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Papers by Zaven Guiragossian

Author(s): Birge, Robert W.; Ely, Robert P.; Schumann, Thomas; Guiragossian, Zaven G.T.; Whitehea... more Author(s): Birge, Robert W.; Ely, Robert P.; Schumann, Thomas; Guiragossian, Zaven G.T.; Whitehead, Marian N.

$Research paper thumbnail of Study of Pion-Pion Resonances in 3.3-BeV p^{-}-p Interactions$

Also isued as UCRL-10731. Thesis (Ph. D. in Physics)--University of California, Berkeley, June 19... more Also isued as UCRL-10731. Thesis (Ph. D. in Physics)--University of California, Berkeley, June 1962. Includes bibliographical references (leaves 70-71). Microfilm. s

Nuclear Instruments and Methods, 1973

Signal shaping properties are demonstrated with a large NaI(Tl) crystal assembly, 20 in. thick an... more Signal shaping properties are demonstrated with a large NaI(Tl) crystal assembly, 20 in. thick and 30 in. in diameter. Correlated energy resolution responses are shown for total energy absorption in the crystal from 580 MeV electrons. Light collection optics by diffuse reflection most likely determined the 10~ -to -90~ rise-time of signals of 80 nsec, connected with the transit time of trapped light, before it reaches a photocathode surface. Using a signal clipping technique, the trailing edge of pulses are shaped to have base-lines entirely restored to zero. Providing good energy resolution, signals are obtained which are shaped to have 200 nsec full-width at base. The energy resolution responses from signal pulseheight measurement are demonstrated. Further improvements to obtain

We present the analysis of the reaction pi-p -->pi-pi+n at 16 GeV/c. The total cross section f... more We present the analysis of the reaction pi-p -->pi-pi+n at 16 GeV/c. The total cross section for this channel was measured to be 0.40 +/- 0.08 mb and production cross sections of 52 +/- 13 omegab and 38 +/- 9 omegab were determined for the varrhoo and fo resonances, respectively. A comparison with the one-pion-exchange model of Wolf shows good agreement with our data.

The extraction of metals in known metallurgical methods is pursued on the basis of separating as ... more The extraction of metals in known metallurgical methods is pursued on the basis of separating as much as possible the desired metal's content from the ore concentrate, in the most economical manner. When these principles are also applied to the extraction of heavy metals, the related environmental factors do not readily meet with requirements. Today, an acceptable extraction technology for metals must satisfy the need to produce the deep separation of metals from their source in both economical and environmentally safe manner. This pertains to the direction of our ongoing research and development, among others in the field of environmental remediation. Earlier, we successfully addressed in an environmentally safe manner the selective extraction of radioactive isotopes from liquid radioactive wastes, produced at Armenia's Metzamor Nuclear Power Plant and implemented a functioning LRW station at the NPP. Currently, we extended our new electrodialysis-based electrolytic method ...

The concept of large-radius multistage coaxial cyclotrons having separated orbits is described, t... more The concept of large-radius multistage coaxial cyclotrons having separated orbits is described, to generate proton beams of 120-2000 MeV energy at tens of GW pulsed and hundreds of MW in continuous beam power operation. Accelerated beam losses must be less than 0.1 W/m for the intercepted average beam power linear density. The concept is inherently configured to actively compensate the longitudinal and transverse space charge expansion in beam bunches. These are based on (1) actively varying the bunch acceleration equilibrium phase while maintaining isochronism, independently for each cyclotron turns; (2) independently changing the acceleration voltage for each turn together with orbit corrections that preserve isochronism; (3) independently changing the transverse betatron oscillation tune shift, to assure non-resonant operation. Also, (4) sextupole lenses are included to compensate for chromaticity effects. Moreover, the concept is based on optimum uses of practical successful res...

An asynchronous accelerator is described, in which the principle of its operation permits the act... more An asynchronous accelerator is described, in which the principle of its operation permits the active longitudinal bunch compression of accelerated proton beams, to overcome the space charge limitation effects of intense bunches. It is shown that accelerated bunches from an RFQ linac can be adapted for Asynchronac injection for a multiple of choices in the acceleration frequencies of the RFQ and the Asynchronac. The offered new type of accelerator system is especially suitable to accelerate proton beams for up to 100MeV energy and hundreds of mA average current.

Nuclear Instruments and Methods, 1973

We propose to measure the inclusive deep inelastic electronnucleon scattering cross sections on h... more We propose to measure the inclusive deep inelastic electronnucleon scattering cross sections on hydrogen and deuterium. Cross sections will be measured in the range of momentum transfers = 0.160 (GeV jc)2 and = 160.0 (Gevjc)2 , in the range of recoil hadronic mass squared of vf1. = 2 Gel and ml.n

Nuclear Instruments and Methods, 1969

ABSTRACT A multi-GeV monochromatic photon beam is operational at SLAC. The energy spectrum consis... more ABSTRACT A multi-GeV monochromatic photon beam is operational at SLAC. The energy spectrum consists of a monochromatic part, derived from the in-flight annihilation of positrons, superimposed on the usual thin target bremsstrahlung. The beam has been successfully utilized in the study of photoproduction processes by both bubble chamber and spark chamber techniques.

$Research paper thumbnail of Orbital-Angular-Momentum Structure of the A_{1} Meson$

Physical Review D, 1970

The orbital angular momentum of the Al meson produced from 7r-p -+7r-n-$p at 16 GeV/c was studied... more The orbital angular momentum of the Al meson produced from 7r-p -+7r-n-$p at 16 GeV/c was studied by analyzing the decay angular distributions in the par-state. A completely Bose-symmetrized formalism was used to measure the ratio,

$Research paper thumbnail of Study of Pion-Pion Resonances in 3.3-BeV p^{-}-p Interactions$

Nuclear Instruments and Methods, 1973

Nuclear Instruments and Methods, 1969

$Research paper thumbnail of Orbital-Angular-Momentum Structure of the A_{1} Meson$

Physical Review D, 1970