# al-zfilter-phase-p1p3-cycling-p3.in

# approach: 48-phase cycling the first pulse, the third pulse and the receiver

# spin-5/2 echo amplitude optimization
# versus the third-pulse duration
# in three-pulse z-filtered phase-modulated +3Q-MAS sequence,
# the first-pulse duration p1 = 4 micro seconds
# the second-pulse duration p2 = 4 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     rep100
  gamma_angles     10
  proton_frequency 800e6
  start_operator   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) x

  for {set i 1} {$i < $par(np)} {incr i} {
    pulse $par(tsw) $par(rf3) $par(ph3) 
    acq $par(ph31)
  }
}

proc main {} {
  global par

  foreach p {{  0   0  270}\
             { 30   0  180}\
             { 60   0   90}\
             { 90   0    0}\
             {120   0  270}\
             {150   0  180}\
             {180   0   90}\
             {210   0    0}\
             {240   0  270}\
             {270   0  180}\
             {300   0   90}\
             {330   0    0}\
             {  0  90    0}\
             { 30  90  270}\
             { 60  90  180}\
             { 90  90   90}\
             {120  90    0}\
             {150  90  270}\
             {180  90  180}\
             {210  90   90}\
             {240  90    0}\
             {270  90  270}\
             {300  90  180}\
             {330  90   90}\
             {  0 180   90}\
             { 30 180    0}\
             { 60 180  270}\
             { 90 180  180}\
             {120 180   90}\
             {150 180    0}\
             {180 180  270}\
             {210 180  180}\
             {240 180   90}\
             {270 180    0}\
             {300 180  270}\
             {330 180  180}\
             {  0 270  180}\
             { 30 270   90}\
             { 60 270    0}\
             { 90 270  270}\
             {120 270  180}\
             {150 270   90}\
             {180 270    0}\
             {210 270  270}\
             {240 270  180}\
             {270 270   90}\
             {300 270    0}\
             {330 270  270}} {
    set par(ph1)  [lindex $p 0]
    set par(ph3)  [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 27Al: "
  puts [resfreq 27Al $par(proton_frequency)]
}

# SIMP
# NP=17
# SW=4000000
# TYPE=FID
# DATA
# 0 0
# -0.947460744 0.0174687972
# -3.23848134 0.0338801289
# -7.39946437 0.0479583817
# -12.622669 0.0597242191
# -17.1995953 0.0702688012
# -19.5041969 0.079352289
# -18.7922658 0.0836505649
# -15.4382008 0.0792932812
# -10.6773703 0.0661856862
# -6.0201157 0.0488858702
# -2.56648629 0.0330422846
# -0.587228735 0.0209786758
# 0.393175636 0.0109789852
# 1.10040318 0.000443125849
# 1.95017738 -0.0114123901
# 2.80782309 -0.0231088101
# END