A cylindrical drift chamber for radiative muon capture experiments at TRIUMF

Conference · Fri Jun 01 00:00:00 EDT 1990 · IEEE Transactions on Nuclear Science (Institute of Electrical and Electronics Engineers); (USA)

OSTI ID:6872777

Henderson, R S; Dawson, R J; Azuelos, G; Robertson, B C ^[1]; Hasinoff, M D; Ahamad, S; Gorringe, T P ^[2]; Serna-Angel, A; Blecher, M; Wright, D H ^[3]

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1. TRIUMF, Vancouver, BC (Canada)
2. Melbourne Univ., Parkville (Australia)
3. Virginia Polytechnic Inst. and State Univ., Blacksburg, VA (USA)

In the Standard Model, the weak interaction is purely V-A in character. However in semileptonic reactions the strong force induces additional couplings. Radiative muon capture (RMC), {mu}{sup {minus}}{ital Z} {r arrow} {nu}({ital Z}{minus}1){gamma}, is a process which is particularly sensitive to the induced pseudoscalar coupling constant, {ital g{sub p}}, which is still very poorly determined experimentally. Due to the extremely small branching ratio ({approximately} 6 {times} 10{sup {minus}8}), the elementary reaction {mu}{sup {minus}}{ital p} {r arrow} {nu}{ital n}{gamma} has never been measured. Effort to date has concentrated on nuclear RMC where the branching ratio is much larger, but the interpretation of these results is hindered by nuclear structure uncertainties. A measurement is being carried out at TRIUMF to determine the rate of RMC on hydrogen to a precision of 8% leading to a determination of {ital g{sub p}} with an error of 10%. The detection system is based on a large volume cylindrical drift chamber, in an axial magnetic field, acting as an e{sup +}e{sup {minus}} pair spectrometer with a solid angle of {approx equal} 2 {pi}. The design, construction and performance of the cylindrical drift chamber are discussed.

• OSTI ID: 6872777
• Report Number(s): CONF-900143-; CODEN: IETNA; TRN: 90-031541
• Journal Information: IEEE Transactions on Nuclear Science (Institute of Electrical and Electronics Engineers); (USA), Vol. 37:3; Conference: Institute for Electronic and Electrical Engineers (IEEE) nuclear science symposium, San Francisco, CA (USA), 15-19 Jan 1990; ISSN 0018-9499
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
DRIFT CHAMBERS
DESIGN
TRIUMF CYCLOTRON
BRANCHING RATIO
COUPLING CONSTANTS
ELECTRON-POSITRON INTERACTIONS
EXPERIMENT PLANNING
HIGH ENERGY PHYSICS
MEV RANGE 10-100
MUONS
PERFORMANCE
PHOTONS
SEMILEPTONIC DECAY
ACCELERATORS
CYCLIC ACCELERATORS
CYCLOTRONS
DECAY
ELEMENTARY PARTICLES
ENERGY RANGE
FERMIONS
INTERACTIONS
ISOCHRONOUS CYCLOTRONS
LEPTON-LEPTON INTERACTIONS
LEPTONS
MASSLESS PARTICLES
MEASURING INSTRUMENTS
MEV RANGE
MULTIWIRE PROPORTIONAL CHAMBERS
PARTICLE DECAY
PARTICLE INTERACTIONS
PHYSICS
PLANNING
PROPORTIONAL COUNTERS
RADIATION DETECTORS
WEAK PARTICLE DECAY
430303* - Particle Accelerators- Experimental Facilities & Equipment
440104 - Radiation Instrumentation- High Energy Physics Instrumentation