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Title: Small angle detectors for study diffractive processes with CMS

The approach and detectors for diffractive physics based on two current projects—Forward Shower Counter (FSC) and Proton Precision Spectrometer (PPS) are presented. FSC system consists of six (3+3) Stations of scintillator counters, which surround closely the beam pipes along 59 m < |z| < 140 m from IP5 on both plus (+) and minus (-) sides. These will detect showers from very forward particles with rapidity 7.5 < |η| < 10 interacting in the beam pipe and surrounding material. FSC allow measurements of single diffraction: p+p → p+G+X (where G is rapidity gap) for lower masses and double diffraction p+p → X+G+X with a large central rapidity gap. The counters can also be used for beam real-time monitoring and will make an invaluable contribution to the understanding of the background environment and its topology. PPS is designed for study the central exclusive production pp → p+X+p, where the + signs denote the absence of hadronic activity (that is, the presence of a rapidity gap) between the outgoing protons and the decay products of the central system X. The precise measurement of the kinematical parameters of the outgoing protons enables to study the properties of the central state X. In PPS part we consider the detector for high precision timing of these protons—QUARTIC. It consists ofmore » L-shape bars with quartz or sapphire radiator. The time resolution of the QUARTIC prototypes achieved ≈ 10 ps.« less
Authors:
 [1] ;  [2] ;  [2] ;  [2] ;  [1] ;  [1] ;  [3] ;  [4] ;  [5] ;  [1] ;  [6] ;  [6] ;  [2]
  1. Fermilab
  2. CERN
  3. Kansas State U.
  4. INFN, Trieste
  5. Bucharest, IFIN-HH
  6. Serpukhov, IHEP
Publication Date:
OSTI Identifier:
1326618
Report Number(s):
FERMILAB-CONF-14-510-CMS-E
1323541
DOE Contract Number:
AC02-07CH11359
Resource Type:
Conference
Resource Relation:
Journal Name: JINST; Journal Volume: 9; Journal Issue: 10; Conference: 11th International Conference on Instrumentation for Colliding Beam Physics, Novosibirsk, Russia, 02/24-03/01/2014
Research Org:
Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
Sponsoring Org:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY