15 research outputs found
Development of a Momentum Determined Electron Beam in the 1 -45 GeV Range
A beam line for electrons with energies in the range of 1 to 45 GeV, low
contamination of hadrons and muons and high intensity up to 10^6 per
accelerator spill at 27 GeV was setup at U70 accelerator in Protvino, Russia. A
beam tagging system based on drift chambers with 160 micron resolution was able
to measure relative electron beam momentum precisely. The resolution sigma_p p
was 0.13% at 45 GeV where multiple scattering is negligible. This test beam
setup provided the possibility to study properties of lead tungstate crystals
(PbWO_4) for the BTeV experiment at Fermilab.Comment: 12 pages, 8 figures; work done by the BTeV Electromagnetic
Calorimeter grou
Study of Radiation Damage in Lead Tungstate Crystals Using Intense High Energy Beams
We report on the effects of radiation on the light output of lead tungstate
crystals. The crystals were irradiated by pure, intense high energy electron
and hadron beams as well as by a mixture of hadrons, neutrons and gammas. The
crystals were manufactured in Bogoroditsk, Apatity (both Russia), and Shanghai
(China). These studies were carried out at the 70-GeV proton accelerator in
Protvino
Beam test results of a PbWO4 crystal calorimeter prototype
Beam tests of an EM-calorimeter prototype made of PbWO4 crystals, produced after significant improvement in growth technology, have been performed at the CERN SPS. The measured energy resolution is σE/E = 2.8%/√E ⊕ 0.47%. © 1995.SCOPUS: ar.jinfo:eu-repo/semantics/publishe
POLARIZATION EFFECTS IN CHARGE-EXCHANGE REACTION AT 40 GeV/c
Nous présentons des résultats obtenus dans l'étude des réactions π-p → π°n, π-p → ηn, π-p → η'(958)n, π-p → f (1270)n à 40 GeV/c. Nous avons observé quelques nouveaux phénomènes dans le comportement de ces réactions.The results on measuring the asymmetries in the reactions π-p → π°n, π-p → ηn, π-p → η'(958)n, π-p → f (1270)n at 40 GeV/c are presented. Some new phenomena have been discovered in the asymmetry behaviour in these reactions