# al-zfilter-amplitude-24p2p3-filtering-p2a.in # approach: filtering the desired coherences (-1Q and +5Q) after the first pulse # and -4Q 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 {-1 5} matrix set 2 coherence {-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 # 7.18342605e-05 -1.67335855e-08 # 0.000434328025 6.29692355e-07 # 0.000742483401 4.24984767e-06 # 0.000238336775 1.45767579e-05 # -0.00134020513 3.62950577e-05 # -0.00351361034 6.96451725e-05 # -0.00576034893 0.000101832811 # -0.00808143575 0.000108250419 # -0.0105536208 7.02164274e-05 # -0.0125176968 -5.5146009e-06 # -0.0127494009 -8.81753441e-05 # -0.0106232 -0.000146469391 # -0.00684032108 -0.000169603821 # -0.00290361139 -0.000166729796 # -6.72644271e-05 -0.00015243475 # 0.00118557335 -0.00013655403 # END