QCPMG pulse program for topSpin2.1 operating system




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Carr-Purcell-Meiboom-Gill echo train

Code for Avance III spectrometers with topSpin2.1 operating system

; qcpmg (TopSpin 2.0)
; AVANCE III
; FAU, 09/05/2007
; written by Stefan Steuernagel
; use rotor-synchronized CPMG train of refocusing pulses to create the echoes

; pulse program for quadrupolar CPMG sequence
; samples continuously, including ALL pulses and ringdown delays
; may be used with digmod digital
; important: only runs via SGU in channel 1

;parameters:
;ns : 16 * n
;d1 : recycle delay
;d3 : time to allow pulse ringdown, 10 to 100 us
;d6 : enter duration of FID
;pl1 : =120 dB, not used
;pl21 : RF power level
;pl22 : =pl21 usually, =120 dB if 180° pulses are not desired
;p3 : 90 degree pulse
;p4 : 180 degree pulse
;p25 : dummy pulse, not used for acq.
;l22 : # of echos to be acquired
;cnst1 : set td to number of acquired complex data points
;$COMMENT=quadrupolar CPMG sequence, samples continuously, pulses blanked out, requires DRU
;$CLASS=Solids
;$DIM=1D
;$TYPE=half integer quadrupoles
;$SUBTYPE=simple 1D
;$OWNER=fabien
#include <Avancesolids.incl>
; "p4=p3*2"
"cnst1=((d6*2+d3*2+p4)*l22+d6+d3)/dw"
define delay rest
"rest=aq-(cnst1*dw)"
"p25=1/cnst1"
;cnst11 : to adjust t=0 for acquisition, if digmod = baseopt
"acqt0=1u*cnst11"

1 ze
2 d1
  STARTADC
  RESETPHASE
  (p3 pl21 ph1):f1
  d3
  (p4 ph2):f1
  d3 DWL_CLK_ON
3 d6 RG_ON
  0.1u RG_OFF
  d3
  (p4 pl22 ph3):f1
  d3
  d6 RG_ON
  lo to 3 times l22
  d6
  d3
  rest RG_OFF
  0.1u DWL_CLK_OFF
  rcyc=2
  10m wr #0
exit

ph0=0
ph1=0 2
ph2=1 1 3 3
ph3=1 1 1 1 3 3 3 3
ph30=0
ph31=2 0
;ph0=0
;ph1=0 1 2 3
;ph2=1 0 1 0 3 2 3 2 1 0 1 0 3 2 3 2
;ph3=1 0 1 0 3 2 3 2 3 2 3 2 1 0 1 0
;ph30=0
;ph31=2 3 0 1
Carr-Purcell-Meiboom-Gill echo train

Graphic representation associated with the TopSpin2.1 qcpmg.fau pulse program.


Silicon-29 echo train in tsp-d4 acquired with qcpmg pulse program

29Si echo train of TSP-d4 in 4 mm diameter rotor spinning at 10 kHz.


Acquisition parameters:

General  
PULPROG qcpmg.fau
TD 9252
NS 1920
DS 0
SWH [Hz] 20000.00
AQ [s] 0.2313500
RG 114
DW [µs] 25.000
DE [µs] 6.50
const1 9251.456055
CONST11 0.0000000
D1 [s] 30.00000000
D3 [s] 0.00005000
D6 [s] 0.01000000
L22 11
P25 [µs] 0.00
rest [s] 0.00006360
Channel f1  
NUC1 29Si
P3 [µs] 3.00
P4 [µs] 12.40
PL1 [dB] 120
PL1W [W] 0.00000000
PL21 [dB] 6.00
PL21W [W] 130.48197937
PL22 [dB] 6.00
PL22W [W] 130.48197937
SFO1 [MHz] 99.3774009
Silicon-29 echo train in tsp-d4 spinning at 20 kHz with 2.5 mm diameter rotor

29Si echo train of TSP-d4 in 2.5 mm diameter rotor spinning at 20 kHz.


Acquisition parameters:

General  
PULPROG qcpmg.fau
TD 9252
NS 360
DS 0
SWH [Hz] 20000.00
AQ [s] 0.2313500
RG 512
DW [µs] 25.000
DE [µs] 6.50
const1 9250.399414
CONST11 0.0000000
D1 [s] 180.00000000
D3 [s] 0.00005000
D6 [s] 0.01000000
L22 11
P25 [µs] 0.00
rest [s] 0.00009002
Channel f1  
NUC1 29Si
P3 [µs] 5.00
P4 [µs] 10.00
PL1 [dB] 120
PL1W [W] 0.00000000
PL21 [dB] 8.00
PL21W [W] 82.32855988
PL22 [dB] 8.00
PL22W [W] 82.32855988
SFO1 [MHz] 99.3782330
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