# al-split-t1-5Q-echo-phase-filtering-p1.in # oQ -> -5Q -> 1Q -> -1Q # approach: filtering the desired coherences (-5Q) after the first pulse # and (1Q) after the second pulse # spin-5/2 echo amplitude optimization # versus the first-pulse duration # in three-pulse split-t1 phase-modulated 5Q-MAS sequence, # the second-pulse duration p2 = 4 micro seconds # the third-pulse duration p3 = 2 micro seconds spinsys { channels 27Al nuclei 27Al quadrupole 1 1 3e6 1 0 0 0 } par { spin_rate 5000 variable tsw 0.5 sw 1.0e6/tsw np 34 crystal_file rep10 gamma_angles 10 proton_frequency 800e6 start_operator 160*I1z detect_operator I1c verbose 1101 variable rf 90000 variable rf3 90000 variable p2 4 variable p3 2 } proc pulseq {} { global par maxdt $par(tsw) matrix set 1 coherence {-5} matrix set 2 coherence {1} acq -y for {set i 1} {$i < $par(np)} {incr i} { pulse $par(tsw) $par(rf) x store 2 filter 1 pulse $par(p2) $par(rf) x filter 2 pulse $par(p3) $par(rf3) x acq -y reset prop 2 } } 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 # 1.34229532e-06 1.98390712e-16 # 0.000382444094 1.48157292e-16 # 0.0078618998 5.56083653e-17 # 0.064464131 -1.58221197e-16 # 0.288092813 -5.82071544e-16 # 0.773671356 -4.16898717e-16 # 1.37628568 -1.26659776e-15 # 1.79294308 -1.68537064e-16 # 1.8958684 1.20042916e-15 # 1.79814074 1.52739129e-15 # 1.65550539 8.27916449e-16 # 1.54217929 -1.22777137e-16 # 1.47824636 -9.38334447e-16 # 1.4771626 -1.68488364e-15 # 1.53269598 -2.60514032e-15 # 1.59733862 -1.78220456e-15 # 1.64046333 -3.53040228e-16 # 1.67429122 2.01638821e-15 # 1.68721399 2.84768123e-15 # 1.64358884 3.15845966e-15 # 1.58359163 1.55951943e-15 # 1.62691618 -4.05751648e-16 # 1.83649461 -2.62181268e-15 # 2.13566974 -2.5469901e-15 # 2.37606122 -2.2030683e-17 # 2.48355882 8.14924473e-16 # 2.49982262 8.16292564e-16 # 2.46411229 2.52421459e-15 # 2.37173255 1.65265745e-15 # 2.23997292 2.1111627e-15 # 2.10332842 -8.6637176e-16 # 1.93797142 -8.1939252e-16 # 1.68091988 -8.23139939e-16 # END