# al-split-t1-antiecho-phase-filtering-p3.in # oQ -> -3Q -> 1Q -> -1Q # approach: filtering the desired coherences (-3Q) after the first pulse # and (+1Q) after the second pulse # spin-5/2 antiecho amplitude optimization # versus the third-pulse duration # in three-pulse split-t1 phase-modulated -3Q-MAS sequence, # the first-pulse duration p1 = 8.5 micro seconds # the second-pulse duration p2 = 1.7 micro seconds spinsys { channels 27Al nuclei 27Al quadrupole 1 1 3e6 1 0 0 0 } par { spin_rate 5000 variable tsw 0.25 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 p1 8.5 variable p2 1.7 } proc pulseq {} { global par maxdt $par(tsw) matrix set 1 coherence {-3} matrix set 2 coherence {1} acq -y pulse $par(p1) $par(rf) x filter 1 pulse $par(p2) $par(rf) x filter 2 for {set i 1} {$i < $par(np)} {incr i} { pulse $par(tsw) $par(rf3) x acq -y } } proc main {} { global par fsave [fsimpson] $par(name).fid puts "Larmor frequency (Hz) of 23Na: " puts [resfreq 27Al $par(proton_frequency)] } # SIMP # NP=17 # SW=4000000 # TYPE=FID # DATA # 0 0 # 0.0724329554 -2.01410558e-16 # 0.300928909 -6.91991001e-16 # 0.711310799 -1.2593812e-15 # 1.49161917 -1.57834901e-15 # 2.97402213 -1.69064299e-15 # 5.37301988 -1.46360344e-15 # 8.40679076 -1.06573243e-15 # 11.084367 -8.50381396e-16 # 12.0107867 -8.26879654e-16 # 10.1769202 -9.22270151e-16 # 5.74160458 -1.13157054e-15 # 0.211877884 -1.09052771e-15 # -4.23246672 -7.43682658e-16 # -5.90082425 -7.13357592e-16 # -4.50126772 -7.79488172e-16 # -1.22016794 -8.64040688e-16 # 2.07216674 -7.94117637e-16 # 3.94348779 -6.75697594e-16 # 4.11434274 -6.2024364e-16 # 3.37502004 -5.32174793e-16 # 2.87290819 -8.06072605e-16 # 3.32499847 -9.48010773e-16 # 4.65143897 -1.31363171e-15 # 6.1469964 -1.77925988e-15 # 6.96668255 -2.19327291e-15 # 6.57743002 -2.73266621e-15 # 4.94797795 -3.04640285e-15 # 2.47541548 -2.6815524e-15 # -0.213721717 -1.82791821e-15 # -2.45655792 -5.76522047e-16 # -3.71888398 2.93247003e-16 # -3.75157664 7.11792506e-16 # -2.68409882 3.33810895e-16 # END