# al-split-t1-5Q-echo-phase-filtering-p3.in # oQ -> -5Q -> 1Q -> -1Q # approach: filtering the desired coherences (-5Q) after the first pulse # and (+1Q) after the second pulse # spin-5/2 echo amplitude optimization # versus the third-pulse duration # in three-pulse split-t1 phase-modulated 5Q-MAS sequence, # the first-pulse duration p1 = 13.5 micro seconds # the second-pulse duration p2 = 4.75 micro seconds spinsys { channels 27Al nuclei 27Al quadrupole 1 1 3e6 1 0 0 0 } par { spin_rate 5000 variable tsw 0.25 sw 1.0e6/tsw np 34 crystal_file rep10 gamma_angles 10 proton_frequency 800e6 start_operator 160*I1z detect_operator I1c verbose 1101 variable rf 90000 variable rf3 90000 variable p1 13.5 variable p2 4.75 } proc pulseq {} { global par maxdt $par(tsw) matrix set 1 coherence {-5} matrix set 2 coherence {1} 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 23Na: " puts [resfreq 27Al $par(proton_frequency)] } # SIMP # NP=17 # SW=4000000 # TYPE=FID # DATA # 0 0 # 0.306924457 -4.00551352e-16 # 1.16881422 -1.45442719e-15 # 2.39600832 -2.37873724e-15 # 3.69892835 -3.52397262e-15 # 4.75990322 -4.34938299e-15 # 5.32200414 -4.14196971e-15 # 5.26622925 -3.62414621e-15 # 4.64679627 -2.90666853e-15 # 3.66643978 -1.8377943e-15 # 2.59782633 -1.54148214e-15 # 1.68320572 -1.53839529e-15 # 1.05676313 -1.68060677e-15 # 0.722032733 -1.55094115e-15 # 0.585896559 -2.08871099e-15 # 0.522543493 -2.13248274e-15 # 0.433589773 -1.50517095e-15 # 0.284238697 6.75356813e-16 # 0.113794503 3.28202079e-15 # 0.0245058699 4.22769234e-15 # 0.146571519 3.07673193e-15 # 0.579613882 3.01203501e-17 # 1.33003916 -3.86443312e-15 # 2.27865623 -7.68772075e-15 # 3.20344746 -9.07581376e-15 # 3.85370165 -7.99613106e-15 # 4.04283835 -5.16632099e-15 # 3.7155103 -1.83720044e-15 # 2.96150204 4.8358924e-16 # 1.98374923 1.70987613e-15 # 1.04324883 7.83789472e-16 # 0.388280461 -1.74194663e-15 # 0.170595016 -3.50538407e-15 # 0.378560818 -3.75946581e-15 # END