NASA Scientific and Technical Aerospace Reports

The magnetic harmonic errors of the Fermilab Recycler ring were examined using circulating beam data taken with closed
local orbit bumps. Data was first parsed into harmonic orbits of first, second, and third order. Each of which was analyzed for
sources of magnetic errors of corresponding order. This study was made possible only with the incredible resolution of a new
BPM system that was commissioned after June of 2003.
NTIS
Error Analysis; Multipoles; Errors; Circulation
20060002062 Fermi National Accelerator Lab., Batavia, IL, USA
Tevatron Admittance Measurement
Zhang, X. L.; Shiltsev, V.; Tan, C. Y.; January 2005; 8 pp.; In English
Report No.(s): DE2005-15017069; FERMILAB-CONF-05-130-AD; No Copyright; Avail.: National Technical Information
Service (NTIS)
We measured the Tevatron beam admittance by the means of exciting the beam with noise and causing emittance growth.
The noise power was about 3W with a bandwidth of 100Hz and centered either in the horizontal betatron frequency or vertical
betatron frequency. We were able to controllably blow the beam emittance up quickly. From the point where the beam
emittance stopped growing, we measured the beam acceptance of the Tevatron.
NTIS
Electrical Impedance; Emittance; Particle Accelerators; Betatrons
20060002063 Fermi National Accelerator Lab., Batavia, IL, USA
BTeV Trigger/DAQ Innovations
Votava, M.; January 2005; 10 pp.; In English
Report No.(s): DE2005-15017074; FERMILAB-CONF-05-227-CD-E; No Copyright; Avail.: National Technical Information
Service (NTIS)
The BTeV experiment was a collider based high energy physics (HEP) B-physics experiment proposed at Fermilab. It
included a large-scale, high speed trigger/data acquisition (DAQ) system, reading data off the detector at 500 Gbytes/sec and
writing to mass storage at 200 Mbytes/sec. The online design was considered to be highly credible in terms of technical
feasibility, schedule and cost. This paper will give an overview of the overall trigger/DAQ architecture, highlight some of the
challenges, and describe the BTeV approach to solving some of the technical challenges. At the time of termination in early
2005, the experiment had just passed its baseline review. Although not fully implemented, many of the architecture choices,
design, and prototype work for the online system (both trigger and DAQ) were well on their way to completion. Other large,
high-speed online systems may have interest in the some of the design choices and directions of BTeV, including (a) a
commodity-based tracking trigger running asynchronously at full rate, (b) the hierarchical control and fault tolerance in a large
real time environment, (c) a partitioning model that supports offline processing on the online farms during idle periods with
plans for dynamic load balancing, and (d) an independent parallel highway architecture.
NTIS
Actuators; Data Acquisition; High Energy Interactions
20060002064 Fermi National Accelerator Lab., Batavia, IL, USA
US Accelerator Contribution to the LHC
Lamm, M. J.; January 2005; 10 pp.; In English
Report No.(s): DE2005-15017075; FERMILAB-CONF-05-168-AD; No Copyright; Avail.: National Technical Information
Service (NTIS)
In 1998, the USA entered into an agreement with CERN to help build the Large Hadron Collider (LHC), with
contributions to the accelerator and to the large HEP detectors. To accomplish this, the US LHC Accelerator Project was
formed, encompassing expertise from Brookhaven National Laboratory (BNL), Fermi National Accelerator Laboratory
(FNAL) and the Lawrence Berkeley National Laboratory (LBNL). This report is a summary of these contributions including
the progress towards project completion, as well as a discussion of future plans for continued US participation in the LHC
accelerator.
NTIS
Hadrons; Elementary Particles
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