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BBAT: Bunch and bucket analysis tool

Description: BBAT is written to meet the need of an interactive graphical tool to explore the longitudinal phase space. It is driven for testing new ideas or new tricks quickly. It is especially suitable for machine physicists or operation staff as well both in the control room during machine studies or off-line to analyze the data. The heart of the package contains a set of c-routines to do the number crunching. The graphics part is wired with scripting language tcl/tk and BLT. The c-routines are general enough that one can write new applications such as animation of the bucket as a machine parameter varies via a sliding scale. BBAT deals with single rf system. For double rf system, one can use Dr. BBAT, which stands for Double rf Bunch and Bucket Analysis Tool. One usage of Dr. BBAT is to visualize the process of bunch coalescing and flat bunch creation.
Date: May 1, 1995
Creator: Deng, D.P.
Partner: UNT Libraries Government Documents Department

Rebucketing after transition in RHIC

Description: Rebucketing in the Relativistic Heavy Ion Collider, RHIC, describes the process of moving the beam from the 26MHz accelerating system to the 196MHz storage system with as little beam loss as possible. This puts a stringent requirement on the beam longitudinal area done at top energy. The ample bucket space after, but not too close to, transition is explored by computer simulation to relax such stringent conditions.
Date: May 1, 1995
Creator: Deng, D.P. & Peggs, S.
Partner: UNT Libraries Government Documents Department

Rf systems for RHIC

Description: The RHIC rf systems must capture the injected beam, accelerate it through transition to top energy, shorten the bunches prior to rebucketing, and store the beam for 10 hours in the presence of strong intra-beam scattering. These different functions are met by three independent systems. An accelerating system at 26.7 Mhz (h = 342), a storage system at 196.1 MHz (h = 2508), and a wideband system for the damping of injection efforts.
Date: May 1, 1995
Creator: Rose, J.; Brodowski, J.; Connolly, R.; Deng, D.P.; Kwiatkowski, S.; Pirkl, W. et al.
Partner: UNT Libraries Government Documents Department

Design of the 26.7 MHz rf cavity for RHIC

Description: The accelerating system for RHIC operates at 26.7 MHz (h = 342) and must capture the injected beam, accelerate it to top energy, and shorten the bunches prior to rebucketing into the storage (h = 2508) system. These different functions set the design parameters of the cavity. The frequency of 26.7 MHz has been chosen in order to provide large enough buckets to capture the injected beam from the AGS and a large linear region for debunching during a bunch rotation at top energy. Provision of the large linear region also dictates the voltage requirement of 400 kV per cavity. The cavity must be tuned {approximately}90 kHz to compensate for the change in speed of the gold beam.
Date: May 1, 1995
Creator: Rose, J.; Brodowski, J.; Deng, D.P.; Kwiatkowski, S.; Pirkl, W. & Ratti, A.
Partner: UNT Libraries Government Documents Department

Physics of the AGS-to-RHIC transfer line commissioning

Description: This paper presents beam physics results from the fall 1995 AGS-to- RHIC (ATR) transfer line commissioning run with fully ionized gold nuclei. We first describe beam position monitors and transverse video profile monitors, instrumentation relevant to measurements performed during this commissioning. Measured and corrected beam trajectories demonstrate agreement with design optics to a few percent, including optical transfer functions and beamline dispersion. Digitized 2- dimensional video profile monitors were used to measure beam emittance, and beamline optics and AGS gold ion beam parameters are shown to be comparable to RHIC design requirements.
Date: July 1, 1996
Creator: Satogata, T.; Ahrens, L.; Brennan, M.; Brown, K.; Clifford, T.; Connolly, R. et al.
Partner: UNT Libraries Government Documents Department