IPAC2015 - List of Authors (Bhat, C.M.)

Paper	Title	Page
THPF112	A New Beam Injection Scheme for the Fermilab Booster	3976
	C.M. Bhat Fermilab, Batavia, Illinois, USA
	Funding: Operated by Fermi Research Alliance, LLC under Contract No. DE-AC02-07CH11359 with the United States Department of Energy Here we present an improved beam injection scheme for the Fermilab Booster. The beam is injected on the deceleration part of the standard sinusoidal magnetic ramp and beam capture takes place almost immediately after the injection process, before the beam is fully de-bunched. During the entire capture process we impose in a changing field with changing from negative to zero to positive values. Our simulations clearly showed that this method of beam capture is more efficient to preserve longitudinal beam emittance at the early part of the acceleration cycle and helps to keep the required rf voltage to an optimal value of 15% lower than the current operational values. As a result of the reduced emittance growth at the early part of the Booster cycle we observe reduced required rf power on a typical Booster cycle by ~30%, which is quite important from the point of rf power requirements during the Booster operation. Further, we investigate snap bunch rotation at extraction to provide beam with lower to the MI/RR to improve the proton beam slip-stacking efficiency.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-THPF112
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THPF113	Energy Spread of the Proton Beam in the Fermilab Booster at Its Injection Energy	3979
	C.M. Bhat, B.E. Chase, S. Chaurize, F.G. Garcia, W. Pellico, K. Seiya, T. Sullivan, A.K. Triplett Fermilab, Batavia, Illinois, USA
	Funding: Operated by Fermi Research Alliance, LLC under Contract No. DE-AC02-07CH11359 with the United States Department of Energy We have measured the total energy spread (99% energy spread) of the Booster beam at its injection energy of 400 MeV by three different methods - 1) creating a notch of about 40 nsec wide in the beam immediately after multiple turn injection and measuring the slippage time required for high and low momentum particles for a grazing touch in line-charge distribution, 2) injecting partial turn beam and letting it to debunch, and 3) comparing the beam profile monitor data with predictions from MAD simulations for the 400 MeV injection beam line. The measurements are repeated under varieties of conditions of RF systems in the ring and in the beam transfer line.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-THPF113
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THPF131	Beam Studies for the Proton Improvement Plan (PIP) - Reducing Beam Loss at the Fermilab Booster	4027
	K. Seiya, C.M. Bhat, D.E. Johnson, V.V. Kapin, W. Pellico, C.-Y. Tan, R. Tesarek Fermilab, Batavia, Illinois, USA
	The Fermilab Booster is being upgraded under the Proton Improvement Plan (PIP) to be capable of providing a proton flux of 2.25·10¹⁷ protons per hour. The intensity per cycle will remain at the present operational 4.3·10¹² protons per pulse, however the Booster beam cycle rate is going to be increased from 7.5 Hz to 15 Hz. One of the biggest challenges is to maintain the present beam loss power while the doubling the beam flux. Under PIP, there has been a large effort in beam studies and simulations to better understand the mechanisms of the beam loss. The goal is to reduce it by half by correcting and controlling the beam dynamics and by improving operational systems through hardware upgrades. This paper is going to present the recent beam study results and status of the Booster operations.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-THPF131
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Paper

Title

Page

A New Beam Injection Scheme for the Fermilab Booster

3976

C.M. Bhat
Fermilab, Batavia, Illinois, USA

Funding: Operated by Fermi Research Alliance, LLC under Contract No. DE-AC02-07CH11359 with the United States Department of Energy
Here we present an improved beam injection scheme for the Fermilab Booster. The beam is injected on the deceleration part of the standard sinusoidal magnetic ramp and beam capture takes place almost immediately after the injection process, before the beam is fully de-bunched. During the entire capture process we impose in a changing field with changing from negative to zero to positive values. Our simulations clearly showed that this method of beam capture is more efficient to preserve longitudinal beam emittance at the early part of the acceleration cycle and helps to keep the required rf voltage to an optimal value of 15% lower than the current operational values. As a result of the reduced emittance growth at the early part of the Booster cycle we observe reduced required rf power on a typical Booster cycle by ~30%, which is quite important from the point of rf power requirements during the Booster operation. Further, we investigate snap bunch rotation at extraction to provide beam with lower to the MI/RR to improve the proton beam slip-stacking efficiency.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-THPF112

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

THPF113

Energy Spread of the Proton Beam in the Fermilab Booster at Its Injection Energy

3979

C.M. Bhat, B.E. Chase, S. Chaurize, F.G. Garcia, W. Pellico, K. Seiya, T. Sullivan, A.K. Triplett
Fermilab, Batavia, Illinois, USA

Funding: Operated by Fermi Research Alliance, LLC under Contract No. DE-AC02-07CH11359 with the United States Department of Energy
We have measured the total energy spread (99% energy spread) of the Booster beam at its injection energy of 400 MeV by three different methods - 1) creating a notch of about 40 nsec wide in the beam immediately after multiple turn injection and measuring the slippage time required for high and low momentum particles for a grazing touch in line-charge distribution, 2) injecting partial turn beam and letting it to debunch, and 3) comparing the beam profile monitor data with predictions from MAD simulations for the 400 MeV injection beam line. The measurements are repeated under varieties of conditions of RF systems in the ring and in the beam transfer line.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-THPF113

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

THPF131

Beam Studies for the Proton Improvement Plan (PIP) - Reducing Beam Loss at the Fermilab Booster

4027

K. Seiya, C.M. Bhat, D.E. Johnson, V.V. Kapin, W. Pellico, C.-Y. Tan, R. Tesarek
Fermilab, Batavia, Illinois, USA

The Fermilab Booster is being upgraded under the Proton Improvement Plan (PIP) to be capable of providing a proton flux of 2.25·10¹⁷ protons per hour. The intensity per cycle will remain at the present operational 4.3·10¹² protons per pulse, however the Booster beam cycle rate is going to be increased from 7.5 Hz to 15 Hz. One of the biggest challenges is to maintain the present beam loss power while the doubling the beam flux. Under PIP, there has been a large effort in beam studies and simulations to better understand the mechanisms of the beam loss. The goal is to reduce it by half by correcting and controlling the beam dynamics and by improving operational systems through hardware upgrades. This paper is going to present the recent beam study results and status of the Booster operations.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-THPF131

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