho-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 # -0.000555209525 -3.16413562e-015 # -0.00768135288 -3.05311332e-016 # -0.0423987662 2.88657986e-015 # -0.142857272 3.88578059e-015 # -0.34890053 2.66453526e-015 # -0.673206018 2.22044605e-016 # -1.07726623 -8.8817842e-016 # -1.47202573 -1.77635684e-015 # -1.74920842 0 # -1.82938128 2.22044605e-015 # -1.70073098 3.33066907e-015 # -1.42686709 4.6629367e-015 # -1.11957592 3.10862447e-015 # -0.891495762 8.8817842e-016 # -0.812537666 -1.11022302e-015 # -0.888842762 -2.88657986e-015 # END