# na-zfilter-amplitude-filtering-p2.in # approach: filtering the desired coherences (-3Q and +3Q) after the first pulse # and (0Q) after the second pulse # spin-3/2 echo and antiecho amplitude optimization # versus the second-pulse duration # in three-pulse z-filtered amplitude-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 24*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 3} matrix set 2 coherence {0} 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 # -0.0106799998 2.56204716e-18 # -0.078308625 1.58186817e-17 # -0.228663597 4.22808254e-17 # -0.44281375 6.8676369e-17 # -0.667991677 9.24197758e-17 # -0.845412723 8.77656789e-17 # -0.938568579 1.547944e-16 # -0.947117716 1.86851988e-16 # -0.901631948 2.21651519e-16 # -0.845792038 2.77515198e-16 # -0.817977035 2.60584054e-16 # -0.841314211 2.13070238e-16 # -0.92365686 1.61188874e-16 # -1.06263987 1.33768114e-16 # -1.24987569 1.68353213e-16 # -1.47195351 2.52355353e-16 # END