# al-spam-antiecho_-3Q-selective-filtering-p2.in # approach: filtering the desired coherences (-3Q) 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 -3Q-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 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 27Al: " puts [resfreq 27Al $par(proton_frequency)] } # SIMP # NP=17 # SW=4000000 # TYPE=FID # DATA # 0 0 # 0.105749995 -7.00826284e-17 # 0.984305329 -7.43967579e-16 # 2.6344356 -8.49885539e-16 # 4.26097011 -1.40334602e-15 # 5.07590211 -1.70973693e-15 # 4.72591894 -1.74739605e-15 # 3.42094263 -1.55043166e-15 # 1.73973005 -1.28524267e-15 # 0.29575889 -1.09962623e-15 # -0.517594341 -6.32080065e-16 # -0.602361359 -2.97293358e-16 # -0.0947933969 -1.1633939e-16 # 0.735598404 -4.92212315e-16 # 1.57344759 -5.1555602e-16 # 2.139452 -4.73473628e-16 # 2.28168334 -7.33737138e-17 # END