# al-shifted-echo-amplitude-80-filtering-p2.in # approach: filtering the desired coherences (-5Q and +5Q) after the first pulse # and (1Q) 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 80*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 {-5 5} matrix set 2 coherence {1} 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 # 0.00168907244 -3.99501044e-06 # 0.020332198 -5.32620855e-05 # 0.061909135 -7.37542553e-05 # 0.0773142993 0.000494600035 # -0.0170463895 0.00247641894 # -0.259227449 0.00597296522 # -0.589522064 0.00967789115 # -0.883937331 0.0114817286 # -1.0402319 0.0100415966 # -1.03737922 0.00599780695 # -0.924238843 0.00168718325 # -0.761479336 -0.00063564235 # -0.576259699 -0.000628885772 # -0.366798082 7.01785296e-05 # -0.140249829 -0.000221212954 # 0.0651817992 -0.00124818717 # END