# al-split-t1-5Q-antiecho-selective-phase-filtering-p1.in

# oQ -> 5Q -> (5Q, 1Q, -3Q) -> -1Q
# approach: filtering the desired coherences (5Q) after the first pulse
#           and (5Q, 1Q, -3Q) after the second pulse

# spin-5/2 antiecho 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   80*I1z
  detect_operator  I1c
  verbose          1101
  variable rf      90000
  variable rf3     9000
  variable p2      4 
  variable p3      2 
}

proc pulseq {} {
  global par
  maxdt $par(tsw)

  matrix set 1 coherence {5}
  matrix set 2 coherence {5 1 -3}

  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
# -8.69875351e-08 -2.54803906e-17
# -2.36234994e-05 -5.23955482e-18
# -0.000481525839 1.32882241e-18
# -0.00372181289 -2.83428156e-18
# -0.0152603681 -2.30357142e-18
# -0.0409321959 -1.95297585e-17
# -0.0818707172 1.54621345e-17
# -0.129835311 -2.16603183e-16
# -0.169923833 -2.76779907e-16
# -0.189347772 5.68178087e-17
# -0.182954911 3.89445001e-17
# -0.153868798 7.88983728e-17
# -0.110628875 1.11709675e-16
# -0.0632995067 1.82939188e-16
# -0.019617513 1.19750768e-16
# 0.0177611028 -1.72864161e-16
# 0.048726404 -3.36399061e-16
# 0.0699412241 -1.81658717e-16
# 0.0738815772 -1.13600465e-16
# 0.0546809973 -1.13814893e-16
# 0.0115555146 -1.5969685e-16
# -0.0520330339 -1.77633393e-18
# -0.128581623 8.22388146e-17
# -0.206851442 1.85417314e-16
# -0.274389852 2.33965985e-16
# -0.323471451 -2.3533794e-17
# -0.352904594 -1.28166878e-16
# -0.366060615 -2.97852947e-16
# -0.368114663 -3.3202835e-16
# -0.362257396 -2.2368455e-16
# -0.350482956 -9.22926741e-17
# -0.33448021 -1.78092022e-16
# -0.316624935 -2.4921796e-16
# END