# al-split-t1-5Q-antiecho-phase-filtering-p3.in

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

# spin-5/2 antiecho amplitude optimization
# versus the third-pulse duration
# in three-pulse split-t1 phase-modulated 5Q-MAS sequence,
# the first-pulse duration p1 = 15 micro seconds
# the second-pulse duration p2 = 8.5 micro seconds

spinsys {
  channels 27Al
  nuclei   27Al
  quadrupole 1 1 3e6 1 0 0 0
}

par {
  spin_rate        5000
  variable tsw     0.25
  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 p1      15
  variable p2      8.5
}

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

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

  acq -y        
  pulse  $par(p1) $par(rf) x
  filter 1
  pulse  $par(p2) $par(rf) x
  filter 2

  for {set i 1} {$i < $par(np)} {incr i} {
    pulse $par(tsw) $par(rf3) x 
    acq -y
  }
}

proc main {} {
  global par

  fsave [fsimpson] $par(name).fid
  puts "Larmor frequency (Hz) of 23Na: "
  puts [resfreq 27Al $par(proton_frequency)]
}

# SIMP
# NP=17
# SW=4000000
# TYPE=FID
# DATA
# 0 0
# -0.692965606 -4.66807366e-16
# -2.34556548 -1.69176847e-16
# -3.89053292 -6.27478344e-16
# -4.20563002 -1.01356898e-15
# -2.7451136 -1.71957318e-15
# 0.138834708 -1.86570107e-15
# 3.33004181 -2.19710521e-15
# 5.45813787 -1.42360237e-15
# 5.53989539 -1.2176577e-15
# 3.43589679 -3.54200982e-16
# -0.0770473195 -1.47217968e-16
# -3.62496301 1.53719926e-15
# -5.83180366 3.78384651e-15
# -5.93622941 5.30942453e-15
# -4.0957177 5.30447236e-15
# -1.23166741 3.80198822e-15
# 1.42737478 1.15223612e-15
# 2.85514985 -1.80164309e-15
# 2.63415646 -2.65815402e-15
# 1.12346483 -2.91295238e-15
# -0.740238303 -1.12914802e-15
# -1.93509519 1.14097897e-15
# -1.86353595 2.27762701e-15
# -0.61864312 1.0975859e-15
# 1.11045613 -1.48216161e-15
# 2.42905744 -4.45757367e-15
# 2.69338766 -7.07890672e-15
# 1.78420735 -6.59513933e-15
# 0.0992868159 -4.40166555e-15
# -1.67324114 -6.4257702e-16
# -2.88200196 1.42877649e-15
# -3.17902525 2.86473219e-15
# -2.60273985 8.22391704e-16
# END