# al-split-t1-5Q-antiecho-selective-phase-filtering-p2.in # oQ -> 5Q -> (5Q, 1Q, -3Q) -> -1Q # approach: filtering the desired coherences (5Q) after the first pulse # and (5Q, 1Q, -3Q) after the second pulse # spin-5/2 antiecho amplitude optimization # versus the second-pulse duration # in three-pulse split-t1 phase-modulated 5Q-MAS sequence, # the first-pulse duration p1 = 15 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 0.5 sw 1.0e6/tsw np 34 crystal_file rep10 gamma_angles 10 proton_frequency 800e6 start_operator 80*I1z detect_operator I1c verbose 1101 variable rf 90000 variable rf3 9000 variable p1 15 variable p3 2 } proc pulseq {} { global par maxdt $par(tsw) matrix set 1 coherence {5} matrix set 2 coherence {5 1 -3} 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 # -0.00674569145 7.83526764e-19 # -0.0701683573 1.18133863e-17 # -0.202336336 6.29495178e-17 # -0.31579521 9.58860212e-17 # -0.348997635 1.95356683e-17 # -0.353073526 2.84076373e-16 # -0.370123 -5.61598559e-17 # -0.362257396 4.44157847e-17 # -0.263066512 1.37242356e-16 # -0.14264639 -3.38715737e-16 # -0.160509069 -4.91752952e-16 # -0.2960993 2.43993809e-16 # -0.385601835 5.80497871e-16 # -0.384032606 -5.25347009e-17 # -0.364795489 -7.70436536e-16 # -0.372850722 -3.28970123e-16 # -0.358050805 -1.96334187e-16 # -0.285750698 -1.10876147e-16 # -0.237992189 -9.94562469e-18 # -0.263402609 1.50420157e-16 # -0.286368646 2.2243599e-16 # -0.252356509 7.0103837e-17 # -0.216217311 5.84072593e-16 # -0.264097776 7.34912972e-16 # -0.378149639 4.32664434e-16 # -0.448829159 5.4786588e-16 # -0.427384399 2.96890122e-17 # -0.363100187 1.14303826e-16 # -0.330836688 1.69119671e-16 # -0.331210593 2.20934173e-16 # -0.318456955 -2.05754772e-17 # -0.302693366 -1.36813899e-16 # -0.340565849 -4.26608566e-17 # END