The Mark III vertex chamber

Conference · Wed Jul 01 04:00:00 EDT 1987

OSTI ID:6246192

Adler, J; Bolton, T; Bunnell, K; Cassell, R; Cheu, E; Freese, T; Grab, C; Mazaheri, G; Mir, R; Odian, A

The design and construction of the new Mark III vertex chamber is described. Initial tests with cosmic rays prove the ability of track reconstruction and yield triplet resolutions below 50 ..mu..m at 3 atm using argon/ethane (50:50). Also performed are studies using a prototype of a pressurized wire vertex chamber with 8 mm diameter straw geometry. Spatial resolution of 35mm was obtained using dimethyl ether (DME) at 1 atm and 30 ..mu..m using argon/ethane (50/50 mixture) at 4 atm. Preliminary studies indicate the DME to adversely affect such materials as aluminized Mylar and Delrin.

• Research Organization: California Inst. of Tech., Pasadena (USA); California Univ., Santa Cruz (USA); Illinois Univ., Urbana (USA); Stanford Linear Accelerator Center, Menlo Park, CA (USA); Washington Univ., Seattle (USA)
• DOE Contract Number: AC03-76SF00515; AC03-81ER40050; AC02-76ER01195
• OSTI ID: 6246192
• Report Number(s): SLAC-PUB-4371; CONF-870632-2; ON: DE87014316
• Country of Publication: United States
• Language: English

Related Subjects

440104* -- Radiation Instrumentation-- High Energy Physics Instrumentation
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
ALKANES
ARGON
COSMIC RAY DETECTION
DESIGN
DETECTION
DME
DRIFT CHAMBERS
ELEMENTS
ESTERS
ETHANE
ETHERS
FLUIDS
GASES
HYDROCARBONS
MATERIALS
MEASURING INSTRUMENTS
MULTIWIRE PROPORTIONAL CHAMBERS
MYLAR
NONMETALS
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
ORGANIC POLYMERS
PERFORMANCE TESTING
PETROCHEMICALS
PETROLEUM PRODUCTS
PLASTICS
POLYESTERS
POLYMERS
PROPORTIONAL COUNTERS
RADIATION DETECTION
RADIATION DETECTORS
RARE GASES
RESOLUTION
SPATIAL RESOLUTION
SYNTHETIC MATERIALS
TESTING