# na-zfilter-amplitude-p2-12-cycling-p3.in

# approach: 12-phase cycling the first pulse, the second pulse and the receiver

# spin-3/2 echo and antiecho amplitude optimization
# versus the third-pulse duration
# in three-pulse z-filtered amplitude-modulated 3Q-MAS sequence,
# the first-pulse duration p1 = 4 micro seconds
# the second-pulse duration p2 = 4 micro seconds

spinsys {
  channels 23Na
  nuclei   23Na
  quadrupole 1 1 1e6 1 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   2*I1z
  detect_operator  I1c
  verbose          1101
  variable rf      90000
  variable rf3     93000
  variable p1      4 
  variable p2      4 
}

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

  acq $par(ph31)
  pulse  $par(p1) $par(rf) $par(ph1)
  pulse  $par(p2) $par(rf) $par(ph2) 

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

    acq $par(ph31)
  }
}

proc main {} {
  global par

  foreach p {{  0   0  270}\
             { 60   0   90}\
             {120   0  270}\
             {180   0   90}\
             {240   0  270}\
             {300   0   90}\
             {  0 180   90}\
             { 60 180  270}\
             {120 180   90}\
             {180 180  270}\
             {240 180   90}\
             {300 180  270}} {
    set par(ph1)  [lindex $p 0]
    set par(ph2)  [lindex $p 1]
    set par(ph31) [lindex $p 2]

    set g [fsimpson]
    if [info exists f] {
      fadd $f $g
      funload $g
    } else {
      set f $g
    }
  }

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

# SIMP
# NP=17
# SW=4000000
# TYPE=FID
# DATA
# 0 0
# 0.296992818 -8.9338259e-17
# 0.155388552 -5.30825384e-16
# -0.326206023 -7.07767178e-16
# -0.936828565 -1.2490009e-15
# -1.45040583 -1.41553436e-15
# -1.70784554 -1.19348975e-15
# -1.65153612 -9.99200722e-16
# -1.31087705 -6.10622664e-16
# -0.762539947 -1.66533454e-16
# -0.0947291876 1.11022302e-16
# 0.608223358 7.77156117e-16
# 1.26361142 1.06858966e-15
# 1.78465683 1.27705463e-15
# 2.08406812 1.29757316e-15
# 2.08951649 1.76247905e-15
# 1.76413725 1.77635684e-15
# END