# al-split-t1-5Q-antiecho-160-phase-cycling-p3.in

# oQ -> 5Q -> 1Q -> -1Q
# approach: 160-phase cycling the first pulse, the third pulse and the receiver

# 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   I1z
  detect_operator  I1c
  verbose          1101
  variable rf      90000
  variable rf3     90000
  variable p1      15 
  variable p2      8.5
  variable N1      20
  variable N3      8
  variable deltap1 -5
  variable deltap3 2
}

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       [expr $par(ph31) - 90]

  }
}

proc main {} {
  global par

  for {set j1 0} {$j1 < $par(N1)} {incr j1} {
    set par(ph1)   [expr $j1*360./$par(N1)]
    for {set j3 0} {$j3 < $par(N3)} {incr j3} {
      set par(ph3)   [expr $j3*360./$par(N3)]
      set par(ph31)  [expr $par(deltap1)*$par(ph1) + $par(deltap3)*$par(ph3) ]

      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
# -0.692965606 3.88578059e-16
# -2.34556548 2.85882429e-15
# -3.89053292 2.94209102e-15
# -4.20563002 3.80251386e-15
# -2.7451136 2.58126853e-15
# 0.138834708 -1.19348975e-15
# 3.33004181 -3.63598041e-15
# 5.45813787 -3.49720253e-15
# 5.53989539 -3.21964677e-15
# 3.43589679 -7.77156117e-16
# -0.0770473195 3.10862447e-15
# -3.62496301 7.31359417e-15
# -5.83180366 1.09968458e-14
# -5.93622941 1.14075416e-14
# -4.0957177 1.11577414e-14
# -1.23166741 5.27355937e-15
# 1.42737478 2.24820162e-15
# 2.85514985 -5.55111512e-16
# 2.63415646 -7.21644966e-16
# 1.12346483 5.55111512e-17
# -0.740238303 3.58046925e-15
# -1.93509519 7.5078832e-15
# -1.86353595 7.70911113e-15
# -0.61864312 7.18175519e-15
# 1.11045613 4.18415302e-15
# 2.42905744 1.455433e-15
# 2.69338766 -8.13151629e-16
# 1.78420735 -3.99853761e-16
# 0.0992868159 1.86656246e-15
# -1.67324114 5.99520433e-15
# -2.88200196 6.00908212e-15
# -3.17902525 6.05071548e-15
# -2.60273985 2.72004641e-15
# END