PAC09 - List of Authors (McCarron, D.O.)

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McCarron, D.O.

Paper	Title	Page
FR5RFP069	Intensity Dependent Beam Dynamics Studies in the Fermilab Booster	4692
	L.K. Spentzouris Illinois Institute of Technology, Chicago, Illinois D.O. McCarron IIT, Chicago, Illinois W. Pellico, P. Spentzouris, E.G. Stern, R.E. Tomlin Fermilab, Batavia
	Funding: This work supported by NSF grant No. 0237162, and DOE SCIentific Discovery through Advanced Computing: Accelerator science and simulation DE-PS02-07ER07-09 The FNAL Booster is a combined-function proton synchrotron with a bunch intensity of ~6·10¹⁰ protons; significantly greater than expected in the original design. The injection energy is 400 MeV (gamma factor 1.4), low enough for space charge forces to play a role in beam dynamics. The magnets are used directly as vacuum tanks, so the laminated pole surfaces contribute significantly to impedance. A study of the transverse coupling dependence on beam intensity is presented here. Experimental results are being analyzed using Synergia, a high-fidelity, parallel, fully 3D modeling code that includes both space charge and impedance dynamics. Previously, Synergia has always shown good agreement with experimental data. Our initial studies show that the direct space charge contribution to beam dynamics is too small to account for the increase in the coupling seen experimentally, corroborating analytic results. Parametric studies of the impedance needed to match the measured coupling are being done. Agreement between simulation and experiment should provide an independent measure of the Booster impedance, which has been analytically modeled and calculated elsewhere.

Paper

Title

Page

FR5RFP069

Intensity Dependent Beam Dynamics Studies in the Fermilab Booster

4692

L.K. Spentzouris
Illinois Institute of Technology, Chicago, Illinois
D.O. McCarron
IIT, Chicago, Illinois
W. Pellico, P. Spentzouris, E.G. Stern, R.E. Tomlin
Fermilab, Batavia

Funding: This work supported by NSF grant No. 0237162, and DOE SCIentific Discovery through Advanced Computing: Accelerator science and simulation DE-PS02-07ER07-09

The FNAL Booster is a combined-function proton synchrotron with a bunch intensity of ~6·10¹⁰ protons; significantly greater than expected in the original design. The injection energy is 400 MeV (gamma factor 1.4), low enough for space charge forces to play a role in beam dynamics. The magnets are used directly as vacuum tanks, so the laminated pole surfaces contribute significantly to impedance. A study of the transverse coupling dependence on beam intensity is presented here. Experimental results are being analyzed using Synergia, a high-fidelity, parallel, fully 3D modeling code that includes both space charge and impedance dynamics. Previously, Synergia has always shown good agreement with experimental data. Our initial studies show that the direct space charge contribution to beam dynamics is too small to account for the increase in the coupling seen experimentally, corroborating analytic results. Parametric studies of the impedance needed to match the measured coupling are being done. Agreement between simulation and experiment should provide an independent measure of the Booster impedance, which has been analytically modeled and calculated elsewhere.