Accession Number DE2012-1038548
Title Progress on the Upgrade of the CMS Hadron Calorimeter Front-End Electronics.
Publication Date Nov 2011
Media Count 6p
Personal Author J. Anderson J. Whitmore
Abstract We present a scheme to upgrade the CMS HCAL front-end electronics in the second long shutdown to upgrade the LHC (LS2), which is expected to occur around 2018. The HCAL electronics upgrade is required to handle the major instantaneous luminosity increase (up to 5 * 10(sup 34) cm(sup -2) s(sup -1)) and an expected integrated luminosity of (approx)3000 fb(sup -1). A key aspect of the HCAL upgrade is to read out longitudinal segmentation information to improve background rejection, energy resolution, and electron isolation at the L1 trigger. This paper focuses on the requirements for the new electronics and on the proposed solutions. The requirements include increased channel count, additional timing capabilities, and additional redundancy. The electronics are required to operate in a harsh environment and are constrained by the existing infrastructure. The proposed solutions span from chip level to system level. They include the development of a new ASIC ADC, the design and testing of higher speed transmitters to handle the increased data volume, the evaluation and use of circuits from other developments, evaluation of commercial FPGAs, better thermal design, and improvements in the overall readout architecture. We will report on the progress of the designs for these upgraded systems, along with performance requirements and initial design studies.
Keywords Calorimeters
Computer architecture
Design
Electrons
Energy resolution
Evaluation
Hadrons
Luminosity
Performance
Physics
Redundancy
Shower counters
Shutdown
Testing
Velocity


 
Source Agency Technical Information Center Oak Ridge Tennessee
NTIS Subject Category 46 - Physics
77E - Nuclear Instrumentation
Corporate Author Fermi National Accelerator Lab., Batavia, IL.
Document Type Technical report
Title Note N/A
NTIS Issue Number 1223
Contract Number DE-AC02-07CH11359

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