How to run UrQMD 

Code is in (/disks/scsi_2/public/gcc-296/urqmd/). There are tree versions v1.2, v1.3 and v1.3p 

Go to the last version /disks/scsi_2/public/gcc-296/urqmd/v1.3/src/urqmd-1.3p1 

There is an executable "urqmd.Linux" for UrQMD 

The program convert-urqmd_1.3.6 is a C-program that converts the syntax of the URQMD output file to GEANT input syntax.

Go to directory “/disks/scsi_2/public/gcc-296/urqmd/v1.3/run”, you will find the file callscript_urqmd-1.3.sh, this file will call the myscript. This file has various environment variables that can be set, in order to determine the kind of output that UrQMD creates.

The output file that was used up to now is number 14 !

This output is activated by setting the environment variable:

export ftn14=__filename__

There is a configuration file necessary to tell urqmd what to calculate. It is passed via the environment variable ftn09

The file myscript has also the input file (“/disks/scsi_2/public/gcc-296/urqmd/v1.3/ini/c2c.input”)

An example for the input file of the central 12C+12C collisions at 2xA GeV  is:

**********************************

pro 12 6 --> projectile ( this case is Carbon )

tar 12 6 ---> target ( this case is Carbon)

nev 100000 ---> number of events

tim 100 100 ---> time of calculation in fm/c

rsd 123456 ---> seed for random number generator

ene 2.0 ----> energy of the projectile in GeV

imp -10. ----> impact parameter

eos 0 ---> equation of state

f13 ---> output to unit 13

f15 ---> output to unit 15

f16 ---> output to unit 16

f19 ---> output to unit 19

f20 ---> output to unit 20

xxx ----> last line of input file 

*************************************************

Converter - UrQMD

The program “/disks/scsi_2/public/gcc-296/urqmd/v1.3/src/converter/1.3.6/convert-urqmd_1.3.6” is a C-program that converts the syntax of the URQMD output file to GEANT input syntax.

How to run urqmd and the converter in a script:

1) npmaster@user> ./create_name.sh  [file name] [min number] [max number]

for exp:

npmaster@user> ./create_name.sh c2c.v1.3.f14 1 100

it will generate the following files c2c.v1.3.f14.1, c2c.v1.3.f14.2,.......,c2c.v1.3.f14.100.

Then you need to run this file as the following:

2) npmaster@user> at -f SendConvertBatch_a.sh now

The last step is to convert the syntax of the UrQMD output file to GEANT input syntax. Just type the following:

3) npmaster@user> ./transform.sh c2c.v1.3.f14 1 2

Figure 1 shows the accepted phase-space distributions of protons and pions in the transverse momentum versus rapidity plane for central 12C+12C collisions at 2xA GeV given by UrQMD. A particle is accepted if it fulfills the conditions: ( , Pz >0, p>50)   

Figure 1: Phase-space distributions of protons and pions in the transverse momentum versus rapidity plane for central 12C+12C collisions at 2´A GeV given by UrQMD. A particle is accepted if it fulfill the conditions ( , Pz >0, p>50)