Improved gas mixtures for gas-filled particle detectors

Patent ·

OSTI ID:5596520

Christophorou, L G; McCorkle, D L; Maxey, D V; Carter, J G

Improved binary and tertiary gas mixture for gas-filled particle detectors are provided. The components are chosen on the basis of the principle that the first component is one gas or mixture of two gases having a large electron scattering cross section at energies of about 0.5 eV and higher, and the second component is a gas (Ar) having a very small cross section at and below about 0.5 eV; whereby fast electrons in the gaseous mixture are slowed into the energy range of about 0.5 eV where the cross section for the mixture is small and hence the electron mean free path is large. The reduction in both the cross section and the electron energy results in an increase in the drift velocity of the electrons in the gas mixtures over that for the separate components for a range of E/P (pressure-reduced electron field) values. Several gas mixtures are provided that provide faster response in gas-filled detectors for convenient E/P ranges as compared with conventional gas mixtures.

• DOE Contract Number: W-7405-ENG-26
• Assignee: TIC; EDB-80-050779; ERA-05-019258
• Patent Number(s): None
• OSTI ID: 5596520
• Country of Publication: United States
• Language: English

Related Subjects

440101* -- Radiation Instrumentation-- General Detectors or Monitors & Radiometric Instruments
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
ACETYLENE
ALKANES
ALKYNES
ARGON
CALIBRATION
CARBON COMPOUNDS
CARBON FLUORIDES
CROSS SECTIONS
CRYOGENIC FLUIDS
ELECTRONS
ELEMENTARY PARTICLES
ELEMENTS
FERMIONS
FLUIDS
FLUORIDES
FLUORINE COMPOUNDS
GASES
HALIDES
HALOGEN COMPOUNDS
HYDROCARBONS
LEPTONS
MEASURING INSTRUMENTS
METHANE
NONMETALS
ORGANIC COMPOUNDS
POSITION SENSITIVE DETECTORS
RADIATION DETECTORS
RARE GASES
RESOLUTION
SCATTERING
SPATIAL RESOLUTION
TIME RESOLUTION
TIMING PROPERTIES