# al-zfilter-phase-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 48*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 # 0.0446061528 0.000107620459 # 0.486987975 0.000570407337 # 1.71284739 0.00134014289 # 3.62883336 0.00282371943 # 5.86336501 0.00461240859 # 8.16917036 0.00242089182 # 10.2991233 -0.00995325886 # 11.5815436 -0.0322480407 # 10.9702851 -0.0533921981 # 7.81423941 -0.0592768217 # 2.61591751 -0.0450355137 # -3.10379048 -0.0180906805 # -7.79566439 0.0104118201 # -10.745359 0.0349855086 # -12.0254386 0.0557417478 # -11.9110641 0.0719022946 # END