No abstract available

No abstract available

[en] The Advanced Light Source (ALS), now under construction at the Lawrence Berkeley Laboratory, will be a national user facility for the production of high-brightness and partially coherent soft x-ray and ultraviolet synchrotron radiation. The ALS is based on a low-emittance electron storage ring optimized for operation at 1.5 GeV with insertion devices in 10 long straight sections and 24 premier bend-magnet ports. High-brightness photon beams, from less than 10 eV to more than 2 keV, will be produced by undulators, thereby providing many research opportunities in materials and surface science, biology, atomic physics and chemistry. Wigglers and bend magnets will provide high-flux, broad-band radiation at energies to 10 keV. 6 refs., 6 figs., 2 tabs

[en] STAR (Solenoidal Tracker at RHIC) will be one of two large, sophisticated experiments ready to take data when the Relativistic Heavy Ion Collider (RHIC) comes on-line in 1999. The design of STAR, its construction and commissioning and the physics program using the detector are the responsibility of a collaboration of over 250 members from 30 institutions, world-wide. The overall approach of the STAR Collaboration to the physics challenge of studying collisions of highly relativistic nuclei is to focus on measurements of the properties of the many hadrons produced in the collisions. The STAR detector is optimized to detect and identify hadrons over a large solid angle so that individual events can be characterized, in detail, based on their hadronic content. The broad capabilities of the STAR detector will permit an examination of a wide variety of proposed signatures for the Quark Gluon Plasma (QGP), using the sample of events which, on an event-by-event basis, appear to come from collisions resulting in a large energy density over a nuclear volume. In order to achieve this goal, the STAR experiment is based on a solenoid geometry with tracking detectors using the time projection chamber approach and covering a large range of pseudo-rapidity so that individual tracks can be seen within the very high track density expected in central collisions at RHIC. STAR also uses particle identification by the dE/dx technique and by time-of-flight. Electromagnetic energy is detected in a large, solid-angle calorimeter. The construction of STAR, which will be located in the Wide Angle Hall at the 6 o'clock position at RHIC, formally began in early 1993

No abstract available

[en] Two experimental techniques which are the ingredients for a new generation of charged particle detectors are discussed. These techniques, particle identification by energy loss measurement and long drift imaging chambers are used separately, or in tandem to configure detector systems (e.g., ISIS, BEBC-EPI, CRIRIS, TPC and others) which can obtain high quality data over large solid angles. The basic idea of these detectors is to use as much as is possible of the information left as ionization by charged particles traversing a gaseous medium. This residual ionization trail contains trajectory information and, from the distribution of energy loss, velocity information. Since such information is to be collected over a large volume (large solid angle), ionization electrons are drifted in some of these detectors over large distances to sense elements where the information is extracted

[en] The ratio of real to imaginary parts of the forward scattering amplitude (rho) is a quantity of fundamental interest which should, if possible, be measured through Coulomb-nuclear interference in an early experiment at ISABELLE. If small angle proton-proton elastic scattering is spin independent, then the optical theorem, crossing symmetry, and the basic tenets of quantum field theory allow rho to be written as a dispersion integral of sigma/sub T/(s) over s. The test of such dispersion relations at increasingly higher energies serves to confirm the validity of these assumptions over increasingly smaller distances. A report is given of an effort to determine if such a measurement can be made in the first round of experiments at ISABELLE

[en] By combining the particle-identification function in the same detector volume as the tracking and momentum-measurement functions, this device achieves substantial reduction in overall size

[en] This paper reports on the Advanced Light source (ALS), now under construction at the Lawrence Berkeley Laboratory, which is a national user facility for the production of high-brightness and partially coherent soft x-ray and ultraviolet synchrotron radiation. The ALS is based on a low-emittance electron storage ring optimized for operation at 1.5 GeV with insertion devices in 10 long straight sections and 24 premier bend-magnet ports. High-brightness photon beams, from less than 10 eV to more than 2 keV, will be produced by undulators, thereby providing many research opportunities in materials and surface science, biology, atomic physics and chemistry. Wigglers and bend magnets will provide high-flux, broad-band radiation at energies to 10 keV

No abstract available