TUXAA01
ANL, Lemont, Illinois, USA
The new Radioactive Ion Separator (RAISOR), formerly Argonne In-flight Radioactive Ion Separator (AIRIS), was recently installed and commissioned at the Argonne Tandem Linear Accelerator System (ATLAS). RAISOR is a chicane of four dipoles with four complementary quadrupoles, and will enable the selection of secondary radioactive ion beams produced via the in-flight method. RAISOR will expand the scope of the in-flight beam program at ATLAS by improving beam purity, increasing the allowable primary beam intensity, and enabling secondary beam delivery to all ATLAS high energy target stations. Along with the magnets, new diagnostics and high power slits were installed to identify low intensity secondary beams and safely dump the high intensity primary beam, respectively. Commissioning results and the expected performance of the full system will be presented.
ANL, Lemont, Illinois, USA
FRIB, East Lansing, Michigan, USA
An Electron Ion Collider (EIC) is the highest priority for future U.S. accelerator-based nuclear physics facility following the completion of the Facility for Rare Isotope Beams (FRIB). Two laboratories are competing to host the future EIC: Brookhaven National Lab. (BNL) and Jefferson Lab. (JLab). The baseline design of JLab’s Electron Ion Collider (JLEIC) ion complex comprises a pulsed superconducting (SC) linac injector capable of accelerating all ions from protons to lead, where proton and light ion beams can be polarized. After reviewing the design requirements for the injector linac, important design choices such as the room-temperature (RT) section design, the transition energy between the RT and SC sections and the stripping energy for heavy ions will be discussed. The design of the different linac sections will be presented as well as the results of end-to-end beam dynamics simulations for polarized deuterons and un-polarized lead ions.
WEYAA02
ANL, Lemont, Illinois, USA
The recently approved multi-user upgrade [1] of the superconducting linac, ATLAS, will enable simultaneous acceleration and delivery of two ion beams to different experimental areas. In the initial phase, one stable, nearly continuous wave, beam from the ECR ion source and one pulsed radioactive beam from the EBIS charge breeder ion source of the Californium Rare Isotope Beam Upgrade (CARIBU-EBIS) will be interleaved in time via an electrostatic deflector at injection, and accelerated through the first two sections of the linac. At that point, one of the beams is deflected via a fast switching magnet to a lower energy experimental area while the other is further accelerated through the third linac stage of ATLAS. Details of the proposed implementation and the expected gains from this upgrade will be presented. In addition to enhancing the nuclear physics program, this upgrade will allow some applications such as material irradiation, isotope production, and radiobiology [2].
* ’Simultaneous Acceleration of Radioactive and Stable Beams in the ATLAS Linac’, B. Mustapha et al, HB-2014.
** ’The ATLAS Multi-User Upgrade and Potential Applications’, JINST 12 (2017) T12002.