# al-shifted-echo-amplitude-selective-24-filtering-p2.in # approach: filtering the desired coherences (-3Q and +3Q) after the first pulse # and (+1Q, +5Q, and -3Q) after the second pulse # spin-5/2 echo and antiecho amplitude optimization # versus the second-pulse duration # in three-pulse shifted-echo amplitude-modulated 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 24*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 3} matrix set 2 coherence {1 5 -3} 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 # 0.562423296 -2.71675391e-17 # 0.301196813 -3.47477411e-17 # 0.00926624628 6.25545906e-17 # -0.183883824 2.03030111e-16 # -0.212923508 1.59743086e-16 # -0.102034226 1.0253565e-16 # 0.0629171045 1.61610267e-18 # 0.187891455 9.56152172e-18 # 0.214497662 -1.29458785e-16 # 0.135579409 -1.42180779e-16 # -0.013672484 -1.4951936e-17 # -0.175181903 1.12168793e-16 # -0.28828663 1.59021515e-16 # -0.308837081 1.53364835e-16 # -0.226084487 -8.59031835e-17 # -0.0711900543 -3.29515305e-16 # END