In the next millennium, the "Standard Model" that encapsulates all knowledge of the physical universe is likely to be based on a supersymmetric theory. Such theories predict the existence of supersymmetric particles in addition to the particles currently known. CMS has the opportunity to detect the signature of such particles as missing energy, defined as the difference between the known incoming energy of the colliding beams and the outgoing energy recorded in the detector. The key is to make the CMS detector as hermetic as possible.
The Hadron Calorimeter is one of the most important detectors in the end cap region not only from the physics point of view but also as the largest and most powerful detecting element of in the end cap region coupling mechanically and integrating all detectors in that region.
The most important issue of the design is to find a possibility to maintain precisely the 350-ton Hadron Calorimeter in the centre of a very large iron disk (15-meter diameter and 0.6 meter thick).
Additional difficulties are associated with the effect of a huge magnetic force in that region (stemming from a 4 Tesla field). Due to that, the supporting iron disk is bending by a few centimetres in the centre (like a membrane or a Belleville washer). In such difficult operational conditions the precision requirement for the position of the calorimeters and the physics detectors is high and very difficult to attain.
The design of the Interface System, must satisfy the following requirements:
ensure stable spatial position of the: End cap Hadron Calorimeter, Electromagnetic Calorimeter equipped with Preshower and ME1/1 Muon Station;
allow optimal cable and cooling system layouts;
allow easy access for maintenance during the operation period of CMS;
permit assembly and disassembly of ME1/1, RPC and Calorimeters, without damaging or destroying the mechanical structural elements.

The research activity of the Project includes the following tasks:
T1. Conceptual design and development of the engineering drawings of the Interface System;
T2.Strength analysis of the Interface System elements;
T3.Raw material selection for manufacturing the Interface System. Design of the test systems and dedicated tooling. Providing test of materials before delivery to the manufacturers;
T4. Defining the quality control procedures for the production stage, design of the test systems and dedicated tooling. Providing testing procedures and tests for all the parts of the Interface System during the production stage;
T5.Development of the integration procedure and assembly scenario;
T6. Development of the quality control procedures, control tooling and mechanical tests for the final assembly and installation of the Interface System in the CMS experimental set-up.

The design and construction of the endcap region of the CMS apparatus in which is concentrated, practically, all types of detectors, is requiring the participation of many CMS groups dedicated to subsystems (more then 1300 scientists and engineers from 132 institutions of 32 countries). The teams involved in this proposal bring together engineers who designed the CMS endcaps, physicists who established the performance of the detector and production experts who fabricated Endcap Hadron Calorimeter.
The co-operation between the INTAS and NIS groups is essential in view of the complexity of the project.
The result of the research will be disseminated in scientific papers published on refereed journals, in reports presented at meetings and/or internal notes of the CMS collaborations, in order to make the experience cumulated in the research available to other HEP experiments, and other field of application.