Construction and performance of a plastic scintillating fiber target for a rare kaon decay experiment
A K/sup +/ stopping target consisting of 2269 plastic fibers, 2 mm diameter and 3.12 m long has been installed in an experiment searching for the rare decay K/sup +/ to ..pi nu../bar nu/ at Brookhaven National Laboratory. The fibers are bundled onto 379 photomultiplier tube and base assemblies with single photoelectron resolution. After routing to the counting room, the signals are amplified and then distributed to TDC's and high-pass filter circuits that provide signals to ADC's and to fan-ins that provide a target energy-sum pulse used in the fast triggering logic. A minimum ionizing particle 3 m from the photomultiplier yields 1 photoelectron/mm path. The target provides transverse spatial resolution of 4 mm (FWHM) for the vertex of the K/sup +/ decay and 2 ns timing resolution (FWHM) on the difference between the K/sup +/ stop and the subsequent decay. Details of the target construction and operating performance are provided. 4 refs., 7 figs.
- Research Organization:
- Brookhaven National Lab., Upton, NY (USA)
- DOE Contract Number:
- AC02-76CH00016
- OSTI ID:
- 6233185
- Report Number(s):
- BNL-42403; CONF-8811199-2; ON: DE89010253
- Resource Relation:
- Conference: Workshop on scintillating fiber detector development for the SSC, Batavia, IL, USA, 14 Nov 1988; Other Information: Portions of this document are illegible in microfiche products
- Country of Publication:
- United States
- Language:
- English
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72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
KAONS PLUS
PARTICLE DECAY
PLASTIC SCINTILLATORS
PION DETECTION
BRANCHING RATIO
PERFORMANCE
SPATIAL RESOLUTION
BOSONS
CHARGED PARTICLE DETECTION
DECAY
DETECTION
ELEMENTARY PARTICLES
HADRONS
KAONS
MESONS
PHOSPHORS
PSEUDOSCALAR MESONS
RADIATION DETECTION
RESOLUTION
STRANGE MESONS
STRANGE PARTICLES
440104* - Radiation Instrumentation- High Energy Physics Instrumentation
645100 - High Energy Physics- Particle Interactions & Properties-Experimental