# Al-cog60(28,34,45,15).in


# spin-5/2 anti echo and echo amplitude optimization
# versus the first-pulse duration
# in three-pulse amplitude-modulated z-filter 5QMAS,
# 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     rep10
  gamma_angles     10
  proton_frequency 800e6
  start_operator   I1z
  detect_operator  I1c
  verbose          1101
  variable rf      90000
  variable rf3     9300
  variable p2      4 
  variable p3      2 
  variable N       60 
  variable wA      28
  variable wB      34
  variable wC      45
  variable wRec    15 
}

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

  acq -x
  for {set i 1} {$i < $par(np)} {incr i} {
    pulse $par(tsw) $par(rf)  $par(phA) 
    store 2
    pulse $par(p2)  $par(rf)  $par(phB) 
    pulse $par(p3)  $par(rf3) $par(phC) 
    acq                 [expr $par(phREC) - 90] 
    reset
    prop 2
  }
}

proc main {} {
  global par

  for {set j 0} {$j < $par(N)} {incr j} {

    set par(phA)   [expr $j*$par(wA)*360./$par(N)]
    set par(phB)   [expr $j*$par(wB)*360./$par(N)]
    set par(phC)   [expr $j*$par(wC)*360./$par(N)]
    set par(phREC) [expr $j*$par(wRec)*360./$par(N)]

    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
#-1.27798327e-09 8.87706575e-13
#-5.85462641e-07 3.71901801e-10
#-1.87286308e-05 1.18961894e-08
#-0.000195623463 1.24683066e-07
#-0.00108799177 7.12467933e-07
#-0.00401184576 2.82823819e-06
#-0.0110311005 8.91894586e-06
#-0.0243512199 2.41042303e-05
#-0.0456156664 5.79859363e-05
#-0.0759948132 0.0001257905
#-0.117095148 0.000246377504
#-0.171518671 0.000435738582
#-0.241950004 0.000698431021
#-0.328952337 0.00102209844
#-0.428917153 0.00137866014
#-0.533652236 0.00173146942
#END