From PYTHIA to DSPACK

Introduction and outlook
Creating a new tape
Copying the input file on a tape
Preparing the environment
Python script configuration
Running the script
Retriving the processed data
 

Introduction and outlook

We will describe how to simulate the interactions of the particules you have generated into the D0 detector.
We will run mc_runjob on the ccali computing facility. Here is what you have to do :
 

• create a tape on which you will copy your DSPACK file
• configure the python script
• run d0gstar then d0sim
• retrive your simulated data

 

Logon ccali
If you need to create a new tape :

D0 users are assigned the WVxxxx serie
Check that the file doesn't already exist : tms q vid WVxxxx
Create a tape wil the graphic control panel :

xtms
TapeMovement
Create/Issue
1st VID : WVxxxx (first K7 you want to create)
last VID : WVyyyy (same as 1st K7 if you create only one tape)
Labeltype : SL
Model-density : 3490
Execute

It will take at least 1/2 hour to get your tape ready
You can check the evolution with the command tms q vid WVxxxx

Copying the input file on a tape

We were unsucessful to run mc_runjob on a disk file. the only easy way is to write the input file on a tape. Then mc_runjob will work fine !

Once the tape is ready, copy your generated DSPACK file :

xtagewrite -V WVxxxx -q fseq dspackFile

WVxxxx is the tape visual identifier you have created
fseq is the file sequence : 1 for the first file you write, 2 for the second file, etc....
dspackFile is the file name of your DSPACK file

Please keep track of all the information written on your tape.
In particular, the file sequence fseq and the name of the DSPACK file.
If you don't do so, you will not be able to access your data and write additional data later on.
 

Preparing the environment

Go to your prefered working disk and import the necessary tools :

cd my_scratch
tar zxvf $THRONG_DIR/info_data/pmc03/mc_runjob.tar.gz
setup D0RunII pmc03.00.01
setup d0cvs
source setup_mcrunjob.csh (if your shell is csh ou tcsh, otherwhise source setup_mcrunjob.sh)
cd mc_runjob
cd py_scripts
cp ./scripts/Zee-d0gstar-d0sim.macro .
edit ./scripts/Zee-d0gstar-d0sim.macro .

Copying your ascii file on d0mino

Logon on d0mino and transfer your file.
The executable code will read your ascii file via a link named input and create a dspack MCevents.dat file.
Create a link to your ascii file :

cd p05dir
ln -sf your_ascii_file input

Run the executable

Run the executable interactively or in batch depending on the number of events you are simulating :

./bin/IRIX6-KCC_3_4/MCsusygen.x -rcp runMCsusygen.rcp

MC++ output RPC files are :

• MCevent.dump : output control file
• MCevents.dat : DSPACK format readable by d0gstar and Analyze.