CERN is European Organization for Nuclear Research and it is located near the Geneva, Switzerland. I've been participating in two neutrino experiments from 1995 till 1999: NOMAD and NOMAD-STAR.

13 institution, over 20 people, 8 countries.

OSF/1 DEC/alpha workstations, SunOS, Solaris, PC/Linux RedHat 4.2 & Slackware 3.2.

2 working langugages (English & French).

Duration of experiment: ~2 years, ~14 monthes data taking (day/night shifts), data analyses 2 years.

SYSTEM ADMINISTRATION

Installation, support and deployment of NOMAD-STAR software. Transfering, troubleshooting, debugging of NOMAD/NOMAD-STAR software on OSF/1 main cluster and RedHat farm. Client support for Linux machines (environment, library support, graphics, software management).

Web-support: An automatic update of internal NOMAD-STAR Web-site was performed during a full period of time. Update of data samples, software and access to internal data base were established.

Data management: During a whole year data were transfered between DLT robot storage farm to a local cluster. Approximately 20 Gb/day were analysed, sorted and transfered (see example of source code).

Software support: Automatic update of NOMAD-STAR software on RedHat Linux client boxes. Development and support of NOMAD-STAR software. As an example below you can see one of the modules of installation package for NOMAD-STAR experiment which was written in Tcl/Tk:

The code can be found here.

As of leader of off-line software development group of NOMAD-STAR experiment I was responsible for data digitization, hit, track and vertex reconstruction. I was developing all individual parts of the off-line software. Among them:

design and implementation of track reconstruction algorithm;

data decoding and hit digitization;

track reconstruction and extrapolation;

developing of 2D Kalman filter for NOMAD-STAR;

track matching between DC and STAR;

vertex reconstruction;

event display for NOMAD-STAR;

data visualization and analysis.

The code was developed and tested under Unix operation system using C language and gcc/gdb tools, shell scripting (sh, Tcl/Tk, awk/sed). Event display was based on OnX/Motif interface and Ci interpreter (LAL software).

On-line software was developed for direct digitization of incoming signal from detector in readable format and on-line data analysis. The stand alone event display was also provided. My contribution included:

data decoding;

setup on-line event display using direct stream of data from working sub-detectors;

data analysis.

I was responsible for transfer, analyse, triggering and backup of NOMAD-STAR data. My responsibilities included:

automatic data transfer from central CERN storage facility (DLT robot tapes) through LAN network;

data triggering (only 0.5-1% of incoming data where usefull during a run). Out of 1,000,000 triggers only 10,000 real events where recordered and analysed;

pedestals and noise calculation were established automatically and written to another tapes;

data access for local users was performed.

13 institutions, over 100 people, over 10 countries.

OSF/1 DEC/alpha, SunOS, Solaris workstations, PC/Linux RedHat 4.2 & Slackware 3.2.

Duration of experiment: ~5 years, ~4 years data taking (day/night shifts).

I was responsible for track reconstruction. I was developing some individual parts of the off-line software. Among them:

track reconstruction in NOMAD-STAR detector;

track matching and extrapolation among Drift Chambers and STAR detectors;

developing of 2D Kalman filter for NOMAD-STAR sub-detecotr;

vertex reconstruction in NOMAD-STAR sub-detector;

event display for NOMAD-STAR sub-detector;

data visualization and analysis.

The code was developed and tested under Unix operation system using C language, shell scripting (sh, Tcl/Tk, awk/sed). Event display was created using OnX/Motif interface and Ci interpreter (LAL software). I also performed a MC simulation of passive (Pb) target for neutrino trident production.