# al-shifted-echo-amplitude-selective-40-filtering-p2.in # approach: filtering the desired coherences (-5Q and +5Q) after the first pulse # and (5Q, 1Q, and -3Q) after the second pulse # spin-5/2 echo and antiecho amplitude optimization # versus the second-pulse duration # in three-pulse shifted-echo 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 40*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 {-5 5} matrix set 2 coherence {5 1 -3} 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 # 0.00817663886 -3.69641001e-05 # 0.0264804715 -8.795937e-05 # 0.0448885196 -6.88469842e-05 # 0.0577925279 5.5891564e-05 # 0.0657168207 0.000256355575 # 0.071915418 0.000473634585 # 0.0780538081 0.000672361822 # 0.0826211135 0.000859818168 # 0.0824252025 0.00105956505 # 0.075090186 0.00127437281 # 0.0605690073 0.00148471052 # 0.041271781 0.00168439332 # 0.0214733244 0.0019018538 # 0.00631947716 0.00216947237 # 0.000120874833 0.00246950901 # 0.0041292242 0.00271822963 # END