TUPAF04
RadiaSoft LLC, Boulder, Colorado, USA
ParaTools, Inc., Eugene, Oregon, USA
BNL, Upton, Long Island, New York, USA
Sourcery Institute, Oakland, California, USA
The particle tracking code Zgoubi [*] has been used for a broad array of accelerator design studies, including FFAGs and EICs [**]. Zgoubi is currently being used to evaluate proposed designs for both JLEIC and eRHIC [***], and to prepare for commissioning the CBETA BNL-Cornell FFAG return loop ERL [****]. Moreover, Zgoubi is now the subject of a Phase II SBIR aimed at improving its speed, flexibility, and ease-of-use. In this paper, we describe our on-going work on several fronts: (i) parallelizing Zgoubi using new features of Fortran 2018, including coarrays [*****]; (ii) implementing a new particle update algorithm that requires significantly less memory and arithmetic; and (iii) developing symplectic tracking for field maps. In addition, we describe plans for a web-based graphical interface to Zgoubi.
*F Meot, FERMILAB-TM-2010
**F Lemuet, NIM-A, 547:638; F Lin, IPAC17:WEPIK114
***A Kondratenko, IPAC18:MOPML007; F Meot, IPAC18:MOPMF013
****G Hoffstaetter, IPAC18:TUYGBE2
*****J Reid, WG5 N2145
WEPAF03
RadiaSoft LLC, Boulder, Colorado, USA
Texas A&M University, College Station, USA
JLab, Newport News, Virginia, USA
Relativistic magnetized electron cooling in untested parameter regimes is essential to achieve the ion luminosity requirements of proposed electron-ion collider (EIC) designs. Therefore, accurate calculations of magnetized dynamic friction are required, with the ability to include all relevant physics that might increase the cooling time, including space charge forces, field errors and complicated phase space distributions of imperfectly magnetized electron beams. We present simulations relevant to the JLEIC design, using the BETACOOL and JSPEC codes. We also present recent work on Warp simulations of the electron beam through the solenoid field. Space charge neutralization is provided by impact ionization of a background hydrogen gas. For optimal cooling it is essential that space charge be sufficiently neutralized. We also present recent work on a new analytic treatment of momentum transfer from a single magnetized electron to a drifting ion, and its use for calculations of dynamic friction.