An Alternative Ion Complex Agenda /some preliminary estimations/

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Presentation transcript:

An Alternative Ion Complex Agenda /some preliminary estimations/ Yaroslav Derbenev derbenev@jlab.org JLEIC R@D Meeting 04.07.16

Basic bodies 135 MeV linac 3 GeV racetrack booster (warm or SF) ECR used as 20 GeV Large Booster 100-200 GeV ICR (SF or Cos)

Small Booster (0.5 - 0.3) GeV/c injected momentum (p - Pb) Strip-injection for H-, D-. DC cooler for stacking ions 3(Z/A) GeV accelerated beam

e-Collider Ring used as Large Booster Prerequisites Maximum warm dipoles field of ER below 0.4 T (12 GeV electrons) Such ring can easily accelerate protons from 3 GeV up to 20-25 GeV (reaching 1.2 T dipole field) Constraints Other (stronger) quads required to serve both beams. Might be SF or Cos. Fast ramp is not critical. Bypath to overcome e-SRF cavities Additional benefits - e-beam: stronger quads ⟶ better rad. emittance (!) - protons: below the transition energy

Injection to ICR 30 – 40 meters as long step (including septums) for ejection/injection to ICR after acceleration Does not present an issue, according to my estimation

Electron Collider Ring Layout Circumference of 2154.28 m = 2 x 754.84 m arcs + 2 x 322.3 straights Figure-8 crossing angle 81.7 Electron collider ring w/ major machine components e- R=155m RF Spin rotator CCB Arc, 261.7 81.7 Forward e- detection IP Tune trombone & Straight FODOs Future 2nd IP

Ion Collider Ring Layout Figure-8 ring with a circumference of 2153.9 m Two 261.7 arcs connected by two straights crossing at 81.7 geom. match #3 disp. supp./ disp. supp./ geom. match #2 norm.+ SRF Arc, 261.7 tune tromb.+ match elec. cool. R = 155.5 m 81.7 future 2nd IP Polarimeter det. elem. disp. supp. ions beam exp./ match IP disp. supp./ geom. match #3 disp. supp./ geom. match #1