# al-zfilter-phase-filtering-p3.in # approach: filtering the desired coherence (+3Q) after the first pulse # and (0Q) after the second pulse # spin-5/2 echo amplitude optimization # versus the third-pulse duration # in three-pulse z-filtered phase-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 48*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 {3} 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 # -0.92469715 0.0179834754 # -2.97691766 0.0374357884 # -6.42425803 0.0572745688 # -10.4813991 0.0746637264 # -13.835355 0.0866373643 # -15.3711065 0.0910204565 # -14.6308765 0.0861843515 # -11.9110641 0.0719022946 # -8.12178805 0.0510434929 # -4.42455744 0.0293208659 # -1.69761173 0.0120886941 # -0.151139781 0.000463177851 # 0.620823841 -0.0091332985 # 1.21748841 -0.0210584743 # 1.96775073 -0.0362968452 # 2.74576398 -0.0514176195 # END