C. Joram

P. Catapano (CERN/Visits), E. Sanders (CERN, Microcosm), S. Ragazzi (Milano, HPC), F, Hahn (CERN/Gas), C. De Clercq (Brusels, MUF), Z. Kroumchtein (JINR), S. Nemecek (Prague), V. Canale (Rome, TRIG), J. Heuser (Wuppertal, VD), Ph. Gavillet (CERN), G. Valenti (CERN. TRIG), V. Hedberg (CERN, STIC), G. Jarlskog (LUND, VSAT), I. Lippi (Padova, FEMC), V. Obraztsov (Protvino, HCAL, HOF, STIC), V. Gracco (Genova, STIC), A. Augustinus (CERN, SC, DAS), F. Glege (Wuppertal, FCB), G. Leder (Vienna, FCA), W. Van Den Boeck (Brussels, MUF), H. Polka (Cracow, VD), P. Collins (CERN, VD), C. Berat (ISN, Grenoble), L. Tortora (Rome, HPC), B.S. Nielsen (NBI, RICH), T. Bellunato (CERN, RICH), Y. Arnoud (CERN, TPC), D. Bloch (IRES, RICH), M. Novak (Prague, TAG), M. Szczekowski (Warsaw), R. Gokieli (Warsaw, HPC), K. Österberg (Helsinki, VD), O. Ullaland (CERM, RICH), E. Albrecht (CERN, RICH), G. Lenzen (Wuppertal, RICH), B. Schwering (Wuppertal, FCB), M. Elsing (CERN), C. Weiser (CERN), C. Joram (CERN).

• The Dismantling Project Christian Joram
• Robcad Visualization of the Dismantling Emile Sabin (ET/LEA)
• Exhibition Projects Paola Catapano and Emma Sanders

• DELPHI Exhibition Packs Robert Sekulin
• Dismantling and "post mortem" life of

• RICHes Valerio Gracco
• HPC Stefano Ragazzi
• FEMC Ivano Lippi

The Dismantling of DELPHI (C. Joram)

The presentation gave an overview of the dismantling of DELPHI in the framework of the general LHC project planning. The available time of 8 months from October 2000 to end of May 2001, when the cavern has to be available for civil engineering work, leads to the following coarse schedule: Dismantling of the DELPHI detector (6 months); dismantling of the platform D3 and the counting barracks D2 and D1 (1 month); reserve (1 month). The dismantling will be complicated by the simultaneous dismantling of LEP (sharing of transport resources and pit access ways) and by the construction of the large building SHM8, which will occupy most of the car park in front of the SX hall. Storage space at the pit will be strictly limited to temporary usage. Only very limited indoor space will be available. A request for a large outdoor area close to the DELPHI site has been issued.

• DELPHI will provide:

• overall planing
• infrastructure (scaffolding, containers for scrap)
• team of crane drivers, mechanics and electricians.

• DELPHI takes care of:

• Cables and piping. Cables will normally be cut behind the connectors.
• Connectors stay on detector or on electronics modules.

• Electronics + material in counting houses: All electronics + material inside the barracks which is supposed to be recuperated has to be extracted from barracks during phase I (before 1 Nov 2000). Any remaining material is considered as scrap.
• Each detector group is responsible for the dismantling of their detector. The detector groups (the projects) have to support the DELPHI team by a sufficient number of hardware experts. The detector groups have to provide the necessary tools and special equipment.

Based on the installation times and on experience from shutdown work, a preliminary planning of the dismantling has been worked out by Jean Renaud. Feedback from the detector groups is now required, to further improve the time estimates. A detailed questionnaire, which has been filled and returned by almost all project leaders, indicates a general agreement on the proposed dismantling methods and time estimates. Alternatives are currently being developed to eliminate a mismatch between our time estimate of the HPC dismantling and the estimate by the HPC project.

As shown on the chart below, DELPHI will be dismantled in a sequence of 6 phases. Each phase corresponds to a specific configuration of barrel, endcaps and counting houses, which allows to work on barrel and endcaps simultaneously.

Another Technical Panel dealing with the DELPHI dismantling will be held during the DELPHI week in Cracow.

Microcosm and other museum projects (E. Sanders)

Emma Sanders, who is leader of the CERN Microcosm team, started with a short outline of the ideas behind this project. Microcosm shows mainly objects from the four fields, which are in close relation to the CERN activities: particles, accelerators, experiments and technology/industry. The visitors, which have an average age of 15-16 years, enjoy an exhibition comprising models, videos, computer games and original pieces of equipment. Although the available space and the budget are very limited, Microcosm is definitely interested in ‘smallish’ attractive components of the LEP detectors. Microcosm is a member of EXSITE, which is an European network of science, industry and technology centres, and is also in touch with other Swiss and French museums. These contacts may be used to receive possible requests from other museums and, in turn, to inform them about detector components available at CERN.

Possible Use of Detector Equipment for Visitor Centres in the Post-LEP Era

(P. Catapano)

Given the fact that the LEP facility is CERN’s main attraction for public visitors (around 30000 visitors/year, 20000 visitors on public days), the question arises, how to maintain this attractiveness in the post-LEP era. Since LHC experiments can not be available for public visits, the problem is not only a temporary one. Apart from visiting other experiments, e.g. the Antiproton De-accelerator, one of the ideas, which are currently discussed, is the creation of a LEP exhibition. It could include a section of the LEP accelerator and a complete LEP detector (possibly ALEPH). A number of possible environments for such a project are under consideration: Cité de l’Invisible in St. Genis, PRISM, LEP Exhibition at CERN - Natural extension to Microcosm, European Science Museums network, Musée d’Histoire des Sciences, Geneva. Currently CERN is in the process of fact finding and may give some guidelines by the end of the year.

Exhibition Packs (R. Sekulin)

Inspired by the impressive collection of detector components in front of the DELPHI control room, Robert Sekulin proposes so-called DELPHI Exhibition Packs. They would consist of modules of as many detectors as available or practicable. Ideally, several identical packs would be made, which should give a comprehensive overview of modern particle physics detector techniques. This would require that tracking, calorimetry, muon detection and particle identification be represented. The packs could be shipped to the participating institutes where they could be used for open days or local exhibitions. While the approach is comparably obvious for modular detectors, certain effort (money and manpower) would be required for monolithic detectors, possibly already during the DELPHI dismantling phase. The future of this idea will certainly depend on the interest it is able to stimulate inside the DELPHI collaboration.

Dismantling and "post mortem" life of the RICHes (V. Gracco)

The presentation discussed first the dismantling scenarios of the Barrel and Forward RICH. The Barrel can only be dismounted as a whole and will then be brought to hall 153 on the Meyrin site. The estimated 2 days for this operation seem realistic, however a careful preparation of the complex mounting and transport equipment is required. The Forward has to follow a different procedure: Only after all chambers and drift tubes have been removed, the empty vessels can be dismounted. Also here the allocated 5 days are considered as sufficient. There are plans to convert parts of both the Barrel and the Forward RICH to exhibition objects. A full RICH sector, comprising radiator, driftbox and mirrors, possibly animated by Laser or holographic methods appears extremely attractive.

Dismantling and "post mortem" life of the HPC (S. Ragazzi)

In the current DELPHI dismantling planning, there are 20 + 3 days allocated for the dismantling of the 126 + 18 HPC modules, where the major part of the modules is supposed to be extracted before the TPC and the Barrel RICH have been removed. This is in disagreement with the HPC project, which estimates 35 days, even if TPC/BRICH have been dismounted before, so that there is full access to the modules.

Prior to dismantling the modules have been brought back to the horizontal position by means of the special pneumatic system. A certain number of modules are expected to be stuck and will require significant effort to get them out. Since only a small number of modules will be used for exhibition purposes, the main part of the modules has to be scrapped. Each HPC modules is equipped with a ²⁴¹Am source which, of course, has to be removed before.

Dismantling and "post mortem" life of the FEMC (I. Lippi)

The FEMC consists of more than 9000 lead glass blocks in 4 different geometries. The blocks are arranges in128 modules, which form dismountable units and which require a standard palette for later transport. The total mass of the blocks is 48.6 tons. Each block is equipped with a phototriode and its voltage devider. INFN, who is the owner of the FEMC, is currently deciding what to do with the material afterwards.