# al-spam-antiecho-5Q-selective-filtering-p1.in # approach: filtering the desired coherences (5Q) after the first pulse # and (±5Q, ±4Q, ±3Q, ±2Q, ±1Q, and 0Q) after the second pulse # spin-5/2 antiecho amplitude optimization # versus the first-pulse duration # in three-pulse spam 5Q-MAS sequence, # the second-pulse duration p2 = 4 micro seconds # the third-pulse duration p3 = 2 micro seconds spinsys { channels 27Al nuclei 27Al quadrupole 1 1 1e6 1 0 0 0 } par { spin_rate 5000 variable tsw 0.25 sw 1.0e6/tsw np 17 crystal_file rep10 gamma_angles 10 proton_frequency 800e6 start_operator 20*I1z detect_operator I1c verbose 1101 variable rf 90000 variable rf3 9300 variable p2 4 variable p3 2 } proc pulseq {} { global par maxdt $par(tsw) matrix set 1 coherence {5} matrix set 2 coherence {9 8 7 6 5 4 3 2 1 0 -1 -2 -3 -4 -5 -6 -7 -8 -9} acq -y for {set i 1} {$i < $par(np)} {incr i} { pulse $par(tsw) $par(rf) x store 2 filter 1 pulse $par(p2) $par(rf) x filter 2 pulse $par(p3) $par(rf3) x acq -y reset prop 2 } } 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 # -2.14163739e-010 -6.96676832e-017 # -1.06066969e-007 -9.3192422e-017 # -3.84850119e-006 -4.77525049e-017 # -4.72188718e-005 -1.25416659e-017 # -0.000316453997 1.84020069e-017 # -0.00143468303 4.28802909e-019 # -0.00493325325 -1.42030682e-017 # -0.0137801027 3.52299598e-018 # -0.0326970691 -4.25248894e-017 # -0.0679710543 -1.78136544e-017 # -0.126605965 6.2481102e-017 # -0.214923542 1.11191024e-017 # -0.336970649 -1.15605611e-016 # -0.493198369 -3.92548924e-016 # -0.679795664 -1.00347825e-015 # -0.888842762 -9.08383719e-016 # END