The Large Hadron Collider (LHC) at CERN smashes protons together at close to the speed of light with seven times the energy of the most powerful accelerators built up to now.
CMS( Compact Muon Solenoid) is a particle detector that is designed to see a wide range of particles and phenomena produced in high-energy collisions in the LHC.
Some of the collision energy is turned into mass, creating new particles
which are observed in the CMS particle detector.
CMS data is analyzed by scientists around the world to build up a picture
of what happened at the heart of the collision and to search for new phenomena that will help to answer questions such as:
What is the Universe really made of and what forces act within it?
And what gives everything substance?
CMS at JINR.
The JINR Grid Sites T1_RU_JINR and T2_RU_JINR are integrated
into the global WLCG (http://wlcg-public.web.cern.ch/,
http://wlcg.web.cern.ch/) infrastructure, meet the requirements
for the center of the 1st level-Tier1 and the 2nd level-Tier2
CMS collaboration at the current stage of this experiment.
The Tier 1 site has 23360 cores (427920.04 HEP-SPEC06 performance; Average HEP-SPEC06 per Core= 8.32) and CMS can occupy all cores (2025Q2).
For data storage CMS uses an EOS and dCach systems :
- EOS 500TB ,
- dCache dsk Tier1: 14709.43TB,
- dCache Tier2: 2410.34TB.
In 2024, the Tier 1 site processed 1,888,913,532 tasks, representing 24% of the total CMS tasks processed at Tier 1 centers:
RU-JINR-T1 1,888,913,532 24%
US-FNAL-CMS 1,665,321,019 21%
UK-T1-RAL 1,132,299,978 14%
DE-KIT 1,097,134,332 13%
FR-CCIN2P3 807,778,212 10%
ES-PIC 671,291,604 8%
IT-INFN-CNAF 618,136,609 7%
The functionality of the VOBOX Grid Service for CMS is provided and
supported at JINR:
- The Phedex server is installed and periodically updated, which is necessary for transferring data between the CMS grid sites via the FTS grid service.
- Configure and use the proxy server SQUID, which is necessary when working with specialized CMS databases (conditions DB).
Certification of CMS T2-network CMS network connections with
all CMS-sites of the 1-st level with the required data transfer rate.
T2_RU_JINR, a mass launch of typical CMS tasks is performed using the HammerCloud test system:
http://hammercloud.cern.ch/hc/app/cms/
http://hammercloud.cern.ch/hc/app/cms/robot/historical/.