摘要:

The basic design of the TPC is reviewed. The magnets, readout system, calibration problems, and drift gas composition are among the topics covered. (AIP)

ISSN:0094-243X    

DOI:10.1063/1.34317

出版商:AIP    

年代:1984

数据来源: AIP

摘要:

The time projection chamber at TRIUMF is being used to search for muon‐electron conversion. The best spatial resolution in the TPC, &sgr;&bartil;200 &mgr;m, occurs at the minimum drift length and for an optimum track‐to‐anode crossing angle determined by the magnetic field. The observed resolution is dependent on th diffusion of the drifting electrons, the track‐to‐anode crossing angle, E&drarr;×B&drarr; effects near the anode wire and the discrete nature of the ionization process. Distortions due to positive ions leaking back into the drift volume from the anode wire region have been nearly eliminated by the use of a pulsed dual grid system.

ISSN:0094-243X    

DOI:10.1063/1.34311

出版商:AIP    

年代:1984

数据来源: AIP

摘要:

The Time Projection Chamber (TPC) being used at the Los Alamos Meson Physics Facility (LAMPF) for a high statistics normal muon decay experiment is described. It is shown how the experiment will improve upon the limits of the weak interaction coupling constants by a factor of 5 through the measurement of the positron momentum and direction of emission with respect to the muon polarization vector for 108decays of stopped, polarized, positive muons. The TPC apparatus is described, and it is shown that even though more work is to be done to improve the detector acceptance and individual coordinate resolutions, for certain track topologies, the TPC already has a momentum resolution of 0.7% (sigma).

ISSN:0094-243X    

DOI:10.1063/1.34320

出版商:AIP    

年代:1984

数据来源: AIP

摘要:

A helium TPC is being readied for an investigation of 2&ngr; and 0&ngr; double beta decay of82Se. The chamber is designed to display ∼1 MeV electron tracks in a magnetic field of 700 G. Helices fit to the tracks will be used to derive energies and opening angles for pairs of negative electrons originating on the selenium source.

ISSN:0094-243X    

DOI:10.1063/1.34325

出版商:AIP    

年代:1984

数据来源: AIP

摘要:

The design of a time projection chamber (TPC) filled with Xe at high pressure is described. The aim of the project is to measure the neutrinoless &bgr;&bgr; decay of136Xe at the level of 1023years. Guidelines for the choices made in the project and experimental results of prototypes are presented.

ISSN:0094-243X    

DOI:10.1063/1.34326

出版商:AIP    

年代:1984

数据来源: AIP

摘要:

The design of an experiment to study the double beta decay of136Xe is presented. The electron drift velocity determination is considered. (AIP)

ISSN:0094-243X    

DOI:10.1063/1.34327

出版商:AIP    

年代:1984

数据来源: AIP

摘要:

We describe a high pressure hydrogen gas time projection chamber which consists of two cylindrical drift regions each 45 cm in diameter and 75 cm long. Typically, at 15 atm of H2with 2 kV/cm drift field and 7 kV on the 35&mgr; sense wires, the drift velocity is about 0.5 cm/&mgr;sec and the spatial resolution ±200&mgr;.

ISSN:0094-243X    

DOI:10.1063/1.34328

出版商:AIP    

年代:1984

数据来源: AIP

摘要:

The principal features of the liquid argon TPC are outlined and the status of development efforts, particularly at UCI, are discussed.

ISSN:0094-243X    

DOI:10.1063/1.34329

出版商:AIP    

年代:1984

数据来源: AIP

摘要:

The specific choice of an atmospheric medium size TPC for the DELPHI detector is discussed and the specifications and design are described. The expected performance is studied in detail on the basis of measurements and simulation. First results from prototypes for the electronics, field cage and sector plates are presented.

ISSN:0094-243X    

DOI:10.1063/1.34330

出版商:AIP    

年代:1984

数据来源: AIP

摘要:

The TPC designed by the Aleph collaboration is presented. The expected spatial and momentum resolution of the chamber is discussed, stressing the effects due to the high magnetic field and comparing two different geometries for the cathode planes.

ISSN:0094-243X    

DOI:10.1063/1.34309

出版商:AIP    

年代:1984

数据来源: AIP