Wire aging of hydrocarbon gases with TMAE additions
The authors 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 Fe/sup 55/ 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, Stanford Univ., Stanford, CA 94305
- DOE Contract Number:
- AC03-76SF00515
- OSTI ID:
- 6707956
- Report Number(s):
- CONF-861007-; TRN: 87-015037
- Journal Information:
- IEEE Trans. Nucl. Sci.; (United States), Vol. NS-34:1; Conference: Nuclear science and nuclear power systems symposium, Washington, DC, USA, 29 Oct 1986
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
CHERENKOV COUNTERS
MATERIALS TESTING
WIRES
AGING
PHYSICAL RADIATION EFFECTS
AMINES
CARBON FIBERS
ETHYLENE
EXPERIMENTAL DATA
GAS FLOW
GOLD
IRON 55
MASS SPECTROSCOPY
MEDIUM PRESSURE
MEDIUM VACUUM
PHOTOCATHODES
PHOTOIONIZATION
TEMPERATURE EFFECTS
TUNGSTEN
X RADIATION
ALKENES
BETA DECAY RADIOISOTOPES
CATHODES
DATA
ELECTRODES
ELECTROMAGNETIC RADIATION
ELECTRON CAPTURE RADIOISOTOPES
ELEMENTS
EVEN-ODD NUCLEI
FIBERS
FLUID FLOW
HYDROCARBONS
INFORMATION
INTERMEDIATE MASS NUCLEI
IONIZATION
IONIZING RADIATIONS
IRON ISOTOPES
ISOTOPES
MEASURING INSTRUMENTS
METALS
NUCLEI
NUMERICAL DATA
ORGANIC COMPOUNDS
RADIATION DETECTORS
RADIATION EFFECTS
RADIATIONS
RADIOISOTOPES
SPECTROSCOPY
TESTING
TRANSITION ELEMENTS
YEARS LIVING RADIOISOTOPES
440104* - Radiation Instrumentation- High Energy Physics Instrumentation
440200 - Radiation Effects on Instrument Components
Instruments
or Electronic Systems