DMC_grat_scan_nochop
At each grating position, data is taken with chopper at position P#11 (P#5 ramps), and then on BB1 and BB2 (P#9 ramps at positions P#7 and P#8)
DMC sequence pseudo code:
WAIT 1 ; have a defined start
LABEL 0 ; set Label to 0
LOOP P#1 ; main loop measurement
LOOP P#2 ; grating loop up
WAIT 1 ; sync. for grating
MOVE_GRATING_RELATIVE P#3 ; increment grating position
LABEL 3 ; first chopper pos.
WAIT P#5 ; take P#5 ramps
LOOP P#6 ; calibration loop
WAIT 1 ; sync. for chopper
MOVE_CHOPPER_ABSOLUTE P#7 ; chop to BB1
LABEL 65 ; BB1
WAIT P#9 ; take P#9 ramps
WAIT 1 ; sync. for chopper
MOVE_CHOPPER_ABSOLUTE P#8 ; chop to BB2
LABEL 129 ; BB2
WAIT P#9 ; take P#9 ramps
END_LOOP ; calibration done
MOVE_CHOPPER_ABSOLUTE P#11 ; chopper to default
END_LOOP ; grating scan up done
LOOP P#10 ; grating loop down
WAIT 1 ; sync. for grating
MOVE_GRATING_RELATIVE P#4 ; decrement grating position
LABEL 19 ; first chopper pos.
WAIT P#5 ; take P#5 ramps
LOOP P#6 ; calibration loop
WAIT 1 ; sync. for chopper
MOVE_CHOPPER_ABSOLUTE P#7 ; chop to BB1
LABEL 81 ; BB1
WAIT P#9 ; take P#9 ramps
WAIT 1 ; sync. for chopper
MOVE_CHOPPER_ABSOLUTE P#8 ; chop to BB2
LABEL 145 ; BB2
WAIT P#9 ; take P#9 ramps
END_LOOP ; calibration done
MOVE_CHOPPER_ABSOLUTE P#11 ; chopper to default
END_LOOP ; grating scan down done
END_LOOP ; main loop done
WAIT 1 ; complete last plateau
LABEL 0 ; reset LABEL to 0Input variabke(s):
int[] procedure DMC_grat_scan_nochop {
int nb_up_dn = 1; // Seq P#1 Nb of sequences: up down up ...
int nb_grat_steps_up = 10; // Seq P#2 Nb of grating up steps
int nb_ramps_grat_pos = 2; // Seq P#5 Nb of ramps per grating position
int nb_CS1_CS2 = 0; // Seq P#6 Nb of cycles on CS, per grat position
int nb_ramps_cs = 2; // Seq P#9 Nb of ramps per plateau on the CS
int nb_grat_steps_dn = 10; // Seq P#10 Nb of grating down steps
}{The only role of PACS' DMC scripts is the computation of the duration of DEC/MEC sequences, needed as input variable when starting the associated OBCP.