# Bi-cog180(134,144,135,45).in

# spin-9/2 anti echo and echo amplitude optimization
# versus the first-pulse duration
# in three-pulse amplitude-modulated z-filter 9QMAS,
# the second-pulse duration p2 = 4 micro seconds
# the third-pulse duration p3 = 2 micro seconds

spinsys {
  channels 209Bi
  nuclei   209Bi
  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       180 
  variable wA      134
  variable wB      144
  variable wC      135
  variable wRec    45
}

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 209Bi: "
  puts [resfreq 209Bi $par(proton_frequency)]
}

#SIMP
#NP=17
#SW=4000000
#TYPE=FID
#DATA
#0 0
#-1.78257409e-12 -1.60715885e-12
#-1.63513647e-12 -6.62803146e-13
#-1.12931886e-10 1.42108547e-13
#-1.26337198e-08 6.44018172e-12
#-4.55798412e-07 2.28002062e-10
#-7.86768952e-06 4.1532644e-09
#-8.07532868e-05 4.40657209e-08
#-0.00056166691 3.11651946e-07
#-0.002882385 1.60796979e-06
#-0.0115744747 6.44676054e-06
#-0.0379492429 2.10445135e-05
#-0.104896641 5.79790133e-05
#-0.250604204 0.000138671256
#-0.527873584 0.000294405543
#-0.996485445 0.000564594762
#-1.7089826 0.000991508531
#END