# al-split-t1-echo-phase-filtering-p2.in # oQ -> 3Q -> 1Q -> -1Q # approach: filtering the desired coherences (3Q) after the first pulse # and (1Q) after the second pulse # spin-5/2 echo amplitude optimization # versus the second-pulse duration # in three-pulse split-t1 phase-modulated 3Q-MAS sequence, # the first-pulse duration p1 = 9 micro seconds # the third-pulse duration p3 = 2 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 rep100 gamma_angles 10 proton_frequency 800e6 start_operator 96*I1z detect_operator I1c verbose 1101 variable rf 90000 variable rf3 90000 variable p1 9 variable p3 2 } proc pulseq {} { global par maxdt $par(tsw) matrix set 1 coherence {3} matrix set 2 coherence {1} pulse $par(p1) $par(rf) x store 10 reset acq -y for {set i 1} {$i < $par(np)} {incr i} { reset prop 10 filter 1 pulse [expr ($i)*$par(tsw)] $par(rf) x filter 2 pulse $par(p3) $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 # -3.07985342 8.98047797e-16 # -9.85579627 2.59664762e-15 # -15.9036315 4.36461752e-15 # -18.3668067 4.75644949e-15 # -17.1645919 4.45268175e-15 # -14.3785118 3.88990787e-15 # -12.2391223 3.10098937e-15 # -11.5118452 4.0321601e-15 # -11.3399754 4.377918e-15 # -10.1810732 2.64482417e-15 # -7.48105973 1.66695281e-15 # -4.38104139 -8.39432426e-17 # -2.77190901 -7.871342e-16 # -4.06327694 -7.40492269e-17 # -8.09039716 1.09849699e-15 # -12.8560399 2.15131489e-15 # -15.9486759 2.27947334e-15 # -16.1749676 2.41151072e-15 # -13.973069 2.34884566e-15 # -10.8096564 2.38291211e-15 # -8.08663483 2.65275851e-15 # -6.33751458 2.96998861e-15 # -5.30053911 2.53611987e-15 # -4.58284062 1.88332368e-15 # -4.2680421 1.34963367e-15 # -4.92113574 1.74753365e-15 # -6.91609465 2.64659114e-15 # -9.71827688 2.3766252e-15 # -11.9888904 1.09950175e-15 # -12.5786063 6.98780579e-16 # -11.3827632 -9.54856844e-16 # -9.29662225 1.30023292e-15 # -7.35497174 1.42601979e-15 # END