# al-zfilter-72-phase-p1p2-cycling-p3.in

# approach: 72-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) $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}\
             { 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  60   90}\
             { 30  60    0}\
             { 60  60  270}\
             { 90  60  180}\
             {120  60   90}\
             {150  60    0}\
             {180  60  270}\
             {210  60  180}\
             {240  60   90}\
             {270  60    0}\
             {300  60  270}\
             {330  60  180}\
             {  0 120  270}\
             { 30 120  180}\
             { 60 120   90}\
             { 90 120    0}\
             {120 120  270}\
             {150 120  180}\
             {180 120   90}\
             {210 120    0}\
             {240 120  270}\
             {270 120  180}\
             {300 120   90}\
             {330 120    0}\
             {  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}\
             {  0 240  270}\
             { 30 240  180}\
             { 60 240   90}\
             { 90 240    0}\
             {120 240  270}\
             {150 240  180}\
             {180 240   90}\
             {210 240    0}\
             {240 240  270}\
             {270 240  180}\
             {300 240   90}\
             {330 240    0}\
             {  0 300   90}\
             { 30 300    0}\
             { 60 300  270}\
             { 90 300  180}\
             {120 300   90}\
             {150 300    0}\
             {180 300  270}\
             {210 300  180}\
             {240 300   90}\
             {270 300    0}\
             {300 300  270}\
             {330 300  180}} {
    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 27Al: "
  puts [resfreq 27Al $par(proton_frequency)]
}

# SIMP
# NP=17
# SW=4000000
# TYPE=FID
# DATA
# 0 0
# -1.38704573 0.0269752131
# -4.46537649 0.0561536826
# -9.63638704 0.0859118532
# -15.7220987 0.11199559
# -20.7530325 0.129956046
# -23.0566598 0.136530685
# -21.9463147 0.129276527
# -17.8665962 0.107853442
# -12.1826821 0.0765652393
# -6.63683616 0.0439812989
# -2.54641759 0.0181330412
# -0.226709672 0.000694766776
# 0.931235762 -0.0136999478
# 1.82623261 -0.0315877115
# 2.9516261 -0.0544452678
# 4.11864597 -0.0771264293
# END