منابع مشابه
THE CONTINUOUS ELECTRON BEAM ACCELERATOR FACILITY: CEBAF at the Jefferson Laboratory
■ Abstract The Jefferson Laboratory’s superconducting radiofrequency (srf ) Continuous Electron Beam Accelerator Facility (CEBAF) provides multi-GeV continuouswave (cw) beams for experiments at the nuclear and particle physics interface. CEBAF comprises two antiparallel linacs linked by nine recirculation beam lines for up to five passes. By the early 1990s, accelerator installation was proceed...
متن کاملThe CEBAF Control System
CEBAF has recently upgraded its accelerator control system to use EPICS, a control system toolkit being developed by a collaboration among laboratories in the US and Europe. The migration to EPICS has taken place during a year of intense commissioning activity, with new and old control systems operating concurrently. Existing CAMAC hardware was preserved by adding a CAMAC serial highway link to...
متن کاملElectron Spin Precession at CEBAF
The nuclear physics experiments at the Thomas Jefferson National Accelerator Facility often require longitudinally polarized electrons to be simultaneously delivered to three experimental halls. The degree of longitudinal polarization to each hall varies as function of the accelerator settings, making it challenging in certain situations to deliver a high degree of longitudinal polarization to ...
متن کاملThe Cebaf Beam Scraping Monitor*
The Beam Scraping Monitor (BSM) is used to detect small amounts of beam loss in Jefferson Labs Continuous Electron Beam Accelerator Facility (CEBAF). The BSM acts as an early warning system that alerts CEBAF operators when the beam loss exceeds 10 to 20 nA. This allows the CEBAF operators to adjust the beam orbit before beam loss reaches the Beam Loss Accounting (BLA) system threshold (present...
متن کاملAre Degree Achievements Really Achievements?
This paper, which builds of the work of Hay, Kennedy, and Levin (1999), examines the puzzling aspectual behavior of so-called degree achievements. Drawing evidence from Mandarin Chinese, I argue that degree achievements without difference values denote punctual events, i.e., they are true achievements. I present an analysis that is consistent with facts from both English and Mandarin; to explai...
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ژورنال
عنوان ژورنال: Journal of Physics: Conference Series
سال: 2011
ISSN: 1742-6596
DOI: 10.1088/1742-6596/299/1/012015