# na-shifted-echo-antiecho-selective-phase-filtering-p2.in # approach: filtering the desired coherence (3Q) after the first pulse # and (1Q and -3Q) 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 48*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 {1 -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 23Na: " puts [resfreq 23Na $par(proton_frequency)] } # SIMP # NP=17 # SW=4000000 # TYPE=FID # DATA # 0 0 # -0.00844079727 1.40456274e-18 # -0.0300033277 3.08324729e-18 # -0.0571812947 8.06346527e-18 # -0.0822072888 5.89911509e-18 # -0.0994019864 9.51118458e-18 # -0.106368866 1.81848169e-18 # -0.103890401 -9.28735048e-18 # -0.0949440178 1.61747463e-19 # -0.0834567684 1.24433139e-17 # -0.0732547786 3.59286611e-17 # -0.0673531098 3.07861337e-18 # -0.0675200858 1.37149322e-17 # -0.0740392486 6.70069383e-18 # -0.0856996124 2.00418569e-17 # -0.100107007 1.52193288e-17 # -0.114329323 3.4214971e-17 # END