Electron-cooling scenarios at Fermilab (original) (raw)
Related papers
Status of antiproton accumulation and cooling at Fermilab's Recycler
The Recycler ring is an 8 GeV permanent magnet storage ring where antiprotons are accumulated and prepared for Fermilab's Tevatron Collider program. With the goal of maximizing the integrated luminosity delivered to the experiments, storing, cooling and extracting antiprotons with high efficiency has been pursued. Over the past two years, while the average accumulation rate doubled, the Recycler continued to operate at a constant level of performance thanks to changes made to the Recycler Electron Cooler (energy stability and regulation, electron beam optics), RF manipulations and operating procedures. In particular, we discuss the current accumulation cycle in which ~400×10 10 antiprotons are accumulated and extracted to the Tevatron every ~15 hours.
2020
Electron cooling of 8 GeV antiprotons at Fermilab's Recycler storage ring is now routinely used in the collider operation. It requires a 0.1-0.5 A, 4.3 MeV dc electron beam and is designed to increase the longitudinal phasespace density of the circulating antiproton beam. This paper briefly describes the characteristics of the electron beam that were achieved to successfully cool antiprotons. Then, results from various cooling force measurements along with comparison to a nonmagnetized model are presented. Finally, operational aspects of the implementation of electron cooling at the Recycler are discussed, such as adjustments to the cooling rate and the influence of the electron beam on the antiproton beam lifetime.
Antiproton cooling in the Fermilab Recycler Ring
2005
The 8.9-GeV/c Recycler antiproton storage ring is equipped with both stochastic and electron cooling systems. These cooling systems are designed to assist accumulation of antiprotons for the Tevatron collider operations. In this paper we report on an experimental demonstration of electron cooling of high-energy antiprotons. At the time of writing this report, the Recycler electron cooling system is routinely used
Design of antiproton electron cooling in the recycler
Proceedings of the 1999 Particle Accelerator Conference (Cat. No.99CH36366), 1999
A conceptual design of electron cooling of 9 GeV antiprotons for the Tevatron is discussed. Analytic and numeric calculations of the cooling process determine the basic requirements of the cooler.
Electron cooling of 8GeV antiprotons at Fermilab's Recycler: Results and operational implications
2006
Electron cooling of 8 GeV antiprotons at Fermilab's Recycler storage ring is now routinely used in the collider operation. It requires a 0.1-0.5 A, 4.3 MeV dc electron beam and is designed to increase the longitudinal phase-space density of the circulating antiproton beam. This paper briefly describes the characteristics of the electron beam that were achieved to successfully cool antiprotons.
Status of high energy electron cooling in FNAL's Recycler Ring
Proc. of the XXth …, 2006
Electron cooling of 8 GeV antiprotons at Fermilab's Recycler storage ring is now routinely used in the collider operation. It requires a 0.1-0.5 A, 4.3 MeV DC electron beam to increase the longitudinal phase-space density of the circulating antiproton beam. This paper discusses the latest status of the electron cooler and its mode of operation within the context of Fermilab's accelerator complex. In addition, we will show preliminary results that demonstrate electron cooling of the transverse phasespace of the antiproton beam.
BPM System for Electron Cooling in the Fermilab Recycler Ring
AIP Conference Proceedings, 2004
We report a VXI based system used to acquire and process BPM data for the electron cooling system in the Fermilab Recycler ring. The BPM system supports acquisition of data from 19 BPM locations in five different sections of the electron cooling apparatus. Beam positions for both electrons and anti-protons can be detected simultaneously with a resolution of ±50 µm. We calibrate the system independently for each beam type at each BPM location. We describe the system components, signal processing and modes of operation used in support of the electroncooling project and present experimental results of system performance for the developmental electron cooling installation at Fermilab.
Commissioning of Fermilab's Electron Cooling System for 8-GeV Antiprotons
Proceedings of the 2005 Particle Accelerator Conference, 2005
A 4.3-MeV electron cooling system has been installed at Fermilab in the Recycler antiproton storage ring and is currently being commissioned. The cooling system is designed to assist accumulation of 8.9-GeV/c antiprotons for the Tevatron collider operations. This paper reports on the progress of the electron beam commissioning effort as well as on detailed plans of demonstrating the cooling of antiprotons.
Status of the Fermilab electron cooling project
Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment, 2004
The first stage of the Fermilab Electron Cooling R&D program is now complete: technology necessary to generate hundreds of milliamps of electron beam current at MeV energies has been demonstrated. Conceptual design studies show that with an electron beam current of 200 mA and with a cooling section of 20 m electron cooling in the Fermilab Recycler ring can provide antiproton stacking rates suitable for the Tevatron upgrades beyond Run II luminosity goals. A prototype of such an electron cooling system is now being built at Fermilab as part of the continuing R&D program. This paper describes the electron cooling system design as well as the status of the Fermilab electron cooling R&D program.
Antiproton Production and Cooling at the Tevatron
2000
Plans to upgrade the Fermilab Antiproton Source in preparation for Main Injector running are currently being implemented. A permanent magnet storage ring has been proposed to expand Fermilab's™p storage capacity while adding the ability to recover stored Tevatron™p's. A beam sweeping system is under development to sweep the beam as it strikes the production target to insure that the target