Objective
The HERA facility at DESY in Hamburg is designed to collide a 30 GeV electron beam with 820 GeV protons. One of the large general purpose detectors, H1, is operated by an international team of about 350 physicists from 35 different institutes. The H1 experiment studies all aspects of the physics of ep collisions. This research project is concerned with a particular class of reactions in which the proton remains intact after an inelastic collision with an electron. These so-called diffractive scattering reactions are of considerable physics interest because the same phenomenon is also observed in hadron-hadron reactions. At HERA new and complementary aspects can be studied which will lead to a better understanding of diffraction.
The protons in diffractive interactions emerge at very small angles below one mrad from the interaction point and lose in general less than 5% of their energy. The protons thus stay inside the beampipe and cannot be recorded with the central H1 detector. After 80m, however, when the beam has passed several magnets belonging to the HERA machine, the diffractively scattered protons are bent away from the circulating beam by several mm and they can be observed in detectors near the beam. The problem is that detector elements cannot be permanently installed so close to the beam because at injection the beam needs much more space than at 820 GeV and a counter close to the central orbit would limit the aperture. Therefore a technique is employed whereby a plunger vessel which houses the detector elements is moved into the machine vacuum after stable beam conditions have been achieved. Two of these so-called Roman pots are installed at 80 and 90 m behind the H1 experiment.
The deflection of the scattered protons is small and in order to allow a reconstruction of their momenta a high resolution detector is needed. In H1 hodoscopes of scintillating fibres with 1 mm diameter will be used or, at a later stage, micro strip gas counters with a superior resolution.
The project is concerned with the development of channel plate photomultipliers to read out the light signals of the scintillating fibres. These will have a photocathode with about 100 pixels with a typical size of 1.5 x 1.5 mm2. The photomultipliers will have to meet certain specifications: small cross talk between neighbouring channels, uniform gain for all pixels, high stability and rate capability. The other route, which is mainly pursued by the Lebedev Institute, embarks on the development of a new technique with potentially better resolution. The so-called microstrips gas detectors employ the principle of gas amplification after the passage of an ionising particle. The signals will be recorded on 50 m wide strips which are etched onto a resistive substrate.
Fields of science (EuroSciVoc)
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
This project has not yet been classified with EuroSciVoc.
Be the first one to suggest relevant scientific fields and help us improve our classification service
You need to log in or register to use this function
Programme(s)
Multi-annual funding programmes that define the EU’s priorities for research and innovation.
Multi-annual funding programmes that define the EU’s priorities for research and innovation.
Topic(s)
Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
Call for proposal
Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.
projects.no_data
Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.
Funding Scheme
Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
projects.no_data
Coordinator
22603 Hamburg
Germany
The total costs incurred by this organisation to participate in the project, including direct and indirect costs. This amount is a subset of the overall project budget.