P. Adderley
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View article: The Continuous Electron Beam Accelerator Facility at 12 GeV
The Continuous Electron Beam Accelerator Facility at 12 GeV Open
This review paper describes the energy-upgraded Continuous Electron Beam Accelerator Facility (CEBAF) accelerator. This superconducting linac has achieved 12 GeV beam energy by adding 11 new high-performance cryomodules containing 88 super…
Generation and characterization of magnetized electron beam from a DC high voltage photogun for electron beam cooling application Open
One of the most challenging requirements for the proposed Electron-Ion Collider is the strong cooling of the proton beam, which is key to achieving the collider’s desired luminosity of order 1033-1034 cm-2 s-1. Magnetized bunched-beam elec…
High-Gradient Wien Spin Rotators at Jefferson Lab Open
Nuclear physics experiments performed in the Continuous Electron Beam Accelerator Facility (CEBAF) at Jefferson Laboratory (JLab) require spin manipulation of electron beams. Two Wien spin rotators in the injector keV region are essential …
High-Gradient Wien Spin Rotators at Jefferson Lab Open
Nuclear physics experiments performed in the Contin-uous Electron Beam Accelerator Facility (CEBAF) at Jefferson Laboratory (JLab) require spin manipulation of electron beams. Two Wien spin rotators in the injector keV region are essential…
Inverted Geometry Ceramic Insulators in High Voltage DC Electron Guns for Accelerators Open
A direct current (dc) high voltage photo-emission electron gun operating at 130 kV is utilized at the Jefferson Lab (JLab) Continuous Electron Beam Accelerator Facility to generate spin-polarized electrons for nuclear physics experiments. …
High Voltage Design and Evaluation of Wien Filters for the CEBAF 200 keV Injector Upgrade Open
High-energy nuclear physics experiments at the Jefferson Lab Continuous Electron Beam Accelerator Facility (CEBAF) require highly spin-polarization electron beams, produced from strained super-lattice GaAs photocathodes, activated to negat…
High Current High Charge Magnetized and Bunched Electron Beam from a DC Photogun for JLEIC Cooler Open
A high current, high charge magnetized electron beamline that has been under development for fast and efficient cooling of ion beams for the proposed Jefferson Lab Electron Ion Collider (JLEIC). In this paper, we present the latest progres…
Magnetized Electron Source for JLEIC Cooler Open
Magnetized bunched-beam electron cooling is a critical part of the Jefferson Lab Electron Ion Collider (JLEIC). Strong cooling of ion beams will be accomplished inside a cooling solenoid where the ions co-propagate with an electron beam ge…
Magnetized electron beam for the JLEIC re-circulator cooler ring Open
The ion beams of the proposed Jefferson Lab Electron Ion Collider (JLEIC) must be cooled to achieve the required collision luminosity. In general, cooling is accomplished when an electron beam co-propagates with an ion beam moving at the s…
Milliampere Beam Studies using High Polarization Photocathodes at the CEBAF Photoinjector Open
Extending the charge lifetime of today's spin polarized GaAs photoelectron guns from tens to thousands of Coulombs is a requirement for long-duration operation at milliampere beam current. There are two main approaches frequently considere…
Nonevaporable getter coating chambers for extreme high vacuum Open
Techniques for nonevaporable getter (NEG) coating a large diameter chamber are presented along with vacuum measurements in the chamber using several pumping configurations, with base pressure as low as 1.56 × 10−12 Torr (N2 equivalent) wit…
Production of Magnetized Electron Beam from a DC High Voltage Photogun Open
Bunched-beam electron cooling is a key feature of all proposed designs of the future electron-ion collider, and a requirement for achieving the highest promised collision luminosity. At the Jefferson Lab Electron Ion Collider (JLEIC), fast…
High current polarized electron source Open
Jefferson Lab operates two DC high voltage GaAs photoguns with compact inverted insulators. One photogun provides the polarized electron beam at the Continuous Electron Beam Accelerator Facility (CEBAF) up to 200 µA. The other gun is used …
300 kV DC High Voltage Photogun with Inverted Insulator Geometry and CsK2sb Photocathode Open
A compact DC high voltage photogun with inverted-insulator geometry was designed, built and operated reliably at 300 kV bias voltage using alkali-antimonide photocathodes. This presentation describes key electrostatic design features of th…
Production of Highly Polarized Positrons Using Polarized Electrons at MeV Energies Open
The Polarized Electrons for Polarized Positrons experiment at the injector of the Continuous Electron Beam Accelerator Facility has demonstrated for the first time the efficient transfer of polarization from electrons to positrons produced…
Status of High Polarization DC High Voltage GaAs Photoguns Open
This talk will review the state of the art of high polarization GaAs photoguns used worldwide. Subject matter will include drive laser technology, photocathode material, gun design, vacuum requirements and photocathode lifetime as a functi…