Several detector types fulfil these physics requirements. In our collaboration there are 2 groups (JINR-Dubna and IHEP-Protvino) that have been previously involved in the construction of muon detectors.
Furthermore Dubna Iarocci tubes are used as muon surround chambers in DELPHI  and an agreement with the D0 collaboration at Fermilab to produce 6000 Iarocci tubes was signed recently.
Typical characteristics of the PIT are the following:
This figure replaces the wrongly labeled figure 5.15 in the proposal.
The construction of the 6000 tubes for the D0 experiment is foreseen for 1997. The preparation work and necessary R&D will be financed by Fermilab and JINR. The 1200 tubes for COMPASS could be produced in 1998 as an extension of the activity connected with the Fermilab contract. The average capacity of the workshop is 50 tubes per day and a total of 3 months is needed for the production and testing of all the tubes. The tubes including frontend electronics would be financed by Dubna. The corresponding cost estimate is 310 kCHF.
IHEP would be responsible for construction and production of both tubes and frontend electronics (amplifiers & shapers), equipped with low voltage supplies. The corresponding cost estimate is about 170 kCHF.
The two different detector types for the muon detection in COMPASS meet the requirements of the experiment. The share of responsibilities for the subdetectors between the two groups follows the expertise of the institutes.