Fermilab electron cooling project: field measurements in the cooling section solenoid (original) (raw)
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Toward a Cold Electron Beam in the Fermilab Electron Cooler
AIP Conference Proceedings, 2004
Fermilab is developing a high-energy electron cooling system to cool 8.9-GeV/c antiprotons in the Recycler ring [1]. Cooling of antiprotons requires a round electron beam with a small angular spread propagating through 20-m long cooling section with a kinetic energy of 4.3 MeV. To confine the electron beam tightly and to keep its transverse angles below 0.1 mrad, the cooling section will be immersed into a solenoidal field of 50-150G. This paper describes the technique of measuring and adjusting the magnetic field quality in the cooling section and presents preliminary results of beam quality measurements in the cooler prototype.
Performance of the Fermilab's 4.3 MeV electron cooler
2006
A 4.3 MeV DC electron beam is used to cool longitudinally an antiproton beam in the Fermilab's Recycler ring. Cooling capabilities of the electron beam are characterized by the drag rate that was measured at various conditions. Fitting the results with a formula for non-magnetized cooling gives electron parameters that agree within a factor of 2 with independently measured electron
Test of a full-scale prototype of the Fermilab electron cooler
The Fermilab's Recycler ring will employ an electron cooler to store and cool 8.9 GeV antiprotons [1]. The cooler is based on an electrostatic accelerator, Pelletron, working in an energy-recovery, or "recirculation", regime. A full-scale prototype of the cooler has been assembled and commissioned in a separate building. The main goal of the experiments with the prototype is to demonstrate a stable operation with a 3.5 MeV, 0.5 A DC electron beam while preserving a high beam quality in the cooling section. The paper describes the current status of the work and preliminary experimental results.
Performance of Fermilab's 4.3 MeV Electron Cooler
This conference, 2006
A 4.3 MeV DC electron beam is used to cool longitudinally an antiproton beam in the Fermilab's Recycler ring. Cooling capabilities of the electron beam are characterized by the drag rate that was measured at various conditions. Fitting the results with a formula for ...
Magnetic System of Electron Cooler for Cosy
2011
BINP SB RAS, Novosibirsk. Abstract The magnetic system for the COSY cooler is presented. Electron beam energy range is wide (24keV2MeV), typical bend’s radii of electrons track are near to 1 m, typical magnetic fields are 0.5 – 2kG. Transport channels with guiding magnetic fields for motion of electrons from high voltage terminal of cascade transformer into cooling section and their return for recuperation under such conditions are discussed. Results of Hall sensors measurements are compared with corresponding computations. Also some steps were taken for improvement of the magnetic field lines straightness in the cooling section.
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.
Fermilab electron cooling project: commissioning of the 5 MeV recirculation test set-up
PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268), 2001
An important part of the Fermilab's Recycler Electron Cooling (REC) project [1] is a recirculation test which is performed using a 5-MV electrostatic accelerator, a Pelletron, with two tubes and a simplified beam line with one 180-degree bend. The main goal of the test is to demonstrate stable operation of a 4.4-MeV, 0.5-A DC electron beam. The paper describes the set-up and the early experimental results.
Commissioning of the Fermilab electron cooler prototype beam line
2003
A prototype of a 4.3-MeV electron cooling system is being assembled at Fermilab as part of the ongoing R&D program in high energy electron cooling. This electron cooler prototype will not demonstrate the actual cooling but it will allow determining if the electron beam properties are suitable for antiproton beam cooling. An electron beam is accelerated by a 5-MV Pelletron (Van de Graaff type) accelerator and transported to a prototype cooling section. The cooling will take place in a 20-m long solenoid flanked on both sides by a delivery and return beam-line -a total of 60 meters of transport channel.
Proceedings of the Twentieth International Cryogenic Engineering Conference (ICEC20), 2005
Progress is reviewed, in the development of various semiconductor sensors for measurement of temperature and magnetic field that are intended for use in cryogenic engineering and low-temperature physics, which have been developed in an international collaboration supported by the European Union. A range of resistance thermometers based on both bulk and film of Ge and SiC has been developed, to provide high sensitivity over complementary temperature ranges, within the overall range 0,03 to 500 K. New types of Si and GaAs diode temperature sensor have also been produced. A novel multisensor for concurrent measurements of temperature and magnetic fields has been designed, which consists of a Ge-film resistance thermometer and a InSb-film Hall generator.