# al-zfilter-5Q-amplitude-selective-filtering-p3a.in # approach: filtering the desired coherences (-1Q) after the first pulse # and (4Q) after the second pulse # spin-5/2 echo and antiecho amplitude optimization # versus the first-pulse duration # in three-pulse z-filtered amplitude-modulated 5Q-MAS sequence, # the first-pulse duration p1 = 4 micro seconds # the second-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 rep100 gamma_angles 10 proton_frequency 800e6 start_operator 40*I1z detect_operator I1c verbose 1101 variable rf 90000 variable rf3 9300 variable p1 4 variable p2 4 } proc pulseq {} { global par maxdt $par(tsw) matrix set 1 coherence {-1} matrix set 2 coherence {4} 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 27Al: " puts [resfreq 27Al $par(proton_frequency)] } # SIMP # NP=17 # SW=4000000 # TYPE=FID # DATA # 0 0 # 2.74185396e-09 5.86947189e-12 # 9.58609964e-08 1.55228877e-10 # 7.59613163e-07 9.85429183e-10 # 3.20830517e-06 3.75922718e-09 # 9.49510265e-06 1.16432559e-08 # 2.2358519e-05 3.19882856e-08 # 4.50075622e-05 7.81754877e-08 # 8.10364279e-05 1.68553622e-07 # 0.000134480694 3.21512699e-07 # 0.000209877096 5.48859584e-07 # 0.000312207866 8.51007106e-07 # 0.000446777327 1.21559551e-06 # 0.000619176338 1.61861042e-06 # 0.000835391449 2.02628524e-06 # 0.00110193737 2.39698868e-06 # 0.00142583497 2.68374599e-06 # END