Conceptual design for the STAR barrel electromagnetic calorimeter support rings
The STAR electromagnetic calorimeter (EMC) will be used to measure the energy of photons and electrons from collisions of beams of particles in the RHIC accelerator under construction at Brookhaven National Laboratory. The present design is documented in the EMC Conceptual Design Report, and consists of a cylindrical barrel and two flat endcap calorimeter sections. The barrel EMC will consist of 120 modules, each subtending 6{degrees} in azimuthal angle about the beam ({phi}), and half the barrel length. Each module will be subdivided into ``towers`` of alternating scintillator and lead, which project to the nominal interaction point. There is a strong coupling between the designs for the EMC and for the conventional solenoidal magnet, which will be located immediately outside the barrel EMC. For example, the inner radius of the magnet must be minimized to lower costs and to reduce the STAR detector`s outer diameter to fit within constraints of the existing detector building. This condition requires the calorimeter modules to be just thick enough to accomplish physics goals and to support their weight with small deflections. This note describes progress in the design of the EMC support rings. Several ring designs and methods of construction have been considered. In addition, installation and alignment problems for both the rings and the rails have been considered in more depth. Finally, revised stress calculations for the recommended ring designs have been performed. Most of this work has been done in close collaboration with the STAR magnet subgroup.
- Research Organization:
- Argonne National Lab., IL (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 10133947
- Report Number(s):
- ANL-HEP-TR--94-13; ON: DE94008426
- Country of Publication:
- United States
- Language:
- English
Similar Records
A conceptual design for the STAR endcap electromagnetic calorimeter
Beam test of the SDC barrel EM calorimeter test module
Finite element analysis of the SDC barrel and endcap calorimeters
Technical Report
·
Mon Aug 09 00:00:00 EDT 1993
·
OSTI ID:10185729
Beam test of the SDC barrel EM calorimeter test module
Technical Report
·
Sun May 01 00:00:00 EDT 1994
·
OSTI ID:10145211
Finite element analysis of the SDC barrel and endcap calorimeters
Technical Report
·
Tue Mar 10 23:00:00 EST 1992
·
OSTI ID:10151898