# al-zfilter-5Q-amplitude-filtering-p3.in # approach: filtering the desired coherences (-5Q and +5Q) after the first pulse # and (0Q) 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 rep10 gamma_angles 10 proton_frequency 800e6 start_operator 100*I1z detect_operator I1c verbose 1101 variable rf 90000 variable rf3 93000 variable p1 4 variable p2 4 } proc pulseq {} { global par maxdt $par(tsw) matrix set 1 coherence {-5 5} 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 # -1.09948769 0.000436225738 # -1.96013135 0.00139506572 # -2.42810097 0.00205625649 # -2.48781819 0.00155288552 # -2.25489229 -0.00086506078 # -1.90627592 -0.00591030116 # -1.5882431 -0.014089065 # -1.36123207 -0.0250674266 # -1.20815254 -0.0371071752 # -1.07955653 -0.0473163043 # -0.931503781 -0.0527760618 # -0.741483418 -0.0518421789 # -0.51497676 -0.0448978559 # -0.285198742 -0.0343340147 # -0.0939007841 -0.0238552521 # 0.0398455182 -0.017273945 # END