Archives of Detector with Lepton, Photon and Hadron Identification, DELPHI

Identity Statement [Top]

Reference code(s)



Archives of Detector with Lepton, Photon and Hadron Identification, DELPHI



Level of description


Extent of the unit of description

81 boxes, 134 items, 8 linear meters

Context [Top]

Name of creator

DELPHI (Detector with Lepton, Photon and Hadron Identification) Collaboration

Administrative history

DELPHI was one of the four major detectors (with ALPEH, L3 and OPAL) used in the LEP (Large Electron and Positron collider) experiments, approved in November 1982. The construction of DELPHI began in 1983 and was completed in 1988; ready for the start-up of LEP in August 1989 550 physicists from 22 countries were involved in this collaboration.

DELPHI's weight was about 3500 tons (including a supraconductor magnet of 82 tons). DELPHI was not a single detector but a combination of trackers, calorimeters (such as the High-density Projection Chamber), scintillator counters, luminosity detectors, muon chambers and hadron identificators based on the "Ring Imaging Cherenkov" (RICH) technique; the high precision of the Microvertex (important for the detection of Quark B) is also noteworthy.

DELPHI was located at PIT 8, one hundred metres below ground level. The dismantling of DELPHI began in November 2000 and was completed in September 2001. As a whole, LEP confirmed the Standard Model theory and gave clear indications on how to search for the Higgs boson.

The first spokesperson of DELPHI was Ugo Amaldi (1981-1994), then Jean-Eudes Augustin (1995-1996), Daniel Treille (1997-1998), Walter (Wilbur) Venus (1998-1999), Tiziano Camporesi (2000-2001) and Jan Timmermans (2002- ).

Archival history

The first box of the collection (V0501) which will be referenced CERN-ARCH-DELPHI-01-... has not been yet received (10th of June 2002).

Immediate source of acquisition or transfer

Received from Ugo Amaldi in summer 2001.

Content & Structure [Top]

Scope and content

The items in this collection were created or received by Ugo Amaldi, spokesperson of DELPHI experiment from 1981 to 1994. They essentially consist of correspondance, projects and discusions regarding the future DELPHI detectors and proceedings of conferences (DELPHI Weeks, DELPHI Forum, ...). This collection gives an overview on how a large scientific and technical project was conducted.

Appraisal, destruction and scheduling information

Nothing was destroyed.


No further accruals are expected.

System of arrangement

The original order was preserved.

  • CERN-ARCH-DELPHI-02-* LEP Logbooks
  • CERN-ARCH-DELPHI-03-* DELPHI Recommendations, Memoranda, correspondence, letters of intent, miscellaneous
  • CERN-ARCH-DELPHI-04-* DELPHI Bulletins and list of Who is Who
  • CERN-ARCH-DELPHI-05-* Back-up papers, DELPHI collaboration Board (CB), DELPHI Executive Committee (DEC), DELPHI Collaborations : JINR, Serpukhov groups, Czekoslovakia, Brazil, Lubljana
  • CERN-ARCH-DELPHI-06-* DELPHI LEP200 Physics, DELPHI Forum, DELPHI Week General meetings
  • CERN-ARCH-DELPHI-07-* Test beam correspondence, DELPHI Notes, Solenoid at Rutherford Appleton Laboratory (RAL), Data Acquision (DAQ), Time Projection Chamber (TPC), Hadron Calometer, Forward RICH (FRICH), RICH barrel and counters, BRICH papers, High-Density Projection Chamber (HPC), Microvertex

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, a small part is in French, Italian, German or Russian.

Finding aids

Listed to file level in the CERN Archives Database.

Description control [Top]

Archivist's note

Description prepared by Marc Reymond.

Date(s) of description

Geneva, December 2001 and January 2002, Revised 2007.