Operation of the AFS at L = 1. 4 x 10/sup 32/ cm/sup -2/ sec/sup -1/: a first look at data at high luminosity from the CERN ISR. [Axial Field Spectrometer]
Conference
·
OSTI ID:6052952
In December 1982 a run was made at the CERN ISR which utilized the superconducting low beta quadrupoles in intersection I8 at the ISR and achieved a luminosity of 1.4 x 10/sup 32/ cm/sup -2/ sec/sup -1/ for 26 x 26 GeV pp collisions. At this luminosity the mean time between inelastic collisions is about 200 ns. A comparison run was also made at the same energy with a luminosity of 3.0 x 10/sup 30/ cm/sup -2/ sec/sup -1/. The luminosity under normal running conditions is typically 1.5 x 10/sup 31/ cm/sup -2/ sec/sup -1/. Data were collected with the Axial Field Spectrometer with a variety of calorimeter triggers. The calorimeter is a uranium-scintillator sandwich type with wavelength shifter readout and covers the polar angle range 50/sup 0/ < theta < 130/sup 0/. The shaping amplifiers used in the trigger have an integration time of 60 ns and the ADC gate for the photomultiplier signals has a length of 120 ns. The triggers ranged from a nonselective total transverse energy trigger (E/sub TOT/) to more selective jet and single particle triggers. The jet trigger summed the transverse energy in an azimuthal range ..delta.. phi approx. = 45/sup 0/. We have compared several trigger rates at the two luminosities to see if the observed rates scale with the luminosity.
- Research Organization:
- Brookhaven National Lab., Upton, NY (USA)
- DOE Contract Number:
- AC02-76CH00016
- OSTI ID:
- 6052952
- Report Number(s):
- BNL-32849; CONF-830224-11; ON: DE83011352
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
43 PARTICLE ACCELERATORS
430303* -- Particle Accelerators-- Experimental Facilities & Equipment
440104 -- Radiation Instrumentation-- High Energy Physics Instrumentation
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
ACCELERATOR FACILITIES
BARYON-BARYON INTERACTIONS
CERN ISR
DRIFT CHAMBERS
ELECTRONIC CIRCUITS
HADRON-HADRON INTERACTIONS
INTERACTIONS
LUMINOSITY
MAGNETIC SPECTROMETERS
MEASURING INSTRUMENTS
MULTIWIRE PROPORTIONAL CHAMBERS
NUCLEON-NUCLEON INTERACTIONS
OPERATION
OPTICAL PROPERTIES
PARTICLE INTERACTIONS
PHYSICAL PROPERTIES
PROPORTIONAL COUNTERS
PROTON-NUCLEON INTERACTIONS
PROTON-PROTON INTERACTIONS
PULSE CIRCUITS
RADIATION DETECTORS
SCINTILLATION COUNTERS
SHOWER COUNTERS
SPECTROMETERS
STORAGE RINGS
TIMING PROPERTIES
TRIGGER CIRCUITS
430303* -- Particle Accelerators-- Experimental Facilities & Equipment
440104 -- Radiation Instrumentation-- High Energy Physics Instrumentation
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
ACCELERATOR FACILITIES
BARYON-BARYON INTERACTIONS
CERN ISR
DRIFT CHAMBERS
ELECTRONIC CIRCUITS
HADRON-HADRON INTERACTIONS
INTERACTIONS
LUMINOSITY
MAGNETIC SPECTROMETERS
MEASURING INSTRUMENTS
MULTIWIRE PROPORTIONAL CHAMBERS
NUCLEON-NUCLEON INTERACTIONS
OPERATION
OPTICAL PROPERTIES
PARTICLE INTERACTIONS
PHYSICAL PROPERTIES
PROPORTIONAL COUNTERS
PROTON-NUCLEON INTERACTIONS
PROTON-PROTON INTERACTIONS
PULSE CIRCUITS
RADIATION DETECTORS
SCINTILLATION COUNTERS
SHOWER COUNTERS
SPECTROMETERS
STORAGE RINGS
TIMING PROPERTIES
TRIGGER CIRCUITS