# al-zfilter-phase-72-filtering-p2.in # approach: filtering the desired coherence (+3Q) after the first pulse # and (0Q) 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 rep100 gamma_angles 10 proton_frequency 800e6 start_operator 72*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} 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 # 0.0669092292 0.000161430688 # 0.730481963 0.000855611005 # 2.56927108 0.00201021433 # 5.44325004 0.00423557914 # 8.79504752 0.00691861288 # 12.2537555 0.00363133773 # 15.4486849 -0.0149298883 # 17.3723154 -0.048372061 # 16.4554277 -0.0800882972 # 11.7213591 -0.0889152325 # 3.92387627 -0.0675532705 # -4.65568572 -0.0271360207 # -11.6934966 0.0156177302 # -16.1180385 0.0524782629 # -18.0381578 0.0836126217 # -17.8665962 0.107853442 # END