Archives of the UA2 Collaboration, Underground Area 2

Identity Statement [Top]

Reference code(s)



Archives of the UA2 Collaboration, Underground Area 2


From 1978 to 1992.

Level of description


Extent of the unit of description

128 boxes; 15 linear meters; 323 items

Context [Top]

Name of creator

CERN (Geneva, Switzerland), UA2 Collaboration.

Administrative history

The UA2 Collaboration has many things in common with the UA1 Collaboration. These two collaborations made their experiments at CERN, using the SPS accelerator, and both were chasing the same goal (discovery of W and Z bosons). The major difference (from a physics point of view) is the detectors they used, which were very different. The UA2 detector was optimised for electron detection and had no central magnet. Toroïdal magnetic spectrometers in the forward and backward regions served to detect electrons and measure their energy.

Between 1985 and 1987, the UA2 detector was upgraded (extending of the calorimeter coverage, and rebuilding the central detector).

The UA2 experiment ended in 1990.

The UA2 Collaboration comprised groups from Bern, Cambridge, CERN, Dortmund, Heidelberg, Melbourne, Milano, Orsay (LAL), Pavia, Perugia, Pisa, Saclay (CEN).

The spokesmen of the UA2 Collaboration were Pierre Darriulat (1978-1985) and Luigi Di Lella (1986-1992). The leader of CERN UA2 group was Peter Jenni.

Immediate source of acquisition or transfer

Peter Jenni (CERN - Particle Physics Experiments Division), 17 March 1994.

Content & Structure [Top]

Scope and content

This collection contains reports, correspondence and official documents related to UA2 Collaboration. It gives an overview of a large and international scientific collaboration.

Appraisal, destruction and scheduling information

Nothing was destroyed.


No further accruals are expected.

System of arrangement

Administration and General CERN-ARCH-UA2-01-01-001 to 01-05-005
Notes CERN-ARCH-UA2-02-01 to 02-17
Technical drawings CERN-ARCH-UA2-03-01-001 to 03-02-007
UA2 minutes and documents CERN-ARCH-UA2-04-01-001 to 04-06-004
Upgrading UA2 CERN-ARCH-UA2-05-01-001 to 05-02-004
Calorimeter, upgraded CERN-ARCH-UA2-06-01
Physics analysis CERN-ARCH-UA2-07-01-001 to 07-03-012
Calibration CERN-ARCH-UA2-08-01-001 to 08-03-001
Test beams CERN-ARCH-UA2-09-01 to 09-11
Electronics Counting Room CERN-ARCH-UA2-10-01 to 10-14
Data Acquisition CERN-ARCH-UA2-11-01-001 to 11-05-003
Photomultipliers CERN-ARCH-UA2-12-01 to 12-02
Logbooks CERN-ARCH-UA2-13-01-001 to 13-16-002
Miscellaneous CERN-ARCH-UA2-14-01-001 to 14-02-001

Conditions of access and use [Top]

Conditions governing access

See file level description and the CERN operational circular No 3: rules applicable to archival material and archiving at CERN. In general, records on any subject that are over 30 years old, and all records of a purely scientific nature, may be consulted.

Conditions governing reproduction

Copyright is retained by CERN, no reproduction without permission.

Language / scripts of material

Most of the material is written in English.

Finding aids

Listed to file level in the CERN Archives Database.

Allied materials [Top]

Related units of description

The UA1 Collaboration collection contains documents concerning similar experiments, but with a different technology.


For a complete description of the experiments of UA1 and UA2 Collaborations, see : WATKINS, Peter Maitland: Story of the W and Z, 1986.

For a detailed description of UA2 experience, see Karl Jakobs: The Physics Results of the UA2 Experiment at the CERN pp Collider, 1994.

Description control [Top]

Archivist's note

Description of the collection prepared by Maryse Moskofian. ISAD(G) description by Marc Reymond.

Date(s) of description

Collection: Geneva, 2000. ISAD(G) description: Geneva, August 2002, Revised 2007.