# na-spam-antiecho-selective-filtering-p1.in # approach: filtering the desired coherences (3Q) after the first pulse # and (±3Q, ±2Q, ±1Q, and 0Q) after the second pulse # spin-3/2 antiecho amplitude optimization # versus the first-pulse duration # in three-pulse spam 3Q-MAS sequence, # the second-pulse duration p2 = 4 micro seconds # the third-pulse duration p3 = 2 micro seconds spinsys { channels 23Na nuclei 23Na 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 12*I1z detect_operator I1c verbose 1101 variable rf 90000 variable rf3 9300 variable p2 4 variable p3 2 } proc pulseq {} { global par maxdt $par(tsw) matrix set 1 coherence {3} matrix set 2 coherence {9 8 7 6 5 4 3 2 1 0 -1 -2 -3 -4 -5 -6 -7 -8 -9} acq -y for {set i 1} {$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 23Na: " puts [resfreq 23Na $par(proton_frequency)] } # SIMP # NP=17 # SW=4000000 # TYPE=FID # DATA # 0 0 # -9.04226053e-06 3.49015011e-20 # -0.000277177706 -2.84730336e-18 # -0.00195517571 -2.27281645e-17 # -0.00743143578 -2.3756629e-17 # -0.019904105 -1.68371203e-17 # -0.042420099 7.18672136e-19 # -0.0769322326 -3.1299543e-17 # -0.12388041 -3.16904809e-17 # -0.182447611 9.44452583e-18 # -0.251223569 -2.62800396e-17 # -0.328803247 -3.54072065e-17 # -0.413969592 6.44130446e-17 # -0.50544926 1.39049783e-16 # -0.601537946 1.37447496e-16 # -0.699962328 1.72150329e-16 # -0.798151502 1.01562468e-16 # END