NASA Scientific and Technical Aerospace Reports

suggests that Cu doping of CdS may affect carrier collection from the CdS.
NTIS
Cadmium; Cadmium Tellurides; Diffusion; Sulfates
20060002418 Fermi National Accelerator Lab., Batavia, IL, USA
Fitting the Luminosity Decay in the Tevatron
McCrory, E.; Shiltsev, V.; Slaughter, A. J.; Xiao, A.; January 2005; 8 pp.; In English
Report No.(s): DE2005-15017089; FERMILAB-CONF-05-189-AD; No Copyright; Avail.: National Technical Information
Service (NTIS)
This paper explores how to fit the decay of the luminosity in the Tevatron. The standard assumptions of a fixed-lifetime
exponential decay are only appropriate for very short time intervals. A ‘1/time’ functional form fits well, and is supported by
analytical derivations. A more complex form, assuming a time-varying lifetime-like term, also produces good results. Changes
in the luminosity can be factored into two phenomena: The luminosity burn-off rate, and the burn-off rate from non-luminosity
effects. This is particularly relevant for the antiprotons in the Tevatron. The luminous and the non-luminous burn rate of the
antiprotons are shown for Tevatron stores.
NTIS
Fitting; Luminosity; Particle Accelerators
20060002419 Fermi National Accelerator Lab., Batavia, IL, USA, Stanford Univ., Stanford, CA USA
Operational Performance of a Bunch by Bunch Digital Damper in the FERMILAB Main Injector
Adamson, P.; Ashmanskas, W. J.; Foster, G. W.; Hansen, S.; Marchionni, A.; January 2005; 8 pp.; In English
Report No.(s): DE2005-15017091; FERMILAB-CONF-05-145-AD; No Copyright; Avail.: National Technical Information
Service (NTIS)
We have implemented a transverse and longitudinal bunch by bunch digital damper system in the Fermilab Main Injector,
using a single digital board for all 3 coordinates. The system has been commissioned over the last year, and is now operational
in all MI cycles, damping beam bunched at both 53MHz and 2.5MHz. We describe the performance of this system both for
collider operations and high-intensity running for the NuMI project.
NTIS
Damping; Injectors; Digital Systems
20060002420 Fermi National Accelerator Lab., Batavia, IL, USA
Signal Processing for Longitudinal Parameters of the Tevatron Beam
Pordes, S.; Crisp, J.; Fellenz, B.; Flora, R.; Para, A.; January 2005; 8 pp.; In English
Report No.(s): DE2005-15017090; FERMILAB-CONF-05-178-AD; No Copyright; Avail.: National Technical Information
Service (NTIS)
We describe the system known as the Tevatron SBD which is used to provide information on the longitudinal parameters
of coalesced beam bunches in the Tevatron. The system has been upgraded over the past year with a new digitizer and
improved software. The quantities provided for each proton and antiproton bunch include the intensity, the longitudinal bunch
profile, the timing of the bunch with respect to the low-level RF, the momentum spread and the longitudinal emittance. The
system is capable of 2 Hz operation and is run at 1 Hz.
NTIS
Analog to Digital Converters; Computer Programs; Computer Systems Programs; Particle Accelerators; Signal Processing
20060002421 Fermi National Accelerator Lab., Batavia, IL, USA
Field Quality Study in NB(3)SN Accelerator Magnets
Kashikhin, V. V.; Ambrosio, G.; Andreev, N.; Barzi, E.; Bossert, R.; January 2005; 8 pp.; In English
Report No.(s): DE2005-15017093; FERMILAB-CONF-05-166-TD; No Copyright; Avail.: National Technical Information
Service (NTIS)
Four nearly identical Nb3Sn dipole models of the same design were built and tested at Fermilab. It provided a unique
opportunity of systematic study the field quality effects in Nb3Sn accelerator magnets. The results of these studies are reported
in the paper.
NTIS
Magnets; Superconductors (Materials)
197