# al-zfilter-5Q-amplitude-filtering-p2.in # approach: filtering the desired coherences (-5Q and +5Q) after the first pulse # and (0Q) after the second pulse # spin-5/2 echo and antiecho amplitude optimization # versus the second-pulse duration # in three-pulse z-filtered amplitude-modulated 5Q-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 2 3e6 0 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 100*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 {-5 5} 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 27Al: " puts [resfreq 27Al $par(proton_frequency)] } # SIMP # NP=17 # SW=4000000 # TYPE=FID # DATA # 0 0 # 0.00032357845 -4.61130678e-07 # 0.00900225373 -3.84968603e-05 # 0.0539979332 -0.000419631719 # 0.161713365 -0.00194394253 # 0.310843092 -0.00540028339 # 0.420356267 -0.0103971936 # 0.400809216 -0.0147703633 # 0.226169894 -0.0155538072 # -0.0431774107 -0.0111002646 # -0.307245793 -0.00284064251 # -0.498378015 0.00488941477 # -0.618464788 0.00734563169 # -0.721296989 0.00257422418 # -0.865872374 -0.00730180784 # -1.08094735 -0.0177860162 # -1.36123207 -0.0250674266 # END