# na-shifted-echo-antiecho-phase-filtering-p2.in # approach: filtering the desired coherence (3Q) after the first pulse # and (1Q) after the second pulse # spin-3/2 echo amplitude optimization # versus the second-pulse duration # in three-pulse shifted-echo phase-modulated 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 rep100 gamma_angles 10 proton_frequency 800e6 start_operator 96*I1z detect_operator I1c verbose 1101 variable rf 90000 variable rf3 93000 variable p1 4 variable p3 2 } proc pulseq {} { global par maxdt $par(tsw) matrix set 1 coherence {3} matrix set 2 coherence {1} 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 # -0.503311601 1.17718742e-16 # -1.77984938 3.6661181e-16 # -3.37423982 6.97600424e-16 # -4.8343665 9.14387381e-16 # -5.85601049 7.99895864e-16 # -6.34149058 1.07694197e-15 # -6.36728032 1.11153924e-15 # -6.09982507 1.22522003e-15 # -5.71231714 8.97712579e-16 # -5.33655679 1.29227686e-15 # -5.05216153 9.41236956e-16 # -4.89380392 8.27532349e-16 # -4.85723411 8.1603824e-16 # -4.90007695 9.05651267e-16 # -4.94735005 9.36526811e-16 # -4.91200417 1.01305609e-15 # END