# al-zfilter-amplitude-24p2p3-filtering-p2c.in # approach: filtering the desired coherences (-3Q and +3Q) 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 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 2 3e6 0 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 9300 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 27Al: " puts [resfreq 27Al $par(proton_frequency)] } # SIMP # NP=17 # SW=4000000 # TYPE=FID # DATA # 0 0 # -0.168766388 0.000130748863 # -1.18931069 0.000931187186 # -3.23688297 0.00258054764 # -5.70021525 0.00466725129 # -7.63335554 0.00636216374 # -8.29152482 0.00677340087 # -7.40816664 0.00554615046 # -5.2221416 0.00321604375 # -2.40249353 0.000830343464 # 0.137022144 -0.000784275486 # 1.59705967 -0.00136460776 # 1.7088486 -0.00104021109 # 0.879101096 -7.45556423e-05 # -0.130131763 0.00119405433 # -0.6979606 0.00229982172 # -0.615635134 0.00276815227 # END