Software

Getting the analysis software

Minimal CLAS software for EG1 analysis

download files from the JLAB CVS repository using the command

type the command below in order to tell CVS to use ssh

setenv CVS_RSH ssh

if you have an account on the JLAB computers you can do

cvs -td :ext:USERNAME@cvs.jlab.org:/group/clas/clas_cvs co packages/fpack

where USERNAME is your JLab username

The above will download packages from JLAB's CVS repository

I only needed the following subdirectories under the "packages" subdirectory to compile the EG1 reader code.

cvs -td :ext:USERNAME@cvs.jlab.org:/group/clas/clas_cvs co packages/fpack
cvs -td :ext:USERNAME@cvs.jlab.org:/group/clas/clas_cvs co packages/cms
cvs -td :ext:USERNAME@cvs.jlab.org:/group/clas/clas_cvs co packages/Makefile

unless the environmental variable OS_NAME is set the Makefile will default to Linux. If you get the error

cc1: error: unrecognized command line option "-fwritable-strings"

then you need to remove this depreceated switch from the file

flags.Linux.mk

near line 45 in the above file change

CFLAGS += $(CLEVEL) -fwritable-strings 

to

CFLAGS += $(CLEVEL) 

Tell the makefile where to look for the Makefile scripts

setenv CLAS_CMS /home/tforest/src/CLAS/packages/cms

Tell the dst make file where to put the libraries it is going to built

setenv TOP_DIR /home/tforest/src/CLAS/lib

the files under bosbank depend on ROOT so you need to install ROOT.

EG1 DST reader

The EG1 dsts reader is used to uncompress the EG1 DST data files for analysis. The DST library has at least 3 version now so you must use the correct DST library with your data file.

UNIX software

apt-get install paw apt-get install paw++ apt-get install xemacs

Contents of EG1 DST files

Name	BOS bank	Description
p_id	EVNT.ID	Particle ID 1= electron ...
		1= electron
		2= proton
		3= neutron
		4= [math]\pi^+[/math]
		5= [math]\pi^-[/math]
		6= [math]K^+[/math]
		7= [math]K^-[/math]
		8= deuteron
		9= Helium 3
		10= Helium 4
		11= photon
		12= positron
p_x	EVNT.P*EVNT.dir_cos[o]	Momentum in X direction
p_y	EVNT.P*EVNT.dir_cos[1]	Momentum in Y direction
p_z	EVNT.P*EVNT.dir_cos[2]	Momentum along beam pipe
v_x	EVNT.vertex[0]	position of vertex in X
v_y	EVNT.vertex[1]	in Y
v_z	EVNT.vertex[2]	in Z
q	EVNT.Charge	Particle's Charge
beta	EVNT.Beta	Beta particle
sector	DCPB.SCTR or ECPB.ScHT or LCPB.ScHT or SCPB.ScPdHT	sector
chi_sqr	DCPB.Chi2	track goodness of fit
cc_pe	CCPB.Nphe/10	number of photoelectrons in Cerenkov detector
cc_chi_sqr	CCPB.Chi2CC	geometrical matching angle between CC hit and nearest SC hit(in rad)
trl1_theta	TRL1.DC1	angle on tracking layer one
trl1_phi	TRL1.DC1	angle
trl1_x	TRL1.DC1_pos[0]	position at first DC layer in X
trl1_y	TRL1.DC1_pos[1]	position at first DC layer in Y
trl1_z	TRL1.DC1_pos[2]	position at first DC layer in Z
sc_e	SCPB.Edep	energy deposited in the scintillator
ec_in	ECPB.Ein	energy deposited into inner part of electron calorimeter
ec_out	ECPB.Eout	into outer part of electron calorimeter
ec_tot	ECPB.Etot	total energy deposited into calorimeter
ec_pos_x	ECPB.Position[0]	the position in electron calorimeter in X
ec_pos_y	ECPB.Position[1]	the position in electron calorimeter in Y
ec_pos_z	ECPB.Position[2]	the position in electron calorimeter in Z
ec_m2hit	ECPB.M2_hit	second moment hit pattern in the calorimeter
sc_paddle	SCPB.ScPdHt	SC paddle number
tdc_time	SCPB.Time	flight time
track_length	SCPB.Path	track length
flag	based on EVNT.Status and TRL1.hits	If value is > 10 then 6 superlayer were used in track fit
sc_x	DCPB.SCplane[0]	intersection with SC plane in X
sc_y	DCPB.SCplane[1]	intersection with SC plane in Y
sc_z	DCPB.SCplane[2]	intersection with SC plane in Z
sc_cx	DCPB.SCdir_cos[0]	direction cosine in X at SC plane
sc_cy	DCPB.SCdir_cos[1]	direction cosine in Y at SC plane
sc_cz	DCPB.SCdir_cos[2]	direction in Z

FAQ

fwriteable-strings error

cclose.c -o /home/didbtama/src/CLAS/obj/Linux/fpack/cclose.o
cc1: error: unrecognized command line option "-fwritable-strings" 

To get rid of this error we copied flags.LinuxRH.mk to flags.Ubuntu.mk and changed line

     CFLAGS += $(CLEVEL) -mcpu=pentium -fwritable-strings

to be

CFLAGS += $(CLEVEL) -mcpu=pentium

we also needed to copy the file
link.LinuxRH.mk to link.Ubuntu.mk