# al-zfilter-amplitude-24p2p3-filtering-p3a.in # approach: filtering the desired coherences (-1Q and +5Q) after the first pulse # and (-4Q) 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 {-1 5} 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 # 3.9052723e-05 3.57263675e-08 # 0.000266168384 6.20697286e-08 # 0.000702141178 -1.09684682e-06 # 0.00118788814 -6.39713611e-06 # 0.00151288507 -1.99922018e-05 # 0.00156462125 -4.56829822e-05 # 0.00139526342 -8.50123428e-05 # 0.00118557335 -0.00013655403 # 0.0011289415 -0.000197465459 # 0.00133512114 -0.00026555663 # 0.00185264144 -0.000339705055 # 0.00274804702 -0.000419328287 # 0.00411889121 -0.000504433426 # 0.00603651065 -0.000596142959 # 0.00848509101 -0.000697035403 # 0.0113532866 -0.000810465188 # END