# al-zfilter-phase-selective-filtering-p2.in # approach: filtering the desired coherence (+3Q) after the first pulse # and (0Q -4Q, and 4Q) after the second pulse # spin-5/2 echo amplitude optimization # versus the second-pulse duration # in three-pulse z-filtered phase-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 rep10 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 {0 -4 4} 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 # -0.17497637 0.000101154792 # -1.22817016 0.000469839957 # -3.32665839 0.000427076041 # -5.83174916 -0.000994276217 # -7.79068849 -0.00328604219 # -8.47983254 -0.0040579956 # -7.64748675 -0.00168108336 # -5.5150094 0.00204696898 # -2.71188202 0.00326878816 # -0.115011059 0.000352487657 # 1.48091159 -0.00385240993 # 1.74889385 -0.0045111808 # 1.00559451 0.000453596314 # -0.0179636817 0.00846883585 # -0.650352278 0.0149400348 # -0.620167913 0.0169930968 # END