NASA Scientific and Technical Aerospace Reports

Recently In-Phase and Quadrature (I&Q) was added to both the 53 MHz Feedback and Feedforward Beam Loading
Compensation for Slip Stacking in the Fermilab Main Injector. With 53 MHz Feedback, we can now turn the 18 Radio
Frequency (RF) Stations off down to below 100 V. In using I&Q on Feedforward, beam loading compensation to the beam
on both the upper and lower frequencies of Slip Stacking can be applied as we slip the beam. I&Q theory will be discussed.
NTIS
Injectors; Feedforward Control; Radio Frequencies
20060002058 Fermi National Accelerator Lab., Batavia, IL, USA
Monte Carlo of Tevatron Operations, Including the Recycler
McCrory, E.; January 2005; 8 pp.; In English
Report No.(s): DE2005-15017070; FERMILAB-CONF-05-190-AD; No Copyright; Avail.: National Technical Information
Service (NTIS)
A Monte Carlo model depicting the operation of the Fermilab Tevatron Complex has been constructed. The purpose is
to replicate the general behavior of the Complex, incorporating aspects that are known to affect its performance, in order to
learn how optimally to run the Complex. The newest ring at Fermilab, the Recycler, has been added to the model in order to
understand how best to incorporate it into the rest of the Complex. This model includes numerous parameterizations of the
Complex, including reasonable random fluctuations and normal interruptions in operation of each accelerator due to
downtime. Optimizations are performed to guide us in making using the model in order to maximize the integrated luminosity
delivered to the experiments.
NTIS
Monte Carlo Method; Particle Accelerators
20060002059 Fermi National Accelerator Lab., Batavia, IL, USA
Tevatron Beam Lifetimes at Injection Using the Shot Data Analysis System
Xiao, A.; Bolshakov, T.; Lebrun, P.; McCrory, E.; Papadimitriou, V.; January 2005; 8 pp.; In English
Report No.(s): DE2005-15017067; FERMILAB-CONF-05-155-AD; No Copyright; Avail.: National Technical Information
Service (NTIS)
The purpose of the Shot Data Acquisition and Analysis (SDA) system is to provide summary data on the Fermilab RunII
accelerator complex and provide related software for detailed analyses. In this paper, we discuss such a specific analysis on
Tevatron beam lifetimes at injection. These results are based on SDA data, tools and methodology. Beam lifetime is one of
our most important diagnostics. An analysis of it can give information on intra beam scattering, aperture limitations,
instabilities and most importantly beam-beam effects. Such an analysis gives us a better understanding of our machine, and
will lead to an improved performance in the future.
NTIS
Beam Injection; Data Acquisition; Data Processing; Particle Accelerators
20060002060 Fermi National Accelerator Lab., Batavia, IL, USA
Characterizing Luminosity Evolution in the Tevatron
Shiltsev, V.; McCrory, E.; January 2004; 6 pp.; In English
Report No.(s): DE2005-15017073; FERMILAB-CONF-05-191; No Copyright; Avail.: Department of Energy Information
Bridge
We derive an approximate form of a luminosity evolution in a high intensity hadron collider taking into account the most
important phenomena of intrabeam scattering (IBS), beam burn-up due to luminosity and beam-beam effects. It is well known
that an exponential decay does not describe luminosity evolution very well unless the lifetime is allowed to vary with time.
However, a ‘1/time’ evolution, which this derivation shows is a good approximation, fits data from the Tevatron well.
NTIS
Luminosity; Particle Accelerators
20060002061 Fermi National Accelerator Lab., Batavia, IL, USA
Multipole Error Analysis Using Local 3-Bump Orbit Data in Fermilab Recycler
Yang, M. J.; Xiao, M.; January 2005; 8 pp.; In English
Report No.(s): DE2005-15017068; FERMILAB-CONF-05-181-AD; No Copyright; Avail.: National Technical Information
Service (NTIS)
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