Tevatron

The Tevatron is a circular particle accelerator in the United States, at the Fermi National Accelerator Laboratory (also known as Fermilab), just east of Batavia, Illinois. 

 

The 6.86 km circumference ring contains two detectors: CDF for Collider Detector at Fermilab and DZero. In 1995 CDF and DZero experiments announced discovery of the top quark.

 

The Tevatron ceased operations on 30 September 2011, due to budget cuts and because of the completion of the LHC, which began operations in early 2010 and was more powerful.

Detectors
Lab

Tevatron Status

Bit Preservation

All data migrated to T10k technology (2 ½ years).

Data integrity checks: After each copy during migration; Periodic reads from each tape.

Long term future preservation of CDF data at INFN-CNAF, developed in collaboration with CDF and FNAL SCD.

Data

Two copies of raw data at FNAL, in different locations. In case of damage/loss analysis ntuples can be reproduced and/or eventually recovered from CNAF.

Documentation

All online webpages and code archived, still accessible from CDF webpages.

Software

All online webpages and code archived, still accessible from CDF webpages.

At the time of Tevatron shutdown

  • all code in frozen releases or in CVS repositories
  • based on 32-bit frameworks built on Scientific Linux 5 (but with compatibility libraries to older OSs)

Long term future solution: build legacy release that contains no pre-SL6 libraries

CVMFS for code distribution

Use Cases

Continued analyses by former collaboration members

Audience

Primarily former collaboration

Value

Quantitative measures (# papers, PhDs etc) exist

Uniqueness

Unique initial state vs LHC; Multiple energy collisions (300, 900 and 1960 GeV)

Resources

FNAL R2DP project budgeted 4 (3) FTE in 2013, 3 (2.1) in 2014 and 0.3 (0.4) in 2015. (Expenditure)

Status

R2DP project complete

Issues

Both CDF and D0 use Oracle → licence cost is a long-term future challenge. Migration to open source db would require considerable human effort (need to rewrite the analysis software)

Outlook

Goal: Complete analysis capability (DPHEP “level 4”) through Nov 2020 (SL6 EOL) and beyond.