# al-split-t1-echo-phase-filtering-p1.in # oQ -> 3Q -> 1Q -> -1Q # approach: filtering the desired coherences (3Q) after the first pulse # and (1Q) after the second pulse # spin-5/2 echo amplitude optimization # versus the first-pulse duration # in three-pulse split-t1 phase-modulated 3Q-MAS sequence, # the second-pulse duration p2 = 4 micro seconds # the third-pulse duration p3 = 2 micro seconds spinsys { channels 27Al nuclei 27Al quadrupole 1 1 3e6 1 0 0 0 } par { spin_rate 5000 variable tsw 0.5 sw 1.0e6/tsw np 34 crystal_file rep100 gamma_angles 10 proton_frequency 800e6 start_operator 96*I1z detect_operator I1c verbose 1101 variable rf 90000 variable rf3 90000 variable p2 4 variable p3 2 } proc pulseq {} { global par maxdt $par(tsw) matrix set 1 coherence {3} matrix set 2 coherence {1} acq -y for {set i 1} {$i < $par(np)} {incr i} { pulse $par(tsw) $par(rf) x store 2 filter 1 pulse $par(p2) $par(rf) x filter 2 pulse $par(p3) $par(rf3) x acq -y reset prop 2 } } proc main {} { global par fsave [fsimpson] $par(name).fid puts "Larmor frequency (Hz) of 27Al: " puts [resfreq 27Al $par(proton_frequency)] } # SIMP # NP=17 # SW=4000000 # TYPE=FID # DATA # 0 0 # -0.0341353219 -1.25428761e-16 # -0.623744102 7.93546541e-17 # -2.78363129 6.73115035e-16 # -5.33018905 1.23050975e-15 # -5.95004287 9.40362941e-16 # -5.5143845 5.34673225e-16 # -5.74375572 1.41976859e-15 # -7.02360225 4.85166153e-16 # -8.99499755 1.20484095e-15 # -11.169211 3.14509714e-15 # -11.977791 3.45201372e-15 # -11.5447503 2.37401661e-15 # -11.4510079 1.48991729e-15 # -11.6882855 2.24576887e-15 # -12.2563181 2.38078103e-15 # -12.7166552 1.49317847e-15 # -12.8342944 1.74140468e-15 # -12.8356104 2.79420336e-15 # -12.7934287 2.78858639e-15 # -12.7930292 2.55429946e-15 # -11.9634523 1.19996963e-15 # -10.6220506 9.20234574e-16 # -9.44803861 7.39848504e-16 # -8.53279158 1.37880776e-15 # -8.05517626 1.95089549e-15 # -7.88079997 1.65071668e-15 # -7.56359583 3.98019012e-16 # -6.67314636 5.06916819e-17 # -5.3197667 1.74208089e-15 # -3.9620822 1.91493133e-15 # -2.86453618 1.32552949e-15 # -2.16280818 8.69365025e-17 # -1.84411501 3.50299295e-16 # END