# al-spam-antiecho-5Q-selective-filtering-p2.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 second-pulse duration # in three-pulse spam 5Q-MAS sequence, # the first-pulse duration p1 = 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 p1 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} 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 # -0.000555209525 -4.06930703e-019 # -0.00768135288 -2.63862622e-018 # -0.0423987662 -5.81284416e-018 # -0.142857272 8.84494685e-018 # -0.34890053 4.31302244e-017 # -0.673206018 5.33539821e-017 # -1.07726623 8.96555741e-017 # -1.47202573 2.11054255e-016 # -1.74920842 2.3771954e-016 # -1.82938128 2.25524892e-016 # -1.70073098 -4.48199679e-017 # -1.42686709 -4.45022856e-017 # -1.11957592 -3.32513497e-016 # -0.891495762 -5.33685701e-016 # -0.812537666 -6.05673666e-016 # -0.888842762 -4.24385946e-016 # END