IPAC2016 - List of Authors (Bhat, C.M.)

Paper	Title	Page
MOPOY013	Modeling Longitudinal Dynamics in the Fermilab Booster Synchrotron	873
	J.-F. Ostiguy, C.M. Bhat, V.A. Lebedev Fermilab, Batavia, Illinois, USA
	Funding: Work performed under U.S. Government contract DE-AC02-07CH11359 The PIP-II project will replace the existing 400 MeV linac with a new, CW-capable, 800 MeV superconducting one. With respect to current operations, a 50% increase in beam intensity in the rapid cycling Booster synchrotron is expected. Booster batches are combined in the Recycler ring; this process limits the allowed longitudinal emittance of the extracted Booster beam. To suppress eddy currents, the Booster has no beam pipe; magnets are evacuated, exposing the beam to core laminations and this has a substantial impact on the longitudinal impedance. Noticeable longitudinal emittance growth is already observed at transition crossing. Operation at higher intensity will likely necessitate mitigation measures. We describe systematic efforts to construct a predictive model for current operating conditions. A longitudinal only code including a laminated wall impedance model, space charge effects, and feedback loops is developed. Parameter validation is performed using detailed measurements of relevant beam, rf and control parameters. An attempt is made to benchmark the code at operationally favorable machine settings.
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-MOPOY013
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Paper

Title

Page

Modeling Longitudinal Dynamics in the Fermilab Booster Synchrotron

873

J.-F. Ostiguy, C.M. Bhat, V.A. Lebedev
Fermilab, Batavia, Illinois, USA

Funding: Work performed under U.S. Government contract DE-AC02-07CH11359
The PIP-II project will replace the existing 400 MeV linac with a new, CW-capable, 800 MeV superconducting one. With respect to current operations, a 50% increase in beam intensity in the rapid cycling Booster synchrotron is expected. Booster batches are combined in the Recycler ring; this process limits the allowed longitudinal emittance of the extracted Booster beam. To suppress eddy currents, the Booster has no beam pipe; magnets are evacuated, exposing the beam to core laminations and this has a substantial impact on the longitudinal impedance. Noticeable longitudinal emittance growth is already observed at transition crossing. Operation at higher intensity will likely necessitate mitigation measures. We describe systematic efforts to construct a predictive model for current operating conditions. A longitudinal only code including a laminated wall impedance model, space charge effects, and feedback loops is developed. Parameter validation is performed using detailed measurements of relevant beam, rf and control parameters. An attempt is made to benchmark the code at operationally favorable machine settings.

DOI •

reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-MOPOY013

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)