Proposal of a beam study in the AGS Booster

Technical Report · Tue Oct 01 00:00:00 EDT 1991

DOI:https://doi.org/10.2172/6147994· OSTI ID:6147994

Machida, S; Chen, S

IN order to achieve the design luminosity, the Superconducting Super Collider (SSC) parameter choices emphasize the preservation of the transverse emittance requiring in the collider a normalized transverse emittance of 1 {pi}.mm.mrad. A stringent accelerator chain emittance budget must be maintained to achieve the final value. Budgeted emittance specifications for the Low Energy Booster (LEB) include 0.4 {pi}.mm.mrad at injection and {le} 0.6 {pi}.mm.mrad at extraction. The space-charge tune shift is expected to be more than 0.5 when the rms normalized emittance of 0.4 {pi}.mm.mrad at injection and the total number of particles is 1.1 {times} 10{sup 12} with 1 {times} 10{sup 10} particles per bunch. Therefore, it is necessary to cope with a large tune shift and avoid emittance deterioration. We have been studying the beam emittance evolution in the LEB by a multi-particle simulation code with space-charge effects. As reported in the several papers we have obtained from the simulation some new insights into the effects which seem to explain qualitatively a cause of the emittance growth. Even quantitatively, we believe that the simulation can predict the emittance growth as a function of time quite accurately because the code includes most details of the physics processes, such as the adiabatic bunching process and acceleration in the fully 6-D phase space treatment, transverse as well as longitudinal space-charge calculations in a self-consistent manner, and intensity decrease due to particle loss. The purpose of this study is to determine quantitatively the emittance deterioration due to space-charge effects, not to find the maximum current an accelerator could accommodate. Since the charge distribution itself may not remain the same, an accurate measurement of the beam profile is an essential factor of the beam study.

• Research Organization: Superconducting Super Collider Lab., Dallas, TX (United States)
• Sponsoring Organization: USDOE; USDOE, Washington, DC (United States)
• DOE Contract Number: AC35-89ER40486
• OSTI ID: 6147994
• Report Number(s): SSCL-556; ON: DE92003600
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
PARTICLE BOOSTERS
BEAM EMITTANCE
SUPERCONDUCTING SUPER COLLIDER
BEAM BUNCHING
BROOKHAVEN AGS
PHASE SPACE
SIMULATION
SPACE CHARGE
TUNING
ACCELERATORS
BEAM DYNAMICS
CYCLIC ACCELERATORS
MATHEMATICAL SPACE
SPACE
STORAGE RINGS
SYNCHROTRONS
430200* - Particle Accelerators- Beam Dynamics
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