Possible Lower Limit to Linac Emittance

Emittance Reduction between EBIS LINAC and Booster by Electron Beam Cooling; Is Single Pass Cooling Possible?

Longitudinal Emittance Oscillation in a Superconducting Drift Tube Linac

In drift tube linacs a beam energy spread results from the finite beam size. Radial variation of the axial accelerating field induces a beam energy spread, which, in general, will accumulate as the beam passes through successive drift tubes. This paper shows that under some conditions of periodic transverse focusing and longitudinal phase focusing, the correlation between the longitudinal and t...

Observation and Control of Emittance Growth in the Slc Linac*

To produce high luminosity at a linear collider, the impinging beams must be focused to extremely small spots, thus requiring low beam emittances. At the SLAC Linear Collider (SLC), low emittance beams are provided by the damping rings, then accelerated in the linac. The linac cannot be allowed to cause significant emittance growth. We describe here the observed emittance of the beam at its lau...

Beam Emittance Studies at the Heavy Ion Linac UNILAC

New accelerating structures for the UNILAC at GSI were commissioned in the last two years [1, 2], and further machine upgrades are in preparation in order to meet the requirements for FAIR [3, 4]. Beam emittance is one of the key beam parameters that are essential for any beam dynamics calculation, for the design of new accelerators as well as verification or investigation of existing machines....

Review of Profile and Emittance Diagnostics for the SNS Linac

This report is a companion to the presentation given at the CARE workshop entitled “ABI Workshop on Transverse and Longitudinal Emittance Measurement in Hadron Accelerators”. The workshop was held in Bad Kreznach from 10 to 12 December, 2008. An overview of the SNS facility is presented, followed by a historical review of several profile and emittance diagnostics. The systems presented here rep...