Wire aging of hydrocarbon gases with TMAE additions

Conference · Wed Oct 01 04:00:00 EDT 1986

OSTI ID:6967302

Va'vra, J

We report on experimental results describing wire aging properties of the CRID/RICH detectors in the TMAE gas environment. This test used 7 ..mu..m and 33 ..mu..m diameter carbon fibers, and 20 ..mu..m diameter gold-plated tungsten wires as sense wires, and operated in gas mixtures of either CH/sub 4/ or C/sub 2/H/sub 6/ at 1 atm, together with 0.6 Torr of the photoionizing vapor TMAE (tetrakis dimethylamino ethylene), which serves as a photocathode in the CRID detectors. The wires were damaged by the /sup 55/Fe x-rays. This paper is based on irradiation of 20 wires, each being a separate test. The gas purity was consistent with requirements of CRID detectors (<1 ppM of oxygen, <1 ppM of water). The test explored the aging as a function of wire diameter, wire material, gas flow, gas temperature, rate of radiation and gas type. Several chemical analyses of the deposit samples were performed (FTIR, ESCA and GC-MS techniques).

• Research Organization: Stanford Linear Accelerator Center, Menlo Park, CA (USA)
• DOE Contract Number: AC03-76SF00515
• OSTI ID: 6967302
• Report Number(s): SLAC-PUB-4116; CONF-861007-9; ON: DE87003263
• Country of Publication: United States
• Language: English

Related Subjects

440104* -- Radiation Instrumentation-- High Energy Physics Instrumentation
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
ADDITIVES
AGING
ALKANES
AMINES
CHERENKOV COUNTERS
ETHANE
FLUID FLOW
GAS FLOW
HYDROCARBONS
MATERIALS
MEASURING INSTRUMENTS
METHANE
ORGANIC COMPOUNDS
RADIATION DETECTORS
RADIATION EFFECTS
TEMPERATURE DEPENDENCE
WIRES