1. MEIC Design Update
Fulvia Pilat
MEIC R&D Meeting
May 21, 2015

2. JSA Science Council, May 7 2015
Topics
MEIC baseline
MEIC cooler
Cooler Design effort at JLAB
Feedback on proposal from McIntyre
MEIC R&D
SF magnets
Crab cavities
952 MHz cavity design
Site Characterization
SBIR solicitations
JSA Science Council, May

3. JSA Science Council, May 7 2015
Race Track option
Arc radius 195 m
Straight 450 m
Circumference 2112 m
PEP-II arc radius 232 m
Figure-8 arc radius 155 m
JSA Science Council, May 3

4. JSA Science Council, May 7 2015
Racetrack vs. Figure-8
PRO’s
Less SR power (due to large bending radius)
Higher current at high electron energies (able to reach 12 GeV)
Much better electron emittance (much smaller dipole bending angle)
Much better electron polarization (much smaller SR)
Reaching higher ion energies
Less super-ferric dipoles (smaller total bending angle, 360° vs °)
CON’s
ion polarization, particularly, deuteron polarization
DECISION FACTORS
Physics requirements (Com, COM vs. deuteron )
Technical considerations ( performance, cost)
Political considerations
Discussion started with JLAB experimental and theoretical phisicist
JSA Science Council, May 4

5. Baseline optimization
Looking at optimization of the baseline before launching the CDR:
Lowering the energy of the SC linac
study done, feasible, defer the ANL design
Use of FNAL DC cooler at 8 GeV
IPAC paper by McIntyre, need to evaluate proposal give feedback, if positive Peter will submit proposal to NP
Comparing a racetrack layout to the figure-8
preliminary discussion with experimental physicist endorses importance of deuteron physics
we will keep Figure-8 as baseline and racetrack as alternative
 e-ring improvement needed
JSA Science Council, May

6. JSA Science Council, May 7 2015
Cooler Design team
Scope: produce a design for the single pass ERL cooler, while keeping the re-circulator cooler option open (in case of technical problems in developing the single pass design or as a future upgrade)
Kick-ff meeting (yesterday): technical challenges and key personnel identified
To be developed: resource loaded schedule consistent with CDR timeline and personnel availability
Regular meetings: initially every 2 weeks – possibly to be interleaved with general MEIC R&D meetings
JSA Science Council, May

7. Deliverables/Schedule/Resource Loading
Feasibility assessment
Preliminary design & physics analysis
Initial engineering specifications, tolerances, sensitivity matrix
Evaluation of technical readiness/R&D opportunities & plan
Cost estimate
Schedule
10-12 FTE; ~10-12 staff => 1 year (e.g. UV Demo proposal, IR Demo design), ~5-6 staff => 2 years
Resource Load (2 year option)
Cooling Specifications Derbenev, Zhang
Work coordination Benson, Pilat
Source Physicist Suleiman
Injector physicist Hannon
Machine design physicist Douglas, Tennant
Simulation physicist (S2E) Roblin, He Zhang
Collective effects (theory) Li
Diagnostics physicist (half) Evtushenko
EE (half) – diagnostics, RF drive – Garza to provide resource
ME (half) – magnets, vacuum – Michalski to provide resource
(S)RF (half) – cooler-specific (S)RF issues, especially implications of magnetized beam – Rimmer to provide resource

8. Overview of pre-project R&D
Total cost of
pre-project R&D:
~ 5 M$
JSA Science Council, May

9. Upcoming R&D activities
June 4: Review of TAMU super-ferric R&D proposal (all day) External reviewers: Steve Gourlay, LBL, Peter Wanderer, Ramesh Gupta, BNL Internal reviewers: McKeown, Pilat, Michalski, Baggett, Biallas, Hyatt, Daly + available 12 GeV magnet engineers June 9: Discussion and plans for MEIC crab cavity R&D (afternoon) Participants: McKeown, Pilat, Michalski, Delayen, De Silva, Castilla, Park, Zhang, Rimmer, +…….. (please indicate who else should be invited) June 18: Discussion and plans for the MEIC 952 MHz R&D Participants: McKeown, Pilat, Michalski, Delayen, Zhang, Rimmer +….. (please indicate who else should be invited)
JSA Science Council, May

10. Site characterization activities
VA funds secured
Scope of work
Land survey and geotechnical studies
Environmental assessment
Site development
Facilities conceptual development
Timeline
1-2 years
Status
Proposals being reviewed
There will be enough information to evaluate the underground tunnel option
JSA Science Council, May

11. EIC Cost Review - January 26-28, 2015
Backup Slides
EIC Cost Review - January 26-28, 2015

12. Pre-Project R&D (for CD-1)
PROTOTYPES
Development and testing of 1.2m 3T SF magnets for MEIC ion ring and booster Collaboration with Texas A&M, K$ FY15-16
Crab cavity development (collaboration with ODU, leveraging R&D for LHC / LARP crab)
952 MHz Cavity development, 1.5 M$, FY15-17
DESIGN OPTIMIZATION
Optimization of conceptual design of MEIC ion linac
Collaboration with ANL and/or FRIB, 300 K$ FY 15-17
Design and simulation of fixed-energy electron cooling ring (integrated in the Ion Ring arc cryostats) to enable cooling and stacking of polarized ions during each store so that a fresh high- brightness fill is ready when needed
Collaboration with Texas A&M, ~ 300 K$ FY 15-17
Optimization of Integration of detector and interaction region design, detector background, non- linear beam dynamics, PEP-II components
Collaboration with SLAC (NP grant 60 K/year) FY 12-17
Feasibility study of an experimental demonstration of cooling of ions using a bunched electron beam
Collaboration with Institute of Modern Physics, China, LDRD 100 K$

13. Pre-Project R&D MODELING
Studies and simulations on preservation and manipulation of ion polarization in a figure-8 storage ring
Collaboration with A. Kondratenko, DOE NP grant ~100K$, FY 13-15
Algorithm and code development for electron cooling simulation
LDRD, 80 K$ FY 15-16
We believe that this covers our R&D needs for the CDR and CD1

14. On-Project R&D PROTOTYPES VALUE ENGINEERING (cost and risk reduction)
Prototype for magnetized ERL e-cooler gun 3 M$
952 MHz prototype cryomodule components 2 M$
Crab cavity prototype cryomodule components 2 M$
Prototype for ion ring IR FF triplet M$
VALUE ENGINEERING (cost and risk reduction)
Super-ferric Cable-in-Conduit magnets R&D for the ion rings 1.5 M$
Optimization of of PEP-II components (tubes, LLRF, vacuum) M$
R&D on high-efficiency RF sources M$
Optimization of linac front end components for low duty factor 1 M$
Total M$