# al-zfilter-amplitude-24-cycling-p1.in

# approach: 24-phase cycling the first pulse, the third pulse and the receiver

# spin-5/2 echo and antiecho amplitude optimization
# versus the first-pulse duration
# in three-pulse z-filtered amplitude-modulated 3Q-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 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   1.5*I1z
  detect_operator  I1c
  verbose          1101
  variable rf      90000
  variable rf3     93000
  variable p2      4 
  variable p3      2 
}

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

  acq $par(ph31)
  for {set i 1} {$i < $par(np)} {incr i} {
    pulse $par(tsw) $par(rf)  $par(ph1) 
    store 2
    pulse $par(p2)  $par(rf)  x
    pulse $par(p3)  $par(rf3) $par(ph3) 
    acq $par(ph31) 
    reset
    prop 2
  }
}

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  90    0}\
             { 60  90  180}\
             {120  90    0}\
             {180  90  180}\
             {240  90    0}\
             {300  90  180}\
             {  0 180   90}\
             { 60 180  270}\
             {120 180   90}\
             {180 180  270}\
             {240 180   90}\
             {300 180  270}\
             {  0 270  180}\
             { 60 270    0}\
             {120 270  180}\
             {180 270    0}\
             {240 270  180}\
             {300 270    0}} {
    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
# -0.000231828867 -1.74851081e-06
# -0.00790659113 -3.89445032e-05
# -0.0630718069 -0.000249978708
# -0.264657921 -0.000839157345
# -0.746840144 -0.00175890821
# -1.59441559 -0.00246174261
# -2.77535158 -0.00226968827
# -4.15992268 -0.00108807873
# -5.60280169 0.000497256428
# -7.01236802 0.00205844484
# -8.35133007 0.00403688503
# -9.59114851 0.00724334291
# -10.6863496 0.0117541441
# -11.5862246 0.0165576714
# -12.2537888 0.0202729518
# -12.664157 0.0222334276
# END