HyperCP: A high-rate spectrometer for the study of charged hyperon and kaon decays

The HyperCP experiment (Fermilab E871) was designed to search for rare phenomena in the decays of charged strange particles, in particular CP violation in $\Xi$ and $\Lambda$ hyperon decays with a sensitivity of $10^{-4}$. Intense charged secondary beams were produced by 800 GeV/c protons and momentum-selected by a magnetic channel. Decay products were detected in a large-acceptance, high-rate magnetic spectrometer using multiwire proportional chambers, trigger hodoscopes, a hadronic calorimeter, and a muon-detection system. Nearly identical acceptances and efficiencies for hyperons and antihyperons decaying within an evacuated volume were achieved by reversing the polarities of the channel and spectrometer magnets. A high-rate data-acquisition system enabled 231 billion events to be recorded in twelve months of data-taking.Comment: 107 pages, 45 Postscript figures, 14 tables, Elsevier LaTeX, submitted to Nucl. Instrum. Meth.

A one-campus SSC

Advantages of the one-campus superconducting super collider with bypass-clustered Interaction Region arrangement are enumerated. Designs for double-bypass arrangements with 4 and 6 interaction points are examined and presented. Compared to the conceptual design given in the Conceptual Design Report, the only drawback identified is the additional dipoles required which amounts to approx.20% for the 6 Interaction Point arrangements and approx.10% for the 4 Interaction Point arrangements. (LSP