# al-split-t1-antiecho-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 antiecho amplitude optimization # versus the second-pulse duration # in three-pulse split-t1 phase-modulated -3Q-MAS sequence, # the first-pulse duration p1 = 8.5 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 8.5 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 # 0.0364136081 -7.71854981e-17 # 0.503186364 -9.92892837e-17 # 2.03618896 -3.76692215e-16 # 4.79112583 -8.75778131e-16 # 8.05606263 -1.14118786e-15 # 10.4944391 -1.40990675e-15 # 11.0144712 -1.10655528e-15 # 9.57874264 -7.44883295e-16 # 7.22066301 -6.86185846e-16 # 5.36968889 -1.12501854e-15 # 4.98229825 -8.07846323e-16 # 6.04271749 -8.43598465e-16 # 7.79020551 -8.97634951e-16 # 9.36307958 -8.28988565e-16 # 10.2869862 1.35061165e-17 # 10.5268108 -9.44265328e-17 # 10.1899754 3.88093626e-16 # 9.25035811 9.81960244e-16 # 7.59049258 9.66622188e-16 # 5.30319099 1.09255232e-15 # 2.91265816 7.29302145e-16 # 1.21603356 1.11795175e-15 # 0.820179658 1.00626211e-15 # 1.72807057 2.09342025e-16 # 3.30825661 -1.10056748e-15 # 4.72163398 -2.28389801e-15 # 5.4651558 -2.9329611e-15 # 5.60355679 -2.7146597e-15 # 5.56827051 -2.44972803e-15 # 5.71234177 -1.75395402e-15 # 6.01920852 -1.3241255e-15 # 6.22590969 -7.4500607e-16 # 6.14102925 6.40439737e-16 # END