Engineering Status

Review Charge designs Talks by Peggs, Mayes, Berg, Lou Design Report Remaining Talks

Upcoming Talks FFAG Magnets FFAG Girder Splitter DC Injector Injector Cryomodule Main Linac Cryomodule Vacuum System Beam Stop Power Supplies Controls Instrumentation Shielding Systems Integration Today (Monday) Tomorrow (Tuesday)

FFAG Magnets Quadrupole / Horizontal OR Vertical dipole correctors Permanent Halbach wedges glued in place to defined shimmed location on an aluminum frame Alignment pins for repeatable assembly of Halbach magnet Corrector assembly disassembles to allow for vertical Halbach split Alignment pins for repeatable assembly of Halbach magnet

FFAG Girders Integrated H2O manifold Flexible component mounting “pusher block” array Cable tray

Splitter Hardware design in progress Splitter RX Layout will use common components Requirements Splitter SX Layout Magnetic Design Vacuum Design Mechanical Design Summary 10 meters

0.5 cm square with 0.25-cm diameter hole Splitter Quadrupole Feasibility Study and Design Concept Requirements Splitter SX Layout Magnetic Design Vacuum Design Mechanical Design Summary Parameter Quadrupole (14x14x15) Model version number 12 Number of magnets 64 Gap or Bore (cm) 4.5 Steel height (cm) 14 Steel width (cm) Steel length (cm) 15 Width including coil (cm) 17.2 Length including coil (cm) Pole width (cm) 3.36 Good Field Region (mm) ± 15 Central Field Uniformity∗ (%) ± 0.01 Field Integral Uniformity∗ Field (G)/Gradient (G/cm) 10-490 NI (Amp-turns)∗∗ 20-985 Turns per coil 4 + 3 Coil cross section (cm x cm)∗∗ 0.55 x 1.65/2.20 Conductor cross section∗∗ 0.5 cm square with 0.25-cm diameter hole Conductor straight length (cm)∗∗ Coil inner corner radius (cm)∗∗ 0.5 Conductor length per turn, avg (cm)∗∗ 39.1 Rcoil (Ω)∗∗ 0.00219 L (mH)∗∗ 4 x 0.058 = 0.23 Power supply current (A)∗∗ 5.0-140.7 Current density (A/mm2 )∗∗ 0.3-7.0 Voltage drop for 1, 2 or 4 coils (V)∗∗ 0.0-1.2 Power/magnet (W)∗∗ 0.2-173 ∗ Defined as horizontal deviation from the ideal field (BY − BidealY )/BidealY ∗∗ Conceptual model parameters for use as guidance only

DC Injector Work to date: Moved from Electron Source Development Lab Installed in final position Baked HV Conditioned Completed Sept 2016, Stable Operation at 350 kV

Injector Cryomodule ICM Work: Installation June 2016 Cool down to 4K (6/9/2016) System check at 2K (6/15/2016) ICM is fully tested and ready for RF power (October 2016) Currently operating at 2K (Jan 2017) Active pumping of Insulation Vacuum Vessel Active pumping of beamline UHV Input coupler N2 purge while ICM is idle (RF off) Tested with beam up to 1000 kV/cavity (Dec 2016)

Main Linac Cryomodule

Vacuum Two 4-cell beampipes (on two girders) is connected via sliding joints One of the vacuum beampipe design challenges is satisfying both the beam aperture and magnet clearance requirements, while hosting a large suite of functional components (BPMs and beam instrument, vacuum pumping and gauging) The 4-cell beampipe designs for the hybrid magnets (shown here) meet these requirement. This work will be repeated when the Halbach FFAG cell geometry/lattice becomes available.

Beam Stop

Power Supplies Splitter Quads, Dipoles, and Septa FFAG Arc Correctors Based on preliminary specifications of magnets John Barley has prepared multiple RFP, and collected quotations from numerous companies This is primarily a procurement exercise, but is highly dependent on final magnet specifications Moving quickly to splitter magnet procurement is essential

Controls

Beam Instrumentation

Shielding

Systems Integration

Complete and Operational DC Electron Source Laser Drive system Buncher cavity Injector Cryomodule Merger Diagnostics Beamline (EMS, Deflector, etc.) Standard diagnostics: Viewscreen 4 button BPM Current monitor Main Linac Cryomodule Cryogenic Support (HX Can, distribution valve box, transfer lines, etc.) Beam stop (600kW)

New CBETA Designs Splitter and table Magnet design Vacuum system starting Table FFAG Magnet and Girder Prototype magnets Productionizing magnets Girder Status Layout and shielding (preliminary / ongoing) Vacuum System Halbach changes

Engineering Documentation All engineering documentation generated by the collaboration is fully shared Both laboratories use different engineering software platforms A shared, cloud based repository of models and drawings will be maintained (Box most likely) All models will be shared as STEP files for interoperability, but also in their native formats All drawings will be stored in their native formats, but also in PDF Cornell is upgrading to a new version of Autodesk Inventor this spring which will allow direct import of BNL’s CREO model files Due to security both groups will maintain their current cloud based data storage (Vault at Cornell, Sharepoint at BNL). Outside access is difficult.

Conclusions Experienced Engineering (ME / EE) teams at both laboratories Extensive prior art on which to draw Large fraction of CBETA is already built or based on existing proven designs BPM system (DAQ and vacuum side hardware already existent) Halbach magnets already extensively prototyped and validated by testing Remaining work in progress