Fermilab, Batavia, Illinois, USA
Fermilab, Batavia, Illinois, USA
Brown University, Providence, USA
Abstract: We have developed a computer program interfaced with the ACNET environment for Fermilab accelerators to measure energy spread of the proton beam from the LINAC at an injection kinetic energy of 400 MeV. It uses a digitizing oscilloscope and provides the user the ability to configure scope settings for optimal data acquisition from a resistive wall monitor. When the program is launched, it secures complete control of the scope. Subsequently, a special “one-shot” timeline is generated to initiate the beam injection into the Booster. After the completion of the beam injection from the LINAC, a gap of about 40 ns is produced in the Booster beam using a set of kickers and line-charge distribution data is collected for next 200 μs. The program then analyzes the data to extract the gap width, beam revolution period and beam energy spread. We illustrate a case with an example. We also present results on beam energy spread as a function of beam intensity from a recent measurement.
Author would like to thank S. Chaurize, C. Drennan, W. Pellico, K. Seiya, T. Sullivan and K. Triplett
Fermilab, Batavia, Illinois, USA
The Fermiab Booster accelerates beam from 400 MeV to 8 GeV at 15 Hz. In the PIP (Proton Improvement Plan) era, it is required that Booster deliver 4.2·1012 protons per pulse to extraction. One of the obstacles for providing quality beam to the users is the longitudinal quadrupole oscillation that the beam suffers from right after transition. Although this oscillation is well taken care of with quadrupole dampers, it is important to understand the source of these oscillation in light of the PIP II requirements that require 6.5·1012 protons per pulse at extraction. This paper explores the results from computer simulations, machine studies and solutions to prevent the quadrupole oscillation after transition.
Author would like to thank S. Chaurize, C. Drennan, W. Pellico, K. Seiya, T. Sullivan and K. Triplett
Fermilab, Batavia, Illinois, USA
Fermilab is committed to upgrade its accelerator complex towards the intensity frontier by making a substantial increase in the average beam power delivered to the neutrino and muon programs pursuing HEP research in the lepton sector. Proton Improvement Plan (PIP) enables us to provide 700 kW beam power by the end of this year. By the middle of next decade, the foreseen PIP–II replaces the existing LINAC, a 400 MeV injector to the Booster, by an 800 MeV superconducting LINAC with beam power increased by >50%. In any case, the Fermilab Booster, an 8 GeV injector to the MI, is going to play a very significant role for the next two decades. In this context, we have recently developed an innovative beam injection scheme for the Booster called "early injection scheme" and put into operation. This novel scheme has a potential to increase the Booster beam intensity from the PIP design goal by ~40%. Some benefits of the scheme have already been seen so far. In this talk, I will present, principle of the scheme, results from beam experiments, current status and future plans for the early beam injection scheme. This scheme fits well with the current and future programs at Fermilab.
Author would like to thank S. Chaurize, C. Drennan, F. Garcia, B. Hendrick, W. Pellico, K. Seiya, T. Sullivan, K. Triplett and A. Waller,
