# na-spam-antiecho-selective-filtering-p2.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 second-pulse duration # in three-pulse spam 3Q-MAS sequence, # the first-pulse duration p1 = 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 p1 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} 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 23Na: " puts [resfreq 23Na $par(proton_frequency)] } # SIMP # NP=17 # SW=4000000 # TYPE=FID # DATA # 0 0 # -0.00581489554 1.74170321e-18 # -0.0346439401 2.13401219e-18 # -0.109949473 1.40556169e-17 # -0.250001957 3.39687612e-17 # -0.459167715 1.12234492e-16 # -0.724036772 1.9392679e-16 # -1.01556327 2.8478887e-16 # -1.2957407 3.87606508e-16 # -1.52606 4.74398128e-16 # -1.67517629 4.1860781e-16 # -1.72426215 4.50719789e-16 # -1.66958848 4.43329559e-16 # -1.52243797 4.89653271e-16 # -1.30660204 4.51065869e-16 # -1.05385022 3.47815057e-16 # -0.798151502 2.39019337e-16 # END