# al-zfilter-phase-selective-filtering-p3.in # approach: filtering the desired coherence (+3Q) after the first pulse # and (0Q -4Q, and 4Q) after the second pulse # spin-5/2 echo amplitude optimization # versus the third-pulse duration # in three-pulse z-filtered phase-modulated 3Q-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 rep10 gamma_angles 10 proton_frequency 800e6 start_operator 48*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 {3} matrix set 2 coherence {0 -4 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 # -0.0667586501 0.00182905039 # -0.135225389 0.00374575312 # -0.20700088 0.00574823355 # -0.283076292 0.00783481133 # -0.363516154 0.0100040656 # -0.447496571 0.0122548337 # -0.53360165 0.0145855843 # -0.620167913 0.0169930968 # -0.705499628 0.0194715175 # -0.787931541 0.0220131433 # -0.865870457 0.024610878 # -0.937948667 0.0272607152 # -1.00328324 0.0299625231 # -1.06171775 0.0327186409 # -1.11392144 0.035531162 # -1.16130556 0.0383993359 # END