# al-zfilter-amplitude-24p2p3-filtering-p3c.in # approach: filtering the desired coherences (-3Q and +3Q) after the first pulse # and (0Q) after the second pulse # spin-5/2 echo and antiecho amplitude optimization # versus the third-pulse duration # in three-pulse z-filtered amplitude-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 rep100 gamma_angles 10 proton_frequency 800e6 start_operator 24*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 3} matrix set 2 coherence {0} 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 # -0.0705186785 4.28736563e-05 # -0.142332167 0.000172219143 # -0.216432208 0.000388818604 # -0.293274657 0.000692961134 # -0.372665272 0.00108419424 # -0.4537799 0.00156135949 # -0.535301911 0.00212301956 # -0.615635134 0.00276815227 # -0.693140756 0.00349676253 # -0.766351432 0.00430998069 # -0.834130723 0.00520933742 # -0.895767455 0.00619519386 # -0.951014087 0.00726467778 # -1.00008594 0.00840978615 # -1.04363354 0.00961640143 # -1.0826886 0.0108647874 # END