The OPAL Discussion Forum

["Duffy, Leanne D" <ldd AT lanl.gov>]

I am using OPAL v1.1.9 and trying to run a distribution consisting of several 
overlapping Gaussians.  Section 11.8 of the manual indicates this should be 
possible by replacing DISTRIBUTION = DIST1 with something like DISTRIBUTION = 
{DIST1, DIST2, DIST3} under the RUN command.  When I tried using this, I got 
the following error message:

OPAL {+0}> *** Parse error detected by function "Expressions::parseString()"
OPAL {+0}> *** in line 1047 of file "laserrip.in" before token "{":
OPAL {+0}>     
RUN,METHOD="PARALLEL-T",BEAM=BEAM_PARTICLES,FIELDSOLVER=FS_SC,DISTRIBUTION={DIST1,DIST2,DIST3,DIST4,DIST5,DIST6,DIST7,DIST8,DIST9,DIST10,DIST11,DIST12,DIST13,DIST14};
OPAL {+0}>     String value expected.
OPAL {+0}> 
OPAL {+0}> * 
**********************************************************************************
 
OPAL {+0}>   Selected Tracking Method == PARALLEL-T, NEW TRACK
OPAL {+0}> * 
**********************************************************************************
 
OPAL {+0}> ********************** DISTRIBUTION **********************
OPAL {+0}> 
OPAL {+0}> Number of particles: 10000000
OPAL {+0}> 
OPAL {+0}> Distribution type: GAUSS
OPAL {+0}> 
OPAL {+0}> SIGMAX   = 0 [m]
OPAL {+0}> SIGMAY   = 0 [m]
OPAL {+0}> SIGMAZ   = 0 [m]
OPAL {+0}> SIGMAPX  = 0 [Beta Gamma]
OPAL {+0}> SIGMAPY  = 0 [Beta Gamma]
OPAL {+0}> SIGMAPZ  = 0 [Beta Gamma]
OPAL {+0}> CORRX    = 0
OPAL {+0}> CORRY    = 0
OPAL {+0}> CORRZ    = 0
OPAL {+0}> R61      = 0
OPAL {+0}> R62      = 0
OPAL {+0}> R51      = 0
OPAL {+0}> R52      = 0
OPAL {+0}> CUTOFFX  = 0 [units of SIGMAX]
OPAL {+0}> CUTOFFY  = 0 [units of SIGMAY]
OPAL {+0}> CUTOFFZ  = 3 [units of SIGMAZ]
OPAL {+0}> CUTOFFPX = 0 [units of SIGMAPX]
OPAL {+0}> CUTOFFPY = 0 [units of SIGMAPY]
OPAL {+0}> CUTOFFPZ = 0 [units of SIGMAPY]
OPAL {+0}> 
OPAL {+0}> Distribution is injected.
OPAL {+0}> 
OPAL {+0}> **********************************************************

The only change I have made is replacing a distribution with the list of 
distributions.  Is this actually implemented?  If so, is it implement
in versions later than 1.1.9?  Have I misinterpreted how to use this function?

Thanks,
Leanne

--------------------------------
Leanne Duffy
AOT-HPE, Los Alamos National Laboratory
ldd AT lanl.gov